Toyota C-HR Exhaust System: Specs, Fitment & Common Faults
On the C-HR, 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 228-477 / Walker 22203
| Rear silencer (back box) — aftermarket | Bosal 228-477, 228-063, 228-001, 228-407; Walker 22203 (940mm); Asmet 20.029, 20.021; MTS 01.61199 (880mm), 01.97470; Vegaz TS-226, TS-336; Polmo 26.02, 26.178; Izawit 35.025, 35.019 |
|---|---|
| Centre / intermediate silencer — aftermarket | Bosal 228-251; Walker 22017, 22418, 22018, 23695; Izawit 35.043, 35.001; Vegaz TS-232, TS-278; Polmo 26.19/26.22/26.280 |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | Bosal 090-012 (Euro 4); Walker 28331 (420mm w/ manifold), 20763 (470mm); Vegaz TK-316, TK-336 (Euro 6), OK-342 (Euro 5/6); BM Catalysts BM91976H (Euro 5), BM91677H; JMJ 1080359, 1091034 (1KR-FE) |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine parts against your VIN |
| Fitment notes | JMJ/NAP converter engine codes (1KR-FE, to 2009) do not match a C-HR. Verify. |
A Genuinely Important Point Worth Knowing Before Attempting a Motorway "Regen" — Toyota C-HR 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 C-HR Exhaust System: The Part That Announces Its Own Problems
On the Toyota C-HR, 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 C-HR Exhaust System: Watch: Replacing It
silencer replacement
Toyota C-HR Exhaust System: What It Does
Three jobs happen inside the Toyota C-HR'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 C-HR 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.