Peugeot 2008 Exhaust System: Specs, Fitment & Common Faults
A genuine warning worth knowing on diesel 2008s: DPF deletion is illegal and can be genuinely dangerous — one real case saw exhaust gas smell in the cabin afterward.
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OEM Part Numbers
A Genuine Warning Worth Knowing: DPF Deletion Is Illegal and Can Be Genuinely Dangerous
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.
The Part That Announces Its Own Problems
Unlike a lot of the parts on this site, this is one where you'll usually hear the fault before you see it — a rattle, a drone, a sudden increase in noise that wasn't there last week. That's actually useful, since it gives you a head start on catching problems early.
What It Does
The exhaust system channels burnt gases away from the engine, reduces noise through the silencer, and on most modern cars, treats emissions through a catalytic converter and particulate filter before gases exit the tailpipe. Petrol and diesel versions of the same model often use entirely different systems due to different emissions treatment requirements.
Fitment & Compatibility
Exhaust systems differ substantially between the petrol, hybrid and plug-in hybrid versions of the 2008, since the hybrid versions integrate differently with the electric motor's contribution to deceleration. Always confirm the exact part fitted to your specific engine and powertrain combination before ordering. Whether you're sourcing a replacement exhaust system for your Peugeot 2008 from a dealer, specialist, or online marketplace, always check compatibility against your registration or VIN before buying.
Common Faults
Symptoms of Failure
- Rattling noise, especially on startup — often a loose or corroded heat shield rather than the exhaust pipe itself, though worth checking both.
- Noticeably louder engine noise — points to a hole or split somewhere in the pipe or silencer, typically caused by corrosion.
- Visible rust or flaking on the underside — a warning sign of corrosion that will eventually lead to a leak if left unaddressed.
- Failed emissions test — can point to a failing catalytic converter or particulate filter rather than the pipework itself.
DIY Replacement Difficulty
Replacing a full exhaust system is a moderate-to-difficult DIY job requiring access to raise the car safely and often penetrating oil to free corroded fixings. Catalytic converter and particulate filter replacement usually requires specific diagnostic equipment afterward to reset fault codes, making that portion of the job better suited to a garage. Expect 2–4 hours for a full system on a home ramp, or less at a garage with the right lift access.
OEM vs. Aftermarket
Reputable aftermarket exhaust systems are widely regarded as a safe, cost-effective alternative to OEM parts for the pipework and silencer sections. Catalytic converters and particulate filters are worth sourcing from well-regarded brands specifically, since counterfeit or substandard versions are a common cause of failed emissions tests and check-engine warnings.
More Peugeot Exhaust System Guides
The same part, covered across other Peugeot models.