This is going to get pricey? Nah, you'll fix it yourself.

Enter your registration number and symptom for an honest step-by-step plan and the right parts. Too tricky? We'll tell you that too.

Easy Medium Garage work
Dat Wordt Duur car diagnosis app: diagnosis screen with likely causes and difficulty level per repair

How it works

Fix your own car in four steps.

datwordtduur.nl is a car diagnosis app based on your registration number and symptom. No technical jargon, no guesswork: the app thinks along like a good mechanic who explains things calmly.

01

Enter your registration number

We instantly know the make, model and year. Enter it once, we'll remember it after that.

02

Describe what you notice

Type in what you notice. "oil light is on" or "ticking sound at the front left" is enough.

03

Get an honest diagnosis

The likely causes of your problem, each with a difficulty level: easy, medium, or garage work.

04

Fix it yourself

Follow the step-by-step plan with exactly the tools mentioned and the right parts included.

Why datwordtduur.nl

An honest car diagnosis. Honest about your wallet.

Save on the garage

Many problems you can fix yourself for a few euros. Afterwards you see in black and white what you saved.

Honest about what you shouldn't do yourself

Know your limits. Does the diagnosis come back red? Then the bonnet stays shut. This is garage work.

Made for dirty hands

Big text, high contrast, one thumb. Easy to read in bright sun and in a dark garage.

Frequently asked questions

Questions about car diagnosis and DIY repair.

How much does a car diagnosis cost at a garage?

A diagnostic check at a garage can easily cost €50 to €100, before any repair, and you often pay that before knowing whether the problem is big or small. With datwordtduur.nl you get a free first car diagnosis based on your registration number and symptom, and see right away whether you can fix it yourself. You enter your registration number and a short description of the problem; the app combines that with the make, model and year and gives you the most likely causes, each with a difficulty level: easy, medium or garage work. If it turns out to be a garage job after all, you know that upfront and haven't spent anything finding out. If it's a DIY fix, you get the step-by-step plan and the right parts straight away.

Can I diagnose my car without an OBD reader?

Yes. You don't need to plug your car in for a scan, and you don't need an OBD reader or scan tool: you describe what you notice ("ticking sound at the front left", "engine light is on") and the app combines that with the make, model and year behind your registration number into an honest diagnosis.

How do I recognise a fault with my car?

You don't need to know the cause yourself. Describe what you see, hear or smell, and the app translates that, together with your car's details, into the most likely causes and a step-by-step plan. That way you catch car problems early, before they get expensive.

Which car repairs can I do myself?

A lot of basic maintenance is easy to do yourself: bulbs, wiper blades, the battery, filters, and on many models brake pads or sensors too. Every diagnosis gets a difficulty level (easy, medium or garage work), so you know what you're getting into beforehand.

Is the car diagnosis app free?

Yes, you start for free with 1 analysis per week, 1 saved registration number, and you see the most likely cause, enough to get to know the app and diagnose your first problem without paying anything. Want to analyse more often, keep track of multiple cars, or see all possible causes? DIY is €3.99 per month: unlimited analyses, 5 saved registration numbers and all possible causes visible. Both free and paid use the same honest diagnosis and the same step-by-step plan. There's no lock-in; you can cancel any time. Payments run through Stripe, so your card details never reach us.

Which car brands does the diagnosis work for?

For all makes and models with a Dutch registration number. Your registration number tells us the make, model and year; the diagnosis and step-by-step plan are tailored to that.

Is there an app for iPhone or Android?

The web app already works on any phone via app.datwordtduur.nl. Apps in the App Store and Google Play are coming soon, with the same diagnosis and the same account.

Get started with your registration number.

Diagnosis within a minute.