Vauxhall Zafira Tourer Exhaust System: Specs, Fitment & Common Faults
If your Zafira Tourer is diesel-engined, a blocked DPF is worth addressing promptly — here's what genuinely happens if it's ignored.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — Rear silencer (aftermarket) Bosal 185-645 / Walker 72377
| Rear silencer (back box) — aftermarket | Bosal 185-645, 185-197, 185-647, 185-131, 185-601, 185-479 (accessories list needed); Walker 72377 (920 mm), 72376 (900 mm), 23824 (800 mm), 23154 (790 mm) (all filled, no fitting parts); Vegaz OS-625, OS-537, OS-689; Izawit 21.138 (900 mm), 21.149 (850 mm), 21.183; Polmo 17.625. (Izawit 21.247 shows 2003-2005 build years, ignore.) |
|---|---|
| Centre / intermediate silencer — aftermarket | Bosal 200-825, 200-269, 278-135 (accessories list); Vegaz IS-110 (centre), OS-278 (990/1020 mm), RS-318 (720 mm); Polmo 21.282; Izawit 21.087 (850 mm, OE 5852595 quoted), 21.070 (centre); No Walker. |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | Bosal 090-199 (Euro 5/6, not 6c/6d/6e, with fitting parts), 090-184 (Euro 5/6); Walker 28726 (300 mm), 28916 (325x300x250 mm); Vegaz OK-340 (engine A16XER, 450 mm), OK-332 / OK-332QP (OBD, 370 mm); BM Catalysts BM91720H (only with FK91720, non-approved); Also Ridex 429C0132 and Stark SKCCT-4840131 are diesel (450 mm, Euro 5/6); Hella 8LE 366 052-041 Euro 6. |
| Genuine (OE) numbers quoted | Izawit 21.087 cross-refs OE 5852595 (middle silencer); otherwise none quoted |
| Fitment notes | Engines 1.4, 1.6 SIDI, 1.6 CNG, 1.6 CDTi, 2.0 CDTi |
A Genuine Cascading Failure Chain Worth Knowing on Diesel Models — Vauxhall Zafira Tourer Exhaust System
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 Zafira Tourer Exhaust System: The Part That Announces Its Own Problems
On the Vauxhall Zafira Tourer, sound is usually the first clue here, ahead of any visual sign — a rattle, a drone, noise that's crept in gradually or arrived overnight. It's one of the more forgiving faults in that sense, since your ears will likely flag it before it becomes a bigger problem.
Vauxhall Zafira Tourer Exhaust System: Watch: Replacing It
Exhaust replacement for MOT; Zafira B videos also exist.
Vauxhall Zafira Tourer Exhaust System: What It Does
The Vauxhall Zafira Tourer's exhaust system handles three things at once: clearing burnt gases from the engine, cutting noise via the silencer, and treating emissions through a catalytic converter and particulate filter. Because petrol and diesel emissions requirements differ, it often uses genuinely different exhaust systems depending on engine type.
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Vauxhall Zafira Tourer 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.