DATA-BACKED GUIDE · UPDATED JULY 2026
How much does an exhaust repair cost in the UK?
Exhaust costs cover everything from a cheap rear silencer to a full system with a catalytic converter, so the range is enormous. Often only the section that has failed needs replacing, not the whole thing. The real prices on this page are what drivers actually paid, which helps when a garage quotes for the lot rather than the bit that's actually gone.
The quick version
- Exhausts are usually replaced in sections, so you may only need the part that has failed, not the whole system.
- A rear silencer is a cheap fix; a catalytic converter or DPF is a far bigger one, because of the metals inside.
- A blowing exhaust is a common MOT failure, so it is worth sorting before the test rather than paying for a fail and a retest.
- Fitting is quick where bolts come apart cleanly, but rusted joints add labour time and cost.
- Aftermarket exhaust sections are widely available and cost less than OEM on most cars, without the garage having to order in a dealer part.
- Ask which section has actually failed before you agree to a full system quote. A mid-section swap and a full replacement are very different jobs.
Published and surveyed prices
Where these 5 prices come from — 3 named sources
Each is a published price list, an official survey, or a receipt/quote a reader shared. The full per-price list with year and area is on the exhaust page.
Why the price varies so much
Exhaust prices vary enormously because the system has several parts at very different price points, and which one has actually failed is the biggest single factor in what you end up paying. A back box or a straightforward section of pipe is cheap. A mid-section with a flexi joint costs more. A catalytic converter or diesel particulate filter sits in another league entirely, because of the precious metals inside that do the work of cleaning the exhaust gases; that's also why cats get targeted by thieves. Labour is the second big variable. Where the joints come apart cleanly it's a quick job, but seized, rusted bolts on an older or high-mileage car can turn a straightforward swap into something that takes much longer and costs more in labour alone. Parts choice moves the price too: OEM parts from a dealer cost more than a quality aftermarket equivalent, and most independent garages are happy to fit aftermarket where it does the same job. Finally, who does the work matters. A franchised main dealer will typically quote above an independent garage or a dedicated exhaust specialist for the same parts and the same labour, partly because of overheads and partly because dealer labour rates are simply higher.
How to pay less
- Get quotes on WhoCanFixMyCar or BookMyGarage, since exhaust prices vary a lot by section and garage, and a second quote can expose an inflated one.
- Ask whether only the failed section needs doing rather than the whole system. A garage that quotes for a full system without explaining why is worth questioning.
- Choose a quality aftermarket section over OEM where the garage is happy with it. It fits the same and does the same job for less.
- Sort a blowing exhaust before the MOT to avoid a fail and a retest charge on top of the repair itself.
- Use an exhaust specialist or a good independent instead of a main dealer for the labour saving. Exhaust work is routine for them, not a diagnostic puzzle.
- If a cat or DPF has been diagnosed as faulty, get that diagnosis confirmed rather than taking one garage's word for it. It's one of the dearer jobs, so a second opinion is worth the phone call.
Common questions
Do I need to replace the whole exhaust?
Usually not. Exhausts are made in sections, so often only the part that has corroded or split needs replacing, whether that's the back box or a mid-section. Ask the garage to confirm which section has actually failed before agreeing to a full system, which is a much bigger cost.
Will a blowing exhaust fail an MOT?
It can, yes. An exhaust that is leaking, excessively noisy or has a failed catalytic converter is a common MOT failure. If yours has started to blow, get it looked at before the test so you're not paying for a fail and then a retest on top.
Why are catalytic converters so expensive?
Because they contain precious metals like platinum and palladium that do the actual work of cleaning the exhaust gases, and those metals are costly. That's also why cats are targeted by thieves. A failed cat is one of the dearer exhaust jobs, so it's worth getting the diagnosis confirmed before replacing it.
Is aftermarket as good as an OEM exhaust part?
For most cars, a quality aftermarket section does the same job as the original part and fits the same bolt pattern, for less money. The main reason to stick with OEM is if you want an exact factory finish or the car is still under warranty and the dealer insists on it. Ask your garage what they'd fit on their own car.
Why does one garage quote so much more than another for the same job?
Labour rates differ a lot between a main dealer, an independent garage and a specialist, and that difference shows up directly in an exhaust quote since parts are only part of the bill. Rust and seized bolts can also push a quote up if one garage has actually looked underneath and another has quoted blind. Getting more than one quote, ideally after the car's been on a ramp, is the only way to know if a price is fair.
Can I drive with a blowing exhaust?
Short distances, yes, but it's not something to leave. A blowing exhaust gets louder and can let exhaust fumes into the cabin if the leak is near the front of the car, and it will fail an MOT. Getting it diagnosed early often means a smaller, cheaper repair than waiting until the whole section has rotted through.