Almost every new car sold in Britain has a turbo on it now, including small petrol engines that would once have been normally aspirated. That has made a four-figure repair into a mainstream one. Here is what a turbocharger costs to replace, how to spot one going, and the mistake that destroys the new one.
| What you are paying for | Typical range |
|---|---|
| Parts — turbocharger unit and gaskets | £380 – £950 |
| Labour — 4 to 7 hours at £100/hr | £400 – £700 |
| Typical total | £780 – £1,650 |
Independent garage rates. Twin-turbo engines are roughly double. See the full list in our Repair Costs Hub.
How much does a new turbo cost?
Most cars land between £780 and £1,650 fitted at an independent garage. A small petrol turbo on a supermini can come in around £700. A variable-geometry diesel turbo on a large car, or anything where the turbo sits under the engine and the subframe has to come down, pushes towards £2,000.
If your car has two turbos, budget for roughly double. Sequential and twin-scroll setups on six-cylinder engines are a different conversation again, and a main dealer quote on a premium car can be several times the figures above.
There is a middle option people often do not know exists: a reconditioned turbo from a specialist, rebuilt with new bearings and seals and balanced, typically with its own warranty. On an older car it can halve the parts cost. Ask whether the garage will fit a customer-supplied recon unit, and what they will guarantee if they do.
What the symptoms sound like
A failing turbo is one of the more audible faults on a car:
- A whine or siren under acceleration that rises with the boost. Worn bearings. This is the classic one.
- Blue smoke, especially on a trailing throttle or after idling. The turbo is passing oil through failed seals and the engine is burning it.
- Sudden loss of power, or limp mode. Often the variable-geometry vanes sticking rather than the turbo itself — worth diagnosing before anyone condemns the unit.
- Oil in the intake pipework when the intercooler hose is pulled off.
- A rattle or whistle at idle that was not there last month.
Loss of power with a stuck vane mechanism can sometimes be freed and recalibrated for a fraction of a replacement. It is worth asking the question before agreeing to a new turbo.
Why turbos fail
Three causes account for most of them, and two are preventable.
Oil starvation. A turbo spins at over 100,000 rpm on a film of oil measured in microns. Late oil changes, the wrong grade, a blocked feed pipe or a low oil level and the bearings go. This is the biggest single cause, and it is entirely in the owner's hands.
Carbon and soot. Short journeys, a clogged EGR valve and a diesel that never gets warm coat the vane mechanism until it sticks. Related to the same short-trip problem that ruins a DPF.
Debris. Something comes through the intake or back from the engine and damages the wheel. Rarer, and usually a symptom of something else having failed first.
The mistake that kills the replacement
This is the paragraph worth reading twice.
When a turbo fails, it usually leaves debris and oil behind it. If the oil feed and return pipes are not cleaned or replaced, and the intercooler is not flushed of the oil sitting in it, the new turbo is fed the same contaminated oil and runs against the same restriction. It will fail again, sometimes within weeks.
A proper turbo job therefore includes new oil and filter, a new or cleaned oil feed pipe, a cleaned or replaced return pipe, and the intercooler flushed or swapped. A cheap quote that leaves those out is not a saving — it is the same bill again a few months later.
When you compare quotes, compare what is on them. "Supply and fit turbo £750" and "supply and fit turbo, oil and filter, feed and return pipes, intercooler flush £1,100" are not the same job, and the dearer one is usually the cheaper one.
Is a turbo covered by a warranty?
Yes — a turbocharger is a covered component on most levels of independent cover, and it is one of the failures these policies genuinely exist for. It is not a wear item like a clutch or a set of pads.
Two things decide whether a specific claim is paid.
Service history. Because oil starvation is the commonest cause, an assessor will want to see that the oil has been changed on schedule with the right grade. This is the single most common reason a turbo claim is refused, and it is avoidable: keep the invoices.
Whether it was already failing. A whine that was there before the policy started is a pre-existing fault, and no warranty covers those. If you are hearing something, get it diagnosed now rather than after you have bought cover.
Worth knowing too: if the turbo failure has damaged something else — oil starvation reaching the bearings, for instance — whether that follow-on damage is met depends on your policy's position on what isn't covered. It is a question worth asking before you need the answer.
How to make a turbo last
- Change the oil on time, with the right specification. Nothing else on this list comes close.
- Let it warm up. Drive gently for the first few minutes rather than using full boost on cold oil.
- Let it cool down. After a hard run or a motorway journey, a minute of idling lets oil keep circulating through a very hot bearing housing. Switching off immediately bakes the oil in there.
- Give a diesel a proper run regularly. Short trips are what coat the vanes.
- Fix boost leaks and EGR faults promptly. A turbo working against a fault works harder.
ClearPath takeaway
Budget £780 to £1,650, more for twin turbos or a premium car. Ask whether the quote includes the oil, the feed and return pipes and an intercooler flush — if it does not, ask why.
A turbo is properly covered by warranty, which makes it one of the better arguments for having cover on a modern turbocharged car. Keep your servicing invoices, because that folder is what decides a turbo claim more often than anything else.
ClearPath pays up to £3,000 a claim with a £100 excess, at an independent garage labour rate of £100 an hour.
