Exhaust · 2026
Audi A5 exhaust cost
An exhaust mid-section on a Audi A5 typically costs £123–£428 fitted at a UK independent garage, with a full system around £271–£942. Mechanically an A4 underneath — twin rear boxes, flap-rattle false alarms — with one genuinely notable fact: the A5's 2.0 petrol was among the first cars in Europe fitted with a petrol particulate filter, from mid-2017, so emissions symptoms on those cars need GPF-aware diagnosis.
Emissions hardware
Diesels carry DPFs across both generations, with B9 cars adding AdBlue/SCR. The notable one: the A5's 2.0 TFSI petrol was one of the first two VW Group applications of the petrol particulate filter, fitted from June 2017 — earlier than most of the market — so restricted-flow or emissions symptoms on post-2017 petrol A5s may be GPF-related, not cat or lambda.
What's on a Audi A5 exhaust?
As per the A4: longitudinal engine, downpipe/cat (or cat + DPF), centre silencer, then twin rear silencers — with quad exits on S line and S5 systems. Some aftermarket cat-backs are sold as shared B8 A4/A5 fitments. Twin rear boxes raise parts cost, and heat-shield fixings suffer the platform's documented bimetallic corrosion.
Audi A5 exhaust replacement cost
A mid-section — the most common failure point — typically costs £123–£428 fitted at a UK independent garage, and a full system around £271–£942. If several sections are corroded, replacing the lot is often cheaper than doing them one MOT at a time. The catalytic converter is a separate, much pricier part.
Key things to know
- Downpipe flexi vibration is described by owners as a common A5 fault — a weak flexi lets the downpipe rattle at specific revs.
- Exhaust and tunnel heat-shield rattles — including fixings lost to aluminium-on-steel corrosion — are a recurring owner theme, and some never find a permanent fix. Isolate before replacing silencers.
- Post-June-2017 petrol cars carry a GPF — genuinely early adoption, and a diagnosis trap for garages expecting a plain cat.
- Exhaust flap rattle shares the A4's failure modes: vacuum lines and springs before silencers.
Good question
Questions Okay gets asked a lot
How much does an exhaust cost for a Audi A5?
+
Expect £123–£428 fitted for the mid-section — the most common failure point on UK cars — and around £271–£942 for a full system (cat-back) at a UK independent garage in 2026. The catalytic converter is a separate, much pricier part and isn't included in these figures. Stainless-steel systems cost more upfront but last three to four times longer than mild steel. Use our cost calculator to adjust for your region.
Does my petrol Audi A5 have a particulate filter?
+
If it was built from mid-2017 onwards, yes — and unusually early. Audi's 2.0 TFSI in the A5 was one of the first two engines in the entire VW Group to receive a petrol particulate filter, from June 2017, well before most manufacturers fitted them. It matters for two reasons: a GPF can clog on short-journey cars just like a diesel DPF (sustained runs keep it clear), and emissions or restricted-flow symptoms on these cars need a garage that thinks 'particulate filter', not just 'catalyst and lambda sensors'. If you're unsure of your build date, the registration or VIN settles it.
How do I know the exhaust is going on a Audi A5?
+
The classic signs: a deepening, louder engine note (blowing from a corroded section or failed joint), rattling over bumps (broken hangers or internal baffles), and a metallic tinkling on start-up. A sudden loud roar usually means a section has let go completely. At the MOT, a leaking exhaust is a failure and surface corrosion is a common advisory — an advisory on an exhaust section usually becomes a failure within a year, so it's worth pricing the work when the advisory appears rather than waiting.
Get a price for your Audi A5
Estimate the exhaust cost for your car and region, then compare quotes from trusted local garages.