Peugeot 308 Exhaust System: Specs, Fitment & Common Faults
A genuine warning worth knowing: DPF deletion is illegal and can be genuinely dangerous — one real case saw exhaust gas smell in the cabin after blocking the EGR to compensate.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — Rear silencer (aftermarket) Bosal 135-709 / Walker 23534
| Rear silencer (back box) — aftermarket | Bosal 135-709, 135-093, 190-509 (accessories needed); Walker 23534 (770 mm, code 52), 23424 (790 mm), 23422 (800 mm), 23289 (640 mm, code 62), 71213 (810 mm), 21884 (680 mm), 21993 (820 mm); Vegaz PGS-246 (830 mm), PGS-458, CS-266; MTS 01.61103 (1070 mm), 01.65280 (800 mm), 01.97490 (800 mm), 01.61331 (950 mm), 01.67420 (730 mm). |
|---|---|
| Centre / intermediate silencer — aftermarket | Bosal 135-465 (needs accessories); Walker 01489 (750 mm); Vegaz PGS-118, PGS-118IMA, FTS-342, FTS-325; MTS 01.80750, 01.57810; Polmo 07.157, 07.07; Ernst 515047 (930 mm); Hella 8LC 366 kits. |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | Bosal 090-171 (Euro 5/6, not 6c/6d), 090-263 (Euro 6, with fittings); Walker 28168 (420 mm, with fittings); NAP CAK10133 (Euro 6, engine codes HMZ EB2F, ZMZ EB0, HMU EB2D, HMY EB2M), CAK10515 (Euro 5, EP6CDT / N18B16A); JMJ 1091651 (500 mm); BM Catalysts BM91784H (Euro 5, FK91784), BM91785H (Euro 6, FK91785), BM92266H (Euro 6); AS 15797D; EEC CI6088T (490 mm), CI6090T |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine parts against your VIN |
| Fitment notes | Match engine code, fuel and emissions standard. |
A Genuine Warning Worth Knowing: DPF Deletion Is Illegal and Can Be Genuinely Dangerous — Peugeot 308 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, without needing professional intervention. If the "anti-pollution fault" message appears alongside a sudden loss of power, the car has entered limp mode as a protective measure — this is worth addressing promptly rather than continuing to drive on it, since limp mode is the car's way of limiting further damage while genuinely needing attention.
Peugeot 308 Exhaust System: The Part That Announces Its Own Problems
On the Peugeot 308, this is one of the few parts where your ears will catch a problem before your eyes do — a new rattle, a drone, noise that simply wasn't there a week ago. That's a genuine advantage, since it gives you an early warning most other faults don't offer.
Peugeot 308 Exhaust System: Watch: Replacing It
T9 exhaust mounting/hanger work; second option https://www.youtube.com/watch?v=sFj5Xj7-5qw (Fix Your Peugeot 308 T9 Exhaust Mounting for Cheap)
Peugeot 308 Exhaust System: What It Does
On the Peugeot 308, burnt gases leave the engine through the exhaust system, which quiets them via the silencer and treats emissions through a catalytic converter and particulate filter before anything exits the tailpipe. Petrol and diesel versions frequently use entirely different systems, since their emissions treatment needs aren't the same.
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Peugeot 308 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.