Ford S-Max Exhaust System: Specs, Fitment & Common Faults
A confirmed, major current Ford-wide recall covers DPF cracking on diesel S-Max models built 2014-2023 — check your registration before anything else.
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OEM Part Number: confirm via VIN — Rear silencer (aftermarket) Bosal 154-503 / Walker 22693
| Rear silencer (back box) — aftermarket | Bosal 154-503; Walker 22693 (820 mm); MTS 01.92280 (830 mm); MTS 01.60602 (960 mm); Vegaz FS-497 (950 mm); Vegaz VOS-174 (1037 mm); Izawit 14.603 |
|---|---|
| Centre / intermediate silencer — aftermarket | Walker 22853 (980 mm); Bosal 154-133; Ernst 332095; MTS 01.52160; Vegaz FS-571; Izawit 17.135 |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | Vegaz FK-349 (Euro 6); Walker 20947 (810 mm, with manifold); Bosal 090-183 (Euro 4); JMJ 1091692 (HUBA, HUWA); BM Catalysts BM80577H; Polmo 08.49 (repair pipe) |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine parts against your VIN |
| Fitment notes | Engines 1.5/2.0 EcoBoost, 2.0 EcoBlue/TDCi, 2.5 FHEV at category level only. |
A Genuinely Major, Current Recall Worth Checking If You Have a Diesel — Ford S-Max Exhaust System
This is worth checking directly against your registration if you own a diesel S-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 S-Max — built between 2014 and 2023.
Ford S-Max Exhaust System: The Part That Announces Its Own Problems
On the Ford S-Max, you'll typically hear this fault developing long before you'd ever see it — a new rattle, an odd drone, noise levels creeping up from one week to the next. That early audible warning is a genuine head start on catching the problem before it worsens.
Ford S-Max Exhaust System: Watch: Replacing It
Mondeo shares platform with 2015 S-Max; generation of video NOT confirmed
Ford S-Max Exhaust System: What It Does
The Ford S-Max's exhaust does more than just carry gases away from the engine — it also handles noise reduction through the silencer and emissions treatment via a catalytic converter and particulate filter. That's why petrol and diesel versions can use entirely different systems.
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Ford S-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.