Citroen C1 Exhaust System: Specs, Fitment & Common Faults
On the C1, a genuinely honest fact: the DPF additive never burns off, meaning even excellent driving habits can't prevent an eventual, expected filter service.
Illustration for editorial purposes
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OEM Part Number: 9672883980 (catalytic converter) — rear silencer (aftermarket) Bosal 190-179 / Walker 71213
| Rear silencer (back box) — aftermarket | Bosal 190-179 (extra fitting parts needed); Bosal 190-363 (extra fitting parts needed); Walker 71213 (code letter 52, filled, 810 mm); Walker 23289 (code letter 62, 640 mm); Walker 17166 (code letter 52, 610 mm); MTS 01.61099 (900 mm); Vegaz PGS-129 |
|---|---|
| Centre / intermediate silencer — aftermarket | Bosal 135-371 (see accessories list); Walker 28832 (code letter 52, 930 mm, no fitting parts); Walker 01489 (code letter 52, 750 mm); MTS 01.50240 (1060 mm); Ernst 515047 (930 mm, repair solution); Vegaz PGS-118 (centre, 750 mm); Polmo 07.157 |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | or DPF: Bosal 090-171 (Euro 5/6, not 6c/6d, with fitting parts); Bosal 090-309 (Euro 6.2); Walker 28727 (code letter 91, 500 mm, with fitting parts); Vegaz PGK-805QP (Euro 5/6, 490 mm, OBD); Vegaz TK-871 (Euro 5/6, front, 395 mm); BM Catalysts BM92266H (ceramic, Euro 6, with FK92266); JMJ 1091651 (500 mm) |
| Genuine (OE) numbers quoted | Citroen/Peugeot 9672883980 (three-way catalytic converter, Euro 6). NAP CAK10133 lists engine codes HMZ (EB2F), ZMZ (EB0), HMU (EB2D), HMY (EB2M). |
| Fitment notes | All petrol. |
A Genuinely Important, Honest Fact: Good Driving Habits Alone Won't Prevent Eventual DPF Service — Citroen C1 Exhaust System
It's worth knowing something distinct from the usual "just drive faster to regenerate" advice: diesel particulate filters on this platform rely on an additive (commonly referred to as Eolys, or cerine) injected into the fuel to help the trapped soot burn at a lower temperature during regeneration. This additive itself, however, never burns off — it accumulates as a genuine ash residue inside the filter permanently, regardless of how well the car has been driven. This means even a diesel driven mostly on motorways with excellent regeneration habits will eventually need the DPF professionally cleaned or replaced simply due to this ash buildup, typically somewhere in the region of 100,000-120,000 miles — this isn't a fault or a sign of poor maintenance, but a genuine, expected part of diesel particulate filter technology.
If you're chasing a specific EGR-related fault, real fault codes worth knowing include P0401 (insufficient EGR flow) and P0405 (EGR position sensor signal fault) — worth mentioning to whoever is diagnosing the car, since these point toward different specific parts of the system.
Citroen C1 Exhaust System: The Part That Announces Its Own Problems
On the Citroen C1, 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.
Citroen C1 Exhaust System: Watch: Replacing It
C1/107/Aygo shared platform. Alt: https://www.youtube.com/watch?v=MbswzQifvl0 (full system), https://www.youtube.com/watch?v=IvV8DbKlh8Y (box only). Not confirmed as 2014+ Mk2.
Citroen C1 Exhaust System: What It Does
On the Citroen C1, 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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Citroen C1 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 Citroen Exhaust System
The same part, covered across other Citroen models.