When the repair costs more than the car: what to do with a dead engine

Author: Vladislav Moisejev·Updated 05.10.2026

A woman came to us with an Audi A5. The workshop had quoted her 9,000 euros for an engine replacement with the work that goes around it. At that figure the question “repair or sell” answered itself — she was looking for someone to take the car as it was.

The case is an ordinary one, and it usually ends the same way: the owner spends weeks looking for a buyer, the ad sits there, and the only calls are from traders quoting scrap money. Here is why it goes like that, and what to do about it.

When a repair stops making sense

The number to work out is not “what does the repair cost” but “what is the car worth afterwards”. Those are two different things.

Take the price the same car sells for in running order. Subtract the cost of the repair. If what remains is small or goes negative, you are repairing the car for yourself, to keep driving something familiar. That is a perfectly reasonable decision, but it is spending, not investing.

Worth noting separately: a car does not gain value from a new engine. “New engine” in an ad barely moves the price, because a buyer judges the year, the mileage and the state of the body, and takes repair histories with a pinch of salt.

A worked example

The figures here are illustrative, so put your own in: take the price from listings for the same car in running order, and the repair cost from the workshop’s quote.

In the left column you pay €9,000 for a car that is still worth €8,000 once it is fixed. In the right one those €8,000 stay with you and the outlay is €1,500. The difference is not whether the repair is expensive or cheap, but what the car you end up with is worth.

Then there is a third route the table leaves out: selling as it stands. You pay nothing, you take the money on the day, and you carry none of the risk that opening the engine adds to the job. The figure will come in under €8,000 — by exactly the repair cost and the risk the buyer takes on.

The rule is simple: work out not what the repair costs, but how much is left in the car after it. If that goes negative or near zero, the repair only makes sense when you plan to keep driving the car yourself.

Why private buyers avoid a car with a dead engine

An ordinary buyer is looking for a car they can get into and drive. They are not comparing yours against other broken cars, but against running ones at the same money plus a couple of thousand.

To them your car is a project: find a workshop, agree the timing, source an engine, and accept the risk that something else surfaces along the way. Most people will not take that on, even when the arithmetic looks good on paper. That is why ads with a failed engine sit for months while the price slides down.

There is also the matter of getting it there. The car does not drive, so it needs a tow truck, and the buyer prices that in.

Three ways to go

Repair it

Worth it if you like the car, the body is sound and you are ready to drive it for several more years. The cost then spreads across those years and starts to look sensible.

What gets in the way: the money leaves in one go, and nobody guarantees the rest of the car. On a high-mileage vehicle the gearbox or the suspension often follows the engine.

Break it for parts

Sold piece by piece, the total sometimes beats what the whole car would fetch.

What gets in the way: it is months of work. You need space, time and a buyer for every part, and the shell still has to go somewhere and come off the register.

Sell it as it stands

A buyout company takes the car in the state it sits in, collects it themselves and handles the ownership change on the day.

What gets in the way: the price is lower than if you spent months finding someone willing to take on the repair. That is what you pay for speed and for having the matter closed at once. We went through why buyout prices sit below market in a separate article.

Why we take on cars like this

The answer is simple: we have our own places to do the work, and it costs us less than it costs a customer at a workshop. Where an owner is quoted 9,000 euros for a full engine replacement, our outlay is markedly lower, and that gap is what makes the deal work.

The risk does not go away. Until the car is opened up nobody knows the real figure, and stripping an engine sometimes adds to the job. We take that risk knowingly, and we quote with it in mind, because otherwise there is no deal to be had.

The Audi A5 is still in progress: we bought the car, and it is too early to say how the repair will end.

What sets the price of a broken car

• what exactly has failed — engine, gearbox or electronics — and whether a workshop has confirmed the diagnosis;
• the condition of the body and interior, since that is what remains after the repair;
• the specification and demand for the model: parts for some cars move instantly, for others they sit for years;
• whether the car drives or has to be towed away;
• the documents and the service history.

If you are weighing up what to do with a broken car right now, write to us. We give you a figure the day you get in touch, and we cover the collection and the paperwork. More on the buying broken cars page.