Peugeot 508 Exhaust System: Specs, Fitment & Common Faults
A genuine warning worth knowing on diesel 508s: DPF deletion is illegal and can be genuinely dangerous — one real case saw exhaust gas smell in the cabin afterward.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — Rear silencer (aftermarket) Walker 23164 / MTS 01.63790
| Rear silencer (back box) — aftermarket | Walker 23164 (720 mm), 13224 (730 mm), 21993 (820 mm), 21884 (680 mm), 21223 (660 mm), 17166 (610 mm); MTS 01.63790 (750 mm), 01.97490 (800 mm), 01.95790 (705 mm), 01.96340 (760 mm), 01.61331 (950 mm); Vegaz PGS-193, PGS-157 (700 mm), PGS-129; Polmo 19.198; No Bosal listed. |
|---|---|
| Centre / intermediate silencer — aftermarket | Bosal 135-465 (accessories); Walker 01489 (750 mm, code 52); MTS 01.80750, 01.57810; Vegaz FTS-342, FTS-325, PGS-118, PGS-118IMA; Polmo 07.157, 07.07; Ernst 515047. |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | Bosal 090-590 (Euro 4, E57 103R 000334), 090-255 (Euro 4/5/6, E19-103R-000053); Walker 28168 (420 mm), 28201 (550 mm, code 92), 28100 (330 mm, with manifold); Ernst 761031 (Euro 5/6, 625 mm, with kit); Vegaz CK-340 (Euro 6), CK-882 (Euro 5); NAP CAK10515 (EP6CDT, N18B16A); JMJ 1090124; BM Catalysts BM91925H, BM91990H |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine parts against your VIN |
| Fitment notes | Engines: 1.6 VTi/THP petrol, 1.6/2.0/2.2 HDi and BlueHDi, 2.0 HDi RXH Hybrid4. Mapping to engines not given except NAP CAK10515. |
A Genuine Warning Worth Knowing: DPF Deletion Is Illegal and Can Be Genuinely Dangerous — Peugeot 508 Exhaust System
If you're facing a costly DPF or EGR repair and have come across "DPF deletion" as a cheaper alternative, this is worth understanding properly before considering it: removing or gutting the DPF filter is illegal in the UK and will cause an automatic MOT failure once detected — testers now specifically check for this. Beyond the legal risk, it's worth knowing about a genuinely concerning real case: one documented DPF deletion also involved the EGR valve being blocked to allow only fresh air intake, after which the owner began smelling exhaust gas inside the cabin while driving — a real, potential carbon monoxide exposure risk, not just an unpleasant smell. Whatever the cost pressure, a genuine repair rather than a deletion is worth pursuing given both the legal exposure and this kind of real safety risk.
A blocked DPF is overwhelmingly a short-journey problem — sustained motorway driving at around 60mph for at least 15 minutes allows a mildly blocked filter to complete a regeneration cycle and clear the fault naturally. If an "anti-pollution fault" message appears alongside a sudden loss of power, the car has entered limp mode as a protective measure — worth addressing promptly rather than continuing to drive on it.
Peugeot 508 Exhaust System: The Part That Announces Its Own Problems
Where a lot of Peugeot 508 parts fail silently until you spot something visually wrong, this one tends to make noise first — a rattle, a drone, an audible change that wasn't there recently. That's a useful early-warning system if you're paying attention.
Peugeot 508 Exhaust System: Watch: Replacing It
Came up for a 508 rear-silencer query but the title is generic, so the car is not confirmed from the title
Peugeot 508 Exhaust System: What It Does
Away from the engine, through the silencer, and often through a catalytic converter and particulate filter before reaching the tailpipe — that's the Peugeot 508's exhaust job in three steps. Petrol and diesel versions frequently need different systems entirely, since their emissions treatment isn't the same.
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Peugeot 508 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 Peugeot Exhaust System
The same part, covered across other Peugeot models.