Toyota GT86 Exhaust System: Specs, Fitment & Common Faults
On the GT86, 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 22203
| Rear silencer (back box) — aftermarket | Bosal 228-407, 228-185, 228-001, 228-063; Walker 22203 (940mm); Asmet 20.021, 20.029, 20.036; MTS 01.60714, 01.97470; Vegaz TS-226, TS-336; Polmo 26.16, 26.02, 26.177; Izawit 35.013, 35.019 |
|---|---|
| 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 090-012 (Euro 4, E57 103R 000332); Walker 28331 (420mm), 20763 (470mm); Vegaz OK-342 (Euro 5/6); BM Catalysts BM91976H, BM91873H, BM91339H; JMJ 1091587, 1091034, 1091303 |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine parts against your VIN |
| Fitment notes | lists are largely the same generic Toyota set as Aygo/C-HR |
A Genuinely Important Point Worth Knowing Before Attempting a Motorway "Regen" — Toyota GT86 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 GT86 Exhaust System: The Part That Announces Its Own Problems
On the Toyota GT86, 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.
Toyota GT86 Exhaust System: Watch: Replacing It
Aftermarket rear exhaust fit rather than a like-for-like repair, but it shows the rear section coming off and going back on.
Toyota GT86 Exhaust System: What It Does
The Toyota GT86'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.
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Toyota GT86 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.