Volvo V40 Exhaust System: Specs, Fitment & Common Faults
On the V40, cracked catalytic converters on related models have genuinely been traced to poor factory welding and successfully repaired by welding rather than full replacement.
Illustration for editorial purposes
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Volvo V40 Exhaust System: OEM Part Number
| Front pipe with catalytic converter (petrol) | Genuinely a different part from the diesel front pipe below (where fitted) — confirm your exact engine code before ordering |
|---|---|
| Front pipe with diesel particulate filter (diesel, where fitted) | A genuinely different assembly from the petrol cat pipe, combining catalytic and particulate filtration in one unit |
| Centre/intermediate pipe | A genuinely separate section from both the front pipe and rear silencer |
| Rear silencer, front-wheel drive | A genuinely different silencer and mounting arrangement applies versus AWD variants — the underbody routing differs enough that the two aren't interchangeable |
| Rear silencer, AWD | A genuinely different silencer and mounting from the front-wheel-drive version above, to clear the rear differential and driveshaft routing |
| Polestar/T8 performance rear silencer | A genuinely different, larger-bore system from the standard variant — not a like-for-like swap with the standard rear silencer |
Volvo V40 Exhaust System: The Part That Announces Its Own Problems
On the Volvo V40, 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.
Volvo V40 Exhaust System: What It Does
The Volvo V40'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.
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A Genuinely Useful Piece of Context Worth Knowing About Catalytic Converter Cracks — Volvo V40 Exhaust System
If a catalytic converter has developed a crack, this is genuinely worth knowing: documented cases on related Volvo models trace this to low-quality factory welding, with owners successfully repairing the crack by welding it themselves rather than paying for full replacement.
It's also worth knowing that stopping the engine partway through a DPF regeneration cycle can let diesel fuel dilute the engine oil, worth bearing in mind if your driving is mostly short journeys.
Volvo V40 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 Volvo Exhaust System
The same part, covered across other Volvo models.