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WrenchLane is an AI diagnostic and repair assistant for car workshops. You choose the car, describe the problem or enter the fault codes, and get possible causes ranked for that exact vehicle, with checks to run, a repair guide and invoice text. It works in the browser and in the WrenchLane apps for iPhone, iPad and Android.

Learn more: Diagnostic (vehicle-first start), Possible causes ranked by probability and severity, WrenchLane app for iPhone, iPad and Android

Open app.wrenchlane.com, click Sign up and fill in an account name (your workshop or your own name), country, email and password. Accept the terms, click Sign up for free and enter the code we email you. You are signed in and your workshop starts on the Free plan.

Learn more: Sign up for free

No. Every new workshop starts on the Free plan without a card. You only add a card when you buy a paid plan.

Learn more: Free (limited), Sign up for free

No. Paid plans are charged from the first day; there has been no self-serve free trial since 26 August 2026. The One plan comes with a 14-day money-back guarantee, and every paid plan can be cancelled anytime. Trial periods are only set up by the WrenchLane sales team or through a partner programme, and a banner then counts down the days.

Learn more: Trial period (sales and partner trials), Upgrade with Stripe Checkout

The country decides which vehicle search and data your workshop gets. Workshops in the US, Canada and Mexico get MOTOR Images & diagrams, workshops in the 32 European countries get InfoPro technical data, and other countries get AI diagnostics, TSBs and Ask WrenchLane without premium data. US and UK accounts use imperial units.

Learn more: Workshop country (decides data region)

A computer, tablet or phone with an internet connection, in the browser or in the WrenchLane app. You keep your own OBD reader: type the codes, say them, or take a photo of the reader's screen.

Learn more: OBD reader photo scan (fault codes from a photo), WrenchLane app for iPhone, iPad and Android

Menu, Help & docs, Get started opens a guide with a section for each part of the app available in your region. Menu, Help & docs, New features lists what changed in each version.

Learn more: Get started guide, New features and product overview

Go to Menu, Support, write a title and a message and click Send; the reply comes to your email. You can also email support@wrenchlane.com.

Learn more: Support

Yes. On wrenchlane.com you can book a demo and bring a recent diagnostic challenge from your shop, which is used as a live example, or email hello@wrenchlane.com. The WrenchLane YouTube channel also has a short video for every release from 3.1 to 3.10.

Learn more: Book a demo / Contact / Support, WrenchLane YouTube channel (demos, release videos, fault-code shortlists)

Select the vehicle on Start, click the Diagnostic card and choose New diagnostic. Fill in the description, the error codes and the mileage, then click Analyze.

Learn more: Diagnostic (vehicle-first start), Diagnostic form: description, error codes and mileage

Yes. A description of the symptoms is enough, for example a noise or a rough idle. The form needs either a description or at least one error code.

Learn more: Diagnostic form: description, error codes and mileage

Codes such as P0011, 12345 or 3F4A work, and up to 20 codes are looked up at a time. Manufacturer codes such as BMW CD0100 are looked up whole, and each code's meaning appears under the field as you type.

Learn more: Live fault code descriptions as you type, Diagnostic form: description, error codes and mileage

No. Click the camera button next to Error codes and take or choose a photo (JPEG or PNG) of the scan tool's screen; WrenchLane reads the codes and their descriptions into the form. You can also speak them with the microphone.

Learn more: OBD reader photo scan (fault codes from a photo), Voice input for the problem description

Yes. Click the microphone in the Description field and describe the car, the codes and what you have already checked. Recording stops after about 2 seconds of silence or when you click again, and the text is added to the description.

Learn more: Voice input for the problem description

When the description and codes are not specific enough, a Help us understand better panel shows a few targeted questions with one-tap answers. Your answers are sent with the analysis, and you can dismiss the questions if you prefer.

Learn more: Help us understand better (AI follow-up questions)

A list of possible causes for that exact vehicle, ranked, each marked with severity High, Medium or Low. Open a cause to see its description, suggested tests, common symptoms, related systems and components, plus Videos and TSBs tabs.

Learn more: Possible causes ranked by probability and severity, Repair videos and TSBs per cause

Each probability is the likelihood of that one cause on its own. Several causes can be likely at the same time, so the numbers are not shares of a whole.

Learn more: Possible causes ranked by probability and severity

Results stream in while the AI works, with progress steps and an estimated time; complex cases can take a few minutes. The analysis keeps running if you reload the page or lose the connection, and a run that fails does not use up a Free plan's daily diagnosis.

Learn more: Streaming AI analysis with progress

Click Chat about this and choose Why this cause? or How to verify? to get the reasoning or a verification procedure in the chat. Click This is not it to rule the cause out.

Learn more: Cause quick actions: Why this cause?, How to verify?, This is not it

Yes. Click Refine diagnosis, add what you found, check the excluded causes and click Re-do diagnosis; the new result takes the eliminated causes into account. Re-runs are kept together with the original as versions, and a re-run can take up to 3 minutes.

Learn more: Refine diagnosis and Re-do diagnosis

Each cause has step-by-step checks that say what to look for and take a Yes or No answer. On paid plans the checks are researched for the exact car; on the Free plan you see draft checks with an upgrade prompt. Your answers are saved with the car and carry into the repair guide.

Learn more: Checks to run on every cause

Yes. In European countries, with technical data access, matching manufacturer bulletins, SmartCASE items and recalls are shown above the possible causes. Every plan also gets a TSBs tab on each cause, and since 28 September 2026 matching TSBs also feed into the analysis itself.

Learn more: Repair videos and TSBs per cause

In European countries, electrical causes list the components to check in order, with Locate, Verify and Repair and a guided wiring-diagram test, and an Error code diagnosis card gives guided tests per code. Highlighted part names in the text link into the technical data; in North America they open Images & diagrams. Opening the data needs a Small or Large plan, the One plan's unlocked vehicle or the demo vehicle.

Learn more: Technical-data links in the diagnosis text

Starting the repair on a cause confirms it and opens a repair guide written for that car: a work description, step-by-step instructions you tick off, labor time and parts. It takes about 1 to 2 minutes to create, your progress is saved, and Finish & create invoice completes the job.

Learn more: Repair guide (from confirmed cause to guided repair)

WrenchLane builds the guide for the exact car from OEM repair information and technical data, together with the checks you recorded, and lists its sources in a "What these instructions are based on" block. Values that could not be confirmed are flagged as needing verification, and in European countries the book times come from InfoPro.

Learn more: Repair guide (from confirmed cause to guided repair)

Yes. Click Finish on the diagnostic, tick the causes you fixed (or describe the real cause), list parts replaced and other work, then click Complete & generate invoice. You get invoice text you can edit, copy and save to paste into your billing system, and you can reopen it later from the vehicle page with View invoice.

Learn more: Complete diagnostic and generate invoice text

Yes. Click Print on the diagnostic result and choose Print or Save as PDF in the browser dialog. Buttons and other interactive parts are left out of the printout.

Learn more: Print or save the diagnostic report as PDF

Under History on the Start page, filter by Ongoing, Completed, Service or All and open the car. On a diagnostic page, Switch diagnostic lists the other sessions for the same car. The Free plan shows the 5 latest ongoing diagnostics.

Learn more: Diagnostic history: ongoing and completed diagnostics per car, History (vehicles and saved work)

Yes. Every diagnostic is saved with its car, and reopening it restores the results, your check answers and the repair progress, on any device where you sign in.

Learn more: Diagnostic history: ongoing and completed diagnostics per car

Yes. guides.wrenchlane.com has free diagnostic guides for common codes and symptoms, and a Beta checker that matches a symptom or code to up to 3 published guides. wrenchlane.com also has a page per fault code built from diagnostics run in WrenchLane.

Learn more: WrenchLane Guides (diagnostic guides), Free symptom & DTC checker, Fault code pages on wrenchlane.com (fault-code cluster)

Ask WrenchLane is the chat for the car you have selected: every car keeps one thread, and you ask in plain language. Type in the search bar and choose Ask WrenchLane, or click Open chat.

Learn more: Ask WrenchLane vehicle chat (one chat per car), Ask WrenchLane from the vehicle search bar

Yes. On a diagnostic page it knows the codes, causes and your answers, and on a repair guide it also knows the repair steps, so you can ask things like "how do I do step 3?".

Learn more: Chat that follows the diagnostic or repair on screen

Yes. When an answer uses outside sources, for example for part numbers, suppliers, prices or procedures, Sources chips under the answer open the cited pages.

Learn more: Sourced answers with citations

Yes. Answers can show official manual drawings for the exact vehicle when you have technical data access for it, web images that link to their source, and repair videos that play in the app.

Learn more: Diagrams & images in answers (including official manual), Repair videos in answers

3 chat messages a day; One, Small and Large have no daily limit. The count resets at midnight UTC and is shared by the workshop.

Learn more: Daily AI limits on the free plan (chat, diagnostics, AI search), Daily limits (diagnostics, chat, AI search, plate lookups)

The search bar understands plain-language questions and takes you to the right part, manual, wiring diagram or fault code in the vehicle's data. The Free plan includes 10 AI searches a day; paid plans have no daily limit.

Learn more: Ask WrenchLane from the vehicle search bar

Yes. Clear chat removes all messages in that car's thread, and it cannot be undone.

Learn more: Ask WrenchLane vehicle chat (one chat per car)

The chat answers in the language you have selected in the app and uses your workshop's units, metric or imperial.

Learn more: Ask WrenchLane vehicle chat (one chat per car)

Yes. On a phone, tap the floating Open chat button and the chat opens full screen over the vehicle page.

Learn more: Vehicle chat on phones (Open chat button)

It depends on your workshop's country. In Sweden you can use the license plate, VIN or the model dropdown; in other European countries VIN or the dropdown; in the US, Canada and Mexico year, make, model, engine and sub-model; elsewhere a model dropdown.

Learn more: Select vehicle by model (Dropdown), Vehicle selection by year, make, model and engine (US, Canada, Mexico)

Yes, in the 32 European countries: choose the VIN tab, enter the VIN and click Decode VIN, then pick your version if several are listed. In the US, Canada and Mexico you select the vehicle by year, make, model and engine instead.

Learn more: Vehicle selection by year, make, model and engine (US, Canada, Mexico)

Every plan can open one fully unlocked demo vehicle to see the premium data: a 2015 BMW X5 (F15) xDrive 25d in European countries and a 2018 Ford F-150 3.5L EcoBoost in North America. On the Start page, a banner above Select your vehicle says Try WrenchLane with this demo vehicle; click Try it. The F-150 needs the MOTOR end-user terms to be accepted.

Learn more: Try InfoPro free / Try Images & diagrams free (demo vehicle)

Small includes premium technical data for 50 different vehicles per calendar month and Large for 200. Opening a vehicle again in the same month does not count again, the demo vehicle never counts, and when the limit is reached new vehicles open again next month. Your usage is shown in Plan & billing.

Learn more: Premium data vehicles per month

On the One plan you can permanently unlock one vehicle and get its premium data: InfoPro technical data in Europe or MOTOR Images & diagrams in North America. The unlocked vehicle also gets OEM-verified measurements. The choice cannot be changed later, and other vehicles then show Unlock limit reached.

Learn more: Unlock this vehicle

A panel with the vehicle's image, engine, power, fuel and mileage, and cards for Diagnostic, Images & diagrams, Service & maintenance, TSBs, Manuals, Electronics and OEM info, depending on your region. Cards show ongoing work, invoices and saved service reports for that car.

Learn more: Vehicle page (action cards)

The car and every diagnostic and service report for it are removed from History, and this cannot be undone.

Learn more: History (vehicles and saved work)

No. History, diagnostics and saved service reports are personal: each mechanic's diagnostics and history are saved to their own login, so colleagues in the same workshop do not see them.

Learn more: History (vehicles and saved work)

In European countries the technical data is InfoPro data from Infopro Digital Automotive, the team behind HaynesPro. In the US, Canada and Mexico, Images & diagrams come from MOTOR.

Learn more: Images & diagrams (OEM wiring diagrams and component locations)

For US, Canadian and Mexican vehicles, Images & diagrams lets you browse and search OEM wiring diagrams and component locations from MOTOR. The first time, you accept the MOTOR end-user terms.

Learn more: Images & diagrams (OEM wiring diagrams and component locations), MOTOR Images & Diagrams licence rules

On Small and Large, and on the One plan's unlocked vehicle, causes and checks show OEM-verified torque, voltage and resistance values for the exact car. Where no verified value is available, and on the Free plan, values are marked AI-estimated.

Learn more: OEM-verified measurements (vs AI-estimated values)

Yes, on every plan. Open the TSBs card on the vehicle page, enter a description or error codes and click Search. When the match quality is low, results are hidden behind Poor search quality, and you can still show them.

Learn more: TSBs (technical service bulletin search)

Free, One, Small and Large, with monthly or yearly billing on the paid plans. Free lets you try a limited part of WrenchLane; One is for a single user with one fully unlocked vehicle; Small and Large are for workshop teams of up to 11 users with full premium data.

Learn more: Free (limited), One, Small, Large

Each day: 1 diagnostic, 3 chat messages, 10 AI searches and 1 license plate lookup, plus TSB search, diagnostic reports, the 5 latest ongoing diagnostics in History and the demo vehicle. Free is for 1 user and shows AI-estimated values instead of premium technical data.

Learn more: Free (limited), Daily limits (diagnostics, chat, AI search, plate lookups)

At midnight UTC, not local midnight. The limits are counted for the whole workshop, not per user.

Learn more: Daily limits (diagnostics, chat, AI search, plate lookups)

A preview opens that shows what upgrading adds, with an Upgrade button for admins and, where available, Open demo vehicle to try the feature on the demo car. Mechanics are asked to contact their workshop admin.

Learn more: Upgrade preview, Daily limits (diagnostics, chat, AI search, plate lookups)

They have the same features and both allow up to 11 users. The only difference is premium data: 50 vehicles a month on Small, 200 on Large.

Learn more: Small, Large

For a single user who mostly works on one car: unlimited diagnostics, chat and AI search, full history, and one vehicle permanently unlocked with its premium data and OEM-verified measurements. One does not include team members, and it comes with a 14-day money-back guarantee.

Learn more: One

See the pricing page on wrenchlane.com or Choose your plan in the app. Prices are shown in your currency, exclude VAT, and tax is added at checkout based on your billing country.

Learn more: Choose your plan (pricing page)

As the workshop admin, go to Menu, Profile, Plan & billing and click Upgrade. Choose monthly or yearly and your currency, click Get One, Get Small or Get Large and pay on the Stripe checkout page.

Learn more: Upgrade with Stripe Checkout, Choose your plan (pricing page)

Yes. Choose a plan on the wrenchlane.com pricing page, sign up and confirm the email code, and you are taken straight to checkout for that plan.

Learn more: Buy a plan straight from the website pricing page

Yes, on the One plan: it comes with a 14-day money-back guarantee. Small and Large are charged from the first day, can be cancelled anytime and have no money-back guarantee.

Learn more: Choose your plan (pricing page), One

Yes. In Plan & billing click Change plan and Switch plan on the plan you want, then confirm. A change that takes effect later is shown with its date and can be undone with Cancel scheduled change; switching is blocked if your team is larger than the new plan allows.

Learn more: Switch plan (and scheduled plan changes)

In Plan & billing click Change plan and Downgrade to Free on the Free card, then confirm. Your paid plan stays active until the end of the billing period, and until then you can click Undo cancellation. Remove all team members first.

Learn more: Downgrade to Free (cancel) and Undo cancellation

In Plan & billing, Manage subscription opens the billing portal with your invoices and subscription details, and Update payment method changes your card and billing address. Plan & billing also shows the next billing date.

Learn more: Manage subscription and payment method

You keep full access while the payment is retried or an invoice is open. If the payment is not completed in the end, the subscription is cancelled and the workshop moves to the Free plan.

Learn more: Access when a subscription ends or payment is late

For workshop chains, franchises and custom needs, email hello@wrenchlane.com or use the contact page on wrenchlane.com.

Learn more: Chains and custom needs: Contact us

As admin, go to Menu, Profile, Team, Manage team and click Add user. Enter a username, an optional email, the role and a password, click Create, and give the login details to your colleague; there is no email invitation.

Learn more: Manage team (add mechanics, roles)

Free and One have 1 user. Small and Large have up to 11 users each.

Learn more: Manage team (add mechanics, roles), Small, Large

Both use diagnostics and all vehicle data. Only admins see Plan & billing and Team, open the pricing page and change the plan; mechanics who try are asked to contact their administrator.

Learn more: Roles: Admin and Mechanic

Yes. A user created by the admin can log in with the username and the password the admin set, and is asked to choose a new password the first time.

Learn more: Log in, Manage team (add mechanics, roles)

If the user has an email address, use Forgot password? on the login page to get a code by email. Otherwise the admin can set a new password for that user in Manage team.

Learn more: Reset password (Forgot password?), Change password

In Manage team, remove the user. Admins cannot be removed directly: change their role to Mechanic first, and at least one admin must remain.

Learn more: Manage team (add mechanics, roles)

When a workshop's plan drops to Free, the extra team members are locked until the admin upgrades again. Plan & billing shows how many members are locked.

Learn more: Manage team (add mechanics, roles), Access when a subscription ends or payment is late

Yes, a free app for iPhone and iPad on the App Store and for Android on Google Play. It gives you the same WrenchLane as the web, with phone touches such as swipe back and a full-screen chat. iPhone and iPad need iOS 15 or later.

Learn more: WrenchLane app for iPhone, iPad and Android

WrenchLane is available on the App Store and Google Play. Search for WrenchLane in the store on your phone or tablet.

Learn more: WrenchLane app for iPhone, iPad and Android

No. Sign in with the same email and password as on app.wrenchlane.com, and you stay signed in between launches until you log out.

Learn more: Sign in and stay signed in on the app

No. The app needs an internet connection. Without one it shows a No internet connection screen with Try again.

Learn more: WrenchLane app for iPhone, iPad and Android, WrenchLane couldn't load (recovery screen)

Yes. In the iOS app you buy One, Small or Large through Apple's purchase sheet at the App Store's local price, and you can restore earlier purchases with Restore previous purchases. If a yearly plan is not offered in the app, it is marked as available on the web.

Learn more: Subscribe with Apple In-App Purchase (iOS app)

Where you bought it. A subscription bought in the iOS app is managed through Apple; a subscription bought on the web or through our sales team is managed on the web, and the iOS app then tells you to visit wrenchlane.com in a browser.

Learn more: Which device manages your subscription (Apple vs web billing)

In the iOS app go to Profile, Plan & billing and tap Report a problem with this purchase to open Apple's refund request. Apple decides and emails you; if the refund is granted, the workspace moves to the Free plan.

Learn more: Report a problem with this purchase (Apple refund request)

The Android app uses the same checkout and billing portal as the web, opened in a tab inside the app. When you close the tab, the app shows your new plan.

Learn more: Subscribe and manage billing in the Android app

On iPhone and iPad, a link to app.wrenchlane.com opens in the WrenchLane app when it is installed. On Android such links open in the browser for now.

Learn more: Open WrenchLane links in the app (universal links / app links)

Tap Try again. If it keeps happening, tap Sign out and try again and then sign in again; this fixes a stuck session without reinstalling.

Learn more: WrenchLane couldn't load (recovery screen)

The app can receive push notifications from WrenchLane and asks for permission after you sign in. To turn them off, use your phone's settings.

Learn more: Push notifications in the app

26: English, Swedish, Danish, German, Norwegian, Finnish, Hindi, Spanish, French, Italian, Turkish, Russian, Ukrainian, Polish, Portuguese, Arabic, Persian, Romanian, Dutch, Czech, Slovak, Bulgarian, Estonian, Latvian, Lithuanian and Simplified Chinese.

Learn more: Language

Open the menu and pick a language in the Language list under Preferences; the choice is remembered for 30 days. You can also change it on the sign-in and sign-up pages.

Learn more: Language

Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.

Vehicle selection by year, make, model, engine and sub-model, MOTOR Images & diagrams (wiring diagrams and component locations) on Small and Large or for the One plan's unlocked vehicle, AI diagnostics, TSBs and Ask WrenchLane. The demo 2018 Ford F-150 is open on every plan.

Learn more: Vehicle selection by year, make, model and engine (US, Canada, Mexico), Images & diagrams (OEM wiring diagrams and component locations), Try InfoPro free / Try Images & diagrams free (demo vehicle)

You still get AI diagnostics, TSBs and Ask WrenchLane, and you choose the vehicle from a model list. Manuals, Service & maintenance, Electronics and OEM info are not available, and there is no demo vehicle.

Learn more: Select vehicle by model (Dropdown), Workshop country (decides data region)

There is no setting for it in the app. If you chose the wrong country, contact support and we will change it for you.

Learn more: Workshop country (decides data region)

Accounts in the US and the UK use imperial units (miles); all others use metric. Diagnosis answers and the chat follow the same units.

Learn more: Sign up for free, Ask WrenchLane vehicle chat (one chat per car)

No. The checklist, guided tours, sample case and onboarding reward are available in the 32 European countries only.

Go to Menu, Profile, Close account and confirm with Yes, close my account. You are signed out right away, and the support team confirms by email before deleting your data, usually within a few business days.

Learn more: Close account

Since 15 September 2026 diagnoses run on an AI model processed in the EU.

Learn more: Possible causes ranked by probability and severity

Only you. Each mechanic's diagnostics and history are saved to their own login, so colleagues in the same workshop do not see your diagnostics, History or service reports, and only the user who created a diagnosis can complete it.

Learn more: Diagnostic history: ongoing and completed diagnostics per car, History (vehicles and saved work)

They are built from anonymised, aggregated diagnostics run in WrenchLane; no workshop, customer or vehicle can be identified. Each fault code page shows how often the code was seen across those diagnostics and in how many separate workshops.

Learn more: Fault code pages on wrenchlane.com (fault-code cluster)