Vauxhall Corsa Exhaust System: Specs, Fitment & Common Faults
If your Corsa is diesel-engined, a blocked DPF is worth addressing promptly — here's the cascading chain reaction that follows if it's left too long.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — Rear silencer (aftermarket) Bosal 185-189 / Walker 23375
| Rear silencer (back box) — aftermarket | Bosal 185-189, 185-683, 185-233, 185-685, 185-687, 185-431, 185-621, 185-615; Walker 23375 (1050mm), 22477 (700mm), 70308, 22475 (680mm); Izawit 21.902, 21.905, 21.188, 21.011, 21.801, 21.047; Vegaz OS-477 (690mm); Polmo 17.584 |
|---|---|
| Centre / intermediate silencer — aftermarket | Bosal 278-135, 200-825, 200-269; Vegaz IS-110, OS-278, RS-318; Polmo 21.282; Izawit 21.087, 21.070 |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | Bosal 090-199, 090-198 (Euro 5/6); Walker 28760 (275mm), 28819 (450mm); Vegaz OK-332, OK-332QP (370mm), OK-342QP (520mm) |
| Genuine (OE) numbers quoted | 5852595 (Izawit 21.087 middle) |
| Fitment notes | Corsa rear silencers appear model-specific (many Bosal 185-xxx); no twin-exit/VXR split. |
If Your Corsa Has a Diesel, This Cascading Failure Chain Is Worth Knowing
If your car has a diesel engine, it's worth understanding what a blocked DPF (Diesel Particulate Filter) can lead to if left unaddressed rather than acted on promptly. A blocked filter doesn't just trigger a dashboard warning — sustained excess backpressure in the exhaust system can force its way back to the turbocharger, causing what's known as "backspin," which can damage the turbo's internal seals. Once those seals fail, oil can leak into the EGR (exhaust gas recirculation) system too, compounding what started as a single, more straightforward fault into a considerably more expensive combined repair.
Vauxhall Corsa Exhaust System: The Part That Announces Its Own Problems
On the Vauxhall Corsa, most faults are things you'd spot visually first, but this one usually announces itself acoustically — a rattle, a drone, a noticeable jump in noise levels. That's actually helpful, since it means you'll likely notice trouble well before it gets serious.
Vauxhall Corsa Exhaust System: Watch: Replacing It
Back box replacement. The search for a Corsa E video was blocked by the search limit.
Vauxhall Corsa Exhaust System: What It Does
Three jobs happen inside the Vauxhall Corsa's exhaust system: routing burnt gases away from the engine, quieting them through the silencer, and treating emissions via a catalytic converter and particulate filter. Petrol and diesel variants often need completely different systems to meet their respective emissions requirements.
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Vauxhall Corsa Exhaust System: Warning Signs, DIY Difficulty & Aftermarket Advice
These are the same regardless of make or model — see our full Exhaust System Guide for warning signs and fault codes to watch for, confirming fitment against your VIN, and which aftermarket brands are worth trusting.
More Vauxhall Exhaust System
The same part, covered across other Vauxhall models.