Audi Q2 Exhaust System: Specs, Fitment & Common Faults
On the Q2, power loss and smoke that looks like DPF failure on related models can genuinely be a faulty back pressure sensor.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — Rear silencer (aftermarket) Bosal 105-127 / Walker 13379
| Rear silencer (back box) — aftermarket | Bosal 105-127, 105-031, 105-137, 105-017 (need accessories); Walker 13379 (1050 mm, 5.22 kg, code 53, filled); Vegaz VS-37 (1040 mm), AS-86 (1070 mm), AS-164 (1000 mm), AS-190 (1070 mm), AS-313AT (1060 mm); Polmo 01.124 (with cat) / 01.14 (without) / 01.05 (manual); Izawit 15.003 |
|---|---|
| Centre / intermediate silencer — aftermarket | Bosal 105-109, 105-159, 105-111, 220-015; Walker 22719 (760 mm, code 62), 21575 (790 mm, code 52), 24145 (900 mm, code 62); Ernst 233026 (1080 mm), 202022 (830 mm), 202046, 114172 (900 mm); MTS 01.59810 (900 mm), 01.53750 (1140 mm); Asmet 21.009; Vegaz VS-293AT; Polmo 01.62/01.104/01.106 (with cat), 01.08 |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | or DPF: Walker 28222 (715 mm, code 92, with pipe and fitting parts); BM Catalysts BM31200H (SCR, Euro 6, only with FK31200/PP31200A/B), BM91391H, BM91518H, BM90529H (Euro 4, non-approved); JMJ 1091391 (1050 mm; BSF/BSE/BGU), 1091579 (900 mm; BAG/BCA/BUD/BLP/BKG), 1091519 (910 mm), 1090694 (1010 mm), 1090954 (415 mm); Vegaz VK-976AT (to Euro 4); Polmo 30.628 and 24.59 are repair pipes. |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine parts against your VIN |
| Fitment notes | Cat list is mostly older VW engines (AUA/BBY, AVB/AWX etc.); few parts look specific to the Q2, so confirm fitment by engine code. |
Audi Q2 Exhaust System: The Part That Announces Its Own Problems
Where a lot of Audi Q2 parts fail silently until you spot something visually wrong, this one tends to make noise first — a rattle, a drone, an audible change that wasn't there recently. That's a useful early-warning system if you're paying attention.
Audi Q2 Exhaust System: What It Does
Away from the engine, through the silencer, and often through a catalytic converter and particulate filter before reaching the tailpipe — that's the Audi Q2's exhaust job in three steps. Petrol and diesel versions frequently need different systems entirely, since their emissions treatment isn't the same.
Audi Q2 Exhaust System: Watch: Replacing It
Weak: generic VW/Audi DIY, not Q2 specific (Q2 shares MQB with A3 8V). Nothing Q2-specific found beyond sound/aftermarket clips.
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A Genuinely Useful Piece of Context Worth Knowing About DPF Diagnosis — Audi Q2 Exhaust System
If you're facing power loss and heavy smoke, this is genuinely worth knowing before assuming the DPF itself has failed: documented cases on related Audi models describe these exact symptoms traced to a faulty exhaust back pressure sensor giving incorrect readings, rather than the DPF itself, worth checking this cheaper component first.
It's also genuinely worth knowing an important legal clarification: removing emissions control equipment fitted for type approval isn't legal in the UK, regardless of whether a "DPF delete" currently passes an MOT test.
Audi Q2 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 Audi Exhaust System
The same part, covered across other Audi models.