Volkswagen Tiguan Exhaust System: Specs, Fitment & Common Faults
If your Tiguan is a diesel that had the Dieselgate emissions software update, this is worth understanding — a documented pattern links the fix to accelerated EGR failure afterward.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — Rear silencer (aftermarket) Bosal 233-735 / Walker 22059
| Rear silencer (back box) — aftermarket | Bosal 233-735, 154-317, 233-607, 233-531; Walker 22059 (810 mm), 70615 (840 mm), 21950 (530 mm); Ernst 112215; Asmet 03.097, 04.083; MTS 01.64700, 01.69030, 01.90540, 01.95530; Vegaz VS-191, VS-112, VS-352AT; Polmo 30.27, 01.124, 30.09, 30.218 |
|---|---|
| Centre / intermediate silencer — aftermarket | Bosal 233-613, 233-567, 233-545, 233-577, 105-109; Walker 71341, 21575; Ernst 161039 (760 mm), 161022 (780 mm), 161046 (730 mm), 153003, 177092; Asmet 21.009; MTS 01.50577, 01.59810; Vegaz VS-111, VS-293AT, VS-417; Polmo 30.221 |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | Bosal 090-176 (Euro 4), 090-175 (Euro 5); Walker 28130 (550 mm), 28678 (490 mm); Vegaz VK-381 / VK-381QP (Euro 5, 540 mm), VK-325 (Euro 4/5), VK-316, VSCR-008 (SCR Euro 6); Ernst 760911 (Euro 4/5, 565 mm kit); BM Catalysts BM91685H (Euro 5), BM31200H (SCR Euro 6); JMJ 1091612 (550 mm), 1091674 (540 mm). |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine parts against your VIN |
| Fitment notes | Petrol 1.4/1.5/2.0 TSI, diesel 1.6/2.0 TDI, 1.4 eHybrid; no per-part split. Euro 5 cats are likely not for later Euro 6 cars. |
Worth Knowing: A Documented Link Between the Emissions Fix and EGR Wear
Worth understanding if you own a diesel VW that received the emissions compliance software update following the 2015 "Dieselgate" scandal: a documented pattern of owner reports links this update to accelerated EGR valve and DPF wear afterward. The technical explanation given is that the software fix increased how frequently and heavily the EGR system was used to reduce NOx emissions, which in turn increases the rate of diesel particulate matter produced, shortening the working life of the EGR valve, cooler, and DPF compared with before the update. Independent reporting has documented numerous cases of the EGR valve or cooler failing within a relatively short time of the update being applied — VW's response in a number of these cases has reportedly included replacing the EGR unit itself, sometimes at no cost, treating it as a related consequence of the fix.
Separately, and relevant regardless of whether the recall applies to your car: the EGR cooler on many 1.6 and 2.0 TDI engines is mounted at the rear of the engine, making it a genuinely difficult and expensive part to access — independent garages and forum reports consistently describe this as an unreliable component that can fail again within a few years even after replacement, with labour-heavy repair quotes commonly exceeding £1,000. A blocked DPF, meanwhile, is overwhelmingly a short-journey problem — the filter needs sustained running at roughly 2,000-2,500rpm for 20-30 minutes to regenerate properly, and a diesel used mainly for short, low-speed trips may never complete this cycle, leading to warning lights, reduced power, and eventually a blockage requiring active intervention.
Volkswagen Tiguan Exhaust System: The Part That Announces Its Own Problems
On the Volkswagen Tiguan, 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.
Volkswagen Tiguan Exhaust System: Watch: Replacing It
Tiguan rear silencer replacement; Mk2 likely but not verified
Volkswagen Tiguan Exhaust System: What It Does
Three jobs happen inside the Volkswagen Tiguan'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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Volkswagen Tiguan 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 Volkswagen Exhaust System
The same part, covered across other Volkswagen models.