Ford C-Max Exhaust System: Specs, Fitment & Common Faults
A confirmed, major current Ford-wide recall covers DPF cracking on diesel C-Max models built 2014-2023 — check your registration before anything else.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — Rear silencer (aftermarket) Bosal 154-503 / Walker 21950
| Rear silencer (back box) — aftermarket | Bosal 154-503; Bosal 154-317; Bosal 154-481; Bosal 148-193 (accessories needed); Walker 21950 (530 mm, code 52, no tip); Walker 23975 (910 mm, code 52) |
|---|---|
| Centre / intermediate silencer — aftermarket | Bosal 145-001; Bosal 154-133 (accessories needed); Walker 22853 (980 mm, code 53, with pipe); Walker 22854 (980 mm, code 53); Walker 23210 (990 mm, code 62) |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | or DPF: Vegaz FK-336 (Euro 6); AS 20458 (Euro 5/6, 780 mm); Ernst 761086 (Euro 5, 805 mm); BM Catalysts BM92042H (Euro 6, with FK92042); RIDEX 429C0452 (Euro 5/6); JMJ 1091689 (engine codes IQDA, IQDB, MUDA, PNDA) |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine parts against your VIN |
| Fitment notes | Petrol and diesel at category level only; no Bosal or Walker converter shown. |
A Genuinely Major, Current Recall Worth Checking If You Have a Diesel — Ford C-Max Exhaust System
This is worth checking directly against your registration if you own a diesel C-Max: Ford has confirmed a major, current recall (reference 24E06, part of the broader KBA 14555R campaign) addressing a design-related weakness in the Diesel Particulate Filter material that can develop hairline cracks over its service life. This isn't a minor administrative recall — a cracked DPF lets unburned particulate matter bypass the filter, which can cause a failed MOT emissions test and potential Clean Air Zone compliance issues. The recall covers over 1.2 million Ford diesel vehicles worldwide across nearly the entire range — including the C-Max — built between 2014 and 2023.
Ford C-Max Exhaust System: The Part That Announces Its Own Problems
Where a lot of Ford C-Max 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.
Ford C-Max Exhaust System: Watch: Replacing It
US C-Max Hybrid (same Mk2 C-Max platform), exhaust leak diagnosis
Ford C-Max 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 Ford C-Max'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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Ford C-Max 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 Ford Exhaust System
The same part, covered across other Ford models.