Mitsubishi Outlander Exhaust System: Specs, Fitment & Common Faults
A genuinely alarming, honest account: a DPF replaced by Mitsubishi itself failed the same way two weeks later, traced to technicians accidentally cutting the turbo boost pipe — plus a money-saving clarification that full DPF replacement is rarely actually necessary.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — Rear silencer (aftermarket) Walker 22230 / Ernst 690027
| Rear silencer (back box) — aftermarket | Walker 22230, 22239 (code 61); Ernst 690027; Vegaz MIS-234, MIS-225, MIS-223, MIS-268, MIS-272; Polmo 14.46, 14.38, 14.40; Izawit 19.051, 19.003; No Bosal. |
|---|---|
| Centre / intermediate silencer — aftermarket | Walker 22228 (code 62); MTS 01.50578, 01.50169, 01.54570, 01.58400, 01.57150, 01.50166; Vegaz MIS-121, MIS-191; Polmo 14.09. |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | Bosal 099-273 (Euro 1/2, manifold); Walker 28168 (420 mm, code 91); Vegaz MIK-962 (Euro 4), MIK-976, MIK-958; JMJ 1080382, 1090035. |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine parts against your VIN |
| Fitment notes | same shared Mitsubishi list as ASX/L200; petrol, diesel, hybrid, bifuel engines listed generally. |
Mitsubishi Outlander Exhaust System: The Part That Announces Its Own Problems
On the Mitsubishi Outlander, this is one part where you'll usually hear the fault before you see it — a rattle, a drone, a sudden increase in noise that wasn't there last week. That's actually useful, since it gives you a head start on catching problems early.
Mitsubishi Outlander Exhaust System: What It Does
The Mitsubishi Outlander's exhaust system channels burnt gases away from the engine, reduces noise through the silencer, and treats emissions through a catalytic converter and particulate filter before gases exit the tailpipe. Petrol and diesel versions often use entirely different systems due to different emissions treatment requirements.
Mitsubishi Outlander Exhaust System: Watch: Replacing It
Cat replacement, correct years
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A Genuinely Alarming, Honest Real Account Worth Knowing — Mitsubishi Outlander Exhaust System
If a DPF fault returns shortly after a replacement, this is genuinely worth knowing before assuming the new part is simply faulty: one documented case saw a diesel Outlander have its DPF replaced directly by Mitsubishi, only for the exact same warning and limp mode issue to return just two weeks later. It later emerged that technicians had accidentally cut the turbo boost pipe during the original replacement work — with the owner reasonably suspecting this damage, rather than a genuinely faulty replacement part, was the actual cause of the recurrence all along. It's genuinely worth asking directly whether any other components were disturbed or potentially damaged during a DPF replacement if the same fault returns shortly afterward, rather than assuming the new DPF itself must be defective.
It's also genuinely worth knowing two useful diagnostic points: an EGR valve sticking open can cause excessive soot accumulation that then gets misdiagnosed as a DPF fault specifically, worth having checked as a separate possible cause. And it's worth keeping an eye on the DPF additive fluid level, since running low or completely out can trigger warning lights that look identical to a genuine filter fault — worth checking and topping this up before assuming a more expensive repair is needed.
Mitsubishi Outlander 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 Mitsubishi Exhaust System
The same part, covered across other Mitsubishi models.