Ford Fiesta Exhaust System: Specs, Fitment & Common Faults
A confirmed, major current Ford-wide recall covers DPF cracking on diesel Fiestas built 2014-2023 — check your registration before anything else.
Illustration for editorial purposes
Opens live listings in a new tab.
OEM Part Number: confirm via VIN — Rear silencer (aftermarket) Bosal 154-481 / Walker 23975
| Rear silencer (back box) — aftermarket | Bosal 154-481; Bosal 154-483; Walker 23975 (910 mm, code 52); Walker 23996 (930 mm, code 52); Ernst 314084 (950 mm); Ernst 314091 (930 mm); MTS 01.61157 (980 mm) / Walker 21303 (790 mm, code 52); Bosal 154-923; MTS 01.61157 (980 mm); Vegaz FS-601 (7.7 kg); Izawit 17.142. |
|---|---|
| Centre / intermediate silencer — aftermarket | Walker 23210 (990 mm, code 62); Walker 22854 (980 mm, code 53); MTS 01.52160 (1015 mm); MTS 01.80300 (900 mm); Bosal 154-459; Ernst 310215 |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | Bosal 090-216 (Euro 5/6); Bosal 090-813 (Euro 4/5/6); Walker 20758 (310 mm, code 91); Vegaz FK-317 (770 mm); BM Catalysts BM91755H; JMJ 1091730 (Euro 5/6). |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine parts against your VIN |
| Fitment notes | for 2012-2017 facelift fitment check separately. Not engine-specific. |
A Genuinely Major, Current Recall Worth Checking If You Have a Diesel — Ford Fiesta Exhaust System
This is worth checking directly against your registration if you own a diesel Fiesta: 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 Fiesta — built between 2014 and 2023.
Ford Fiesta Exhaust System: The Part That Announces Its Own Problems
On the Ford Fiesta, 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.
Ford Fiesta Exhaust System: Watch: Replacing It
Mk7 2012 rear silencer swap
Ford Fiesta Exhaust System: What It Does
The Ford Fiesta'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.
Opens live listings in a new tab.
Ford Fiesta 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.