Toyota Yaris Exhaust System: Specs, Fitment & Common Faults
On the Yaris, if diesel, attempting a motorway "regen" while the engine management light is already on is often genuinely futile.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — Rear silencer (aftermarket) Bosal 228-407 / Walker 24330
| Rear silencer (back box) — aftermarket | Bosal 228-407, 228-299, 228-001, 228-063; Walker 24330 (875mm), 24502 (860mm); Ernst 687072 (910mm), 687102, 686099; Asmet 20.029, 20.030; MTS 01.60957, 01.61199, 01.97470; Vegaz TS-226, TS-340 (850mm), TS-490/488/493; Polmo 26.39, 26.275, 26.178, 26.177 |
|---|---|
| Centre / intermediate silencer — aftermarket | Bosal 228-251; Walker 22017, 22418, 22018, 23695; Vegaz TS-232, TS-278, TS-235; Polmo 26.19/26.22/26.280; Izawit 35.001, 35.043 |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | Bosal 090-309 (Euro 6.2); Walker 28923 (400mm, OE 2505147180), 28082 (300mm); Vegaz TK-871, TK-813, TK-818, TK-328; BM Catalysts BM80563H, BM91976H, BM92642H; JMJ 1091034, 1091587 |
| Genuine (OE) numbers quoted | 2505147180 (Walker 28923 converter) |
| Fitment notes | rear silencers look genuinely model-specific; middle silencer is the generic Toyota set; diesel 1.4D not split out. |
A Genuinely Important Point Worth Knowing Before Attempting a Motorway "Regen" — Toyota Yaris Exhaust System
If your diesel's engine management light has already illuminated, this is genuinely important to know before spending time and fuel on a hard motorway run: a proper regeneration cycle generally can't occur while the engine management light is on, since it indicates an underlying fault the ECU needs resolved first. Attempting to "drive it out" at this stage is often genuinely futile — the fault causing the light needs diagnosing and fixing before regeneration can succeed.
It's also worth knowing that a recurring EGR-related fault code that returns despite cleaning points toward the valve needing replacement rather than further cleaning.
Toyota Yaris Exhaust System: The Part That Announces Its Own Problems
On the Toyota Yaris, most faults are things you'd spot visually first, but this one usually announces itself acoustically — a rattle, a drone, a noticeable jump in noise levels. That's actually helpful, since it means you'll likely notice trouble well before it gets serious.
Toyota Yaris Exhaust System: Watch: Replacing It
Title does not say which Yaris, so it may be an older car. Check before use.
Toyota Yaris Exhaust System: What It Does
Three jobs happen inside the Toyota Yaris's exhaust system: routing burnt gases away from the engine, quieting them through the silencer, and treating emissions via a catalytic converter and particulate filter. Petrol and diesel variants often need completely different systems to meet their respective emissions requirements.
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Toyota Yaris 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 Toyota Exhaust System
The same part, covered across other Toyota models.