Mini Clubman Exhaust System: Specs, Fitment & Common Faults
A genuinely frustrating, honest account on related models: a check engine light has returned after a cat replacement, with even a second replacement cat found faulty.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — Centre silencer (aftermarket) Bosal 105-109 / Walker 23031
| Rear silencer (back box) — aftermarket | NONE by named brand |
|---|---|
| Centre / intermediate silencer — aftermarket | Bosal 105-109, 233-577; Walker 23031 (380 mm), 28832 (930 mm), 21575 (790 mm); Ernst 250252, 177092; Vegaz MS-300, VS-111, VS-244AT; MTS 01.50577, 01.59790, 01.51350; Izawit 18.022; Polmo 01.104 (cat cars). |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | Walker 28948 (code 91), 28924 (code 92), 28100 (manifold, code 91); BM Catalysts BM92606H, BM92647H (Euro 6), BM91990H (Euro 5); Vegaz BK-315, BK-303, MOK-808; JMJ 1091654 (600 mm). |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine parts against your VIN |
| Fitment notes | Petrol and diesel lines listed (One to JCW; One D to Cooper SD) |
Mini Clubman Exhaust System: The Part That Announces Its Own Problems
On the Mini Clubman, 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.
Mini Clubman Exhaust System: What It Does
The Mini Clubman'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.
Mini Clubman Exhaust System: Watch: Replacing It
Aftermarket cat-back; weak
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A Genuinely Frustrating, Honest Real Account Worth Knowing — Mini Clubman Exhaust System
If a check engine light returns after a catalytic converter replacement, this is genuinely worth knowing: documented cases on related Mini models describe a warning light returning within weeks of a cat replacement, with a second replacement also found to be faulty, before the fault was properly resolved. It's genuinely worth knowing a replaced catalytic converter can itself be faulty straight out of the box.
It's also genuinely worth knowing a direct safety warning if working on the exhaust manifold or heat shield yourself: the battery should be disconnected first, since the alternator's live terminal nut is exposed and touchable in that area, creating a genuine risk of sparks and burns.
A Genuinely Important Clarification and a Genuinely Alarming DPF Finding — Mini Clubman Exhaust System
If a check engine light for a catalytic converter fault keeps returning despite replacement, this is genuinely worth knowing: a commonly cited root cause for this exact recurring pattern is that if a replacement catalytic converter isn't a genuine, like-for-like match to the original factory specification, this mismatch itself can cause the fault to keep recurring regardless of how many times the part is swapped.
It's also genuinely worth knowing a specific, honest account: one owner asked Mini directly about a driving technique intended to help maintain DPF health, only to be told Mini's own staff had no idea what this technique even was.
Mini Clubman 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 Mini Exhaust System
The same part, covered across other Mini models.