Mazda 2 Exhaust System: Specs, Fitment & Common Faults
A genuinely useful piece of context worth knowing about Mazda's diesel range: the 2.2 diesel engine has been linked to oil contamination described as a known manufacturing fault, with a real £9,000 engine replacement quote.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — Rear silencer (aftermarket) Bosal 154-923 / Walker 23857
| Rear silencer (back box) — aftermarket | Walker 23857 (880 mm, code 52); Walker 71394 (820 mm); Walker 71393; Walker 71398 (800 mm); Bosal 154-923 / 171-045 / 154-447 (accessories needed); Ernst 310161 (800 mm); Vegaz FS-621 (825 mm) |
|---|---|
| Centre / intermediate silencer — aftermarket | Walker 23109 (1100 mm, filled); Bosal 171-377 (accessories needed); Vegaz MZS-16 (1160 mm), MZS-156 (centre, manual only), MZS-198, MZS-199; Hella 8LC 366 024-061 / -071 (three-piece kits); Izawit 17.079 |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | Bosal 090-003 (Euro 4); Walker 28109 (370 mm, with manifold), 20758 (310 mm); Vegaz MZK-837 (Euro 6), FK-965 (Euro 4), MZK-902 (Euro 4); NAP CAK10261 (Euro 4; engine codes M7JA/M7JB/FUJA/FUJB/FXJA-C); HJS 96 15 4081; Hella 8LA 366 007-181 (kit) |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine parts against your VIN |
| Fitment notes | engines: 1.5 petrol (75-115 HP), 1.5 D DJ5FS 105 HP, 1.5 SKYACTIV-G mild hybrid; not engine-specific. |
A Genuinely Useful Piece of Context Worth Knowing About Mazda's Diesel Range — Mazda 2 Exhaust System
If you're cross-shopping against a larger diesel Mazda, or considering a used one from the same range, this is genuinely worth knowing: Mazda's 2.2 diesel engine, used across the CX-5, Mazda 6, and Mazda 3, has been linked in documented cases to unburnt fuel contaminating the engine oil during DPF regeneration cycles, with two independent mechanics in one case describing it as a known manufacturing fault. Mazda quoted around £9,000 for a full replacement engine in that documented case — worth knowing as general context even if your own car doesn't use this specific engine.
It's also worth knowing that regular use of a fuel additive alongside genuinely sustained motorway-speed driving occasionally is a real, practical way to help any DPF-equipped diesel regenerate properly, worth building into your routine if your driving is mostly short, local journeys.
Mazda 2 Exhaust System: The Part That Announces Its Own Problems
Where a lot of Mazda 2 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.
Mazda 2 Exhaust System: Watch: Replacing It
Generation (DE vs DJ) not confirmed from title; weak
Mazda 2 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 Mazda 2'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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Mazda 2 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 Mazda Exhaust System
The same part, covered across other Mazda models.