Everything your mechanic is going to ask you (and you never remember)
You arrive at the garage, hand over the keys and the interrogation begins. “When was the last oil change?” “What oil does it take?” “Has the timing belt been replaced?” And there you are, staring at the ceiling, hoping the answer will magically appear.
Don’t worry — it happens to all of us. Most drivers have no idea when the last service was or what was actually done. The invoices are in a drawer somewhere, at best. At worst, they’re long gone.
The problem isn’t that you’re disorganised. The problem is that nobody has ever explained what information is worth keeping and how to have it accessible when you need it. Let’s fix that.
The questions they’ll always ask
Whether you’re going in for a routine service or because you’ve heard an odd noise, the mechanic needs context to do a proper job — and that context has to come from you. These are the most common questions:
Fluids and filters
When was the last oil change? What type of oil does it take (5W30, 5W40…)? Have the oil, air and fuel filters been replaced? Has the brake fluid and coolant been checked?
Oil and filters are the most basic part of maintenance, but also the easiest to forget because they’re done so often. Most manufacturers recommend an oil change every 15,000 km or once a year, whichever comes first. If you can’t remember when it was last done, the mechanic has to make a blind call on whether it’s due.
The timing belt
This is the big one. The timing belt has a long replacement interval (usually between 80,000 and 120,000 km or every 5 years) and if it snaps, it can destroy the engine. That’s why the mechanic always wants to know if it’s been changed and when.
The catch is that, precisely because it’s replaced every few years, it’s very easy to forget whether it’s been done. And guessing isn’t an option: if you can’t confirm it, many garages will recommend replacing it just to be safe. That’s a bill of 400 to 800 euros you might have avoided with a single invoice.
Brakes and tyres
When were the brake pads last changed? And the discs? Are the tyres the originals or have they been replaced? What pressure should they be at?
Brakes and tyres are direct safety components. Their wear depends heavily on driving style and mileage, so knowing the history helps the mechanic assess whether what they’re seeing is normal or a warning sign. And tyre pressure might seem like a minor detail, but running at the wrong pressure affects fuel consumption, wear and braking distance.
General history
Have there been any major breakdowns? Any recent repairs? Roughly how many kilometres does the car do per year? Any unusual noises, vibrations or behaviour?
These questions help the mechanic piece together the bigger picture. A car that does 30,000 km a year doesn’t wear the same way as one doing 8,000. And a past breakdown can be the clue that explains a current symptom.
What information you should always keep
You don’t need to be obsessively organised. Having these things to hand is more than enough:
For every service or check-up: the date, the mileage, exactly what was done (oil change, filters, pads…), what parts were used and the total cost, breaking down labour and parts if you can. If you also keep the garage invoice — scanned or photographed — even better.
For every repair: what was fixed or replaced, the date, the mileage and whether it was under warranty.
Basic vehicle details: make, model and year. It sounds obvious, but when you’ve got more than one car in the family it’s easy to mix up histories.
Recommended tyre pressure: it’s usually on a sticker inside the driver’s door or in the manual, but if you’ve got it noted alongside the rest of your car’s details, you save yourself looking it up every time you stop at the air pump.
The invoice drawer doesn’t work
Let’s be honest: keeping paper invoices in a drawer is the system everyone uses and nobody succeeds with. Invoices get lost, mixed up, damaged. And when you need them — at the garage, when claiming a warranty — they’re never where they should be.
The same goes for random photos on your phone. You end up with 300 pictures of invoices with no context, not knowing which one belongs to which service or which car.
What you need is a place where every service is recorded with its date, mileage, cost and attached invoice. Whether it’s an app, a spreadsheet or a well-organised folder in the cloud doesn’t matter. What matters is that it’s something you carry with you and can check in 10 seconds when the mechanic asks.
Start with the next service
You don’t need to reconstruct the entire history since you bought the car. Just start with the next time you visit the garage: note down the date, the mileage, what was done and save the invoice. After two or three visits you’ll have a solid base that saves you from the usual “I can’t remember”.
Your future self, standing in the garage with the mechanic waiting for an answer, will thank you.