Seat Arona Exhaust System: Specs, Fitment & Common Faults
If your Arona is a diesel that had the Dieselgate emissions update, a documented pattern links it to EGR failures afterward — including real fault codes worth knowing.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — Rear silencer (aftermarket) Bosal 154-511 / Walker 21953
| Rear silencer (back box) — aftermarket | Bosal 154-511, 233-607, 154-317 (accessories); Walker 21953 (640 mm), 22059 (810 mm); Ernst 112215 (780 mm), 105026 (690 mm); MTS 01.69080 (1000 mm), 01.95530 (740 mm), 01.69030 (820 mm); Vegaz VS-290 (680 mm), VS-352AT, FTS-5; Asmet 07.174, 03.097; Polmo 08.399, 23.68, 08.585, 08.671, 23.70, 08.400 |
|---|---|
| Centre / intermediate silencer — aftermarket | Bosal 233-477, 220-015, 105-109, 233-633 (accessories); Walker 71341 (1000 mm); Ernst 202046 (830 mm), 153003 (810 mm), 122191 (600 mm); MTS 01.80390 (900 mm), 01.59790 (880 mm); Vegaz SKS-30AT (990 mm), VS-111 (650 mm), VS-293AT; Polmo 24.78, 30.233, 01.104; Izawit 18.022, 15.033, 15.009, 16.009, 18.030, 23.034 (before rear muffler) |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | JMJ 1091391 (BSF/BSE/BGU), 1091544, 1090138 (ABD/AEX/ALM/APQ/AEE), 1090854 (AXP/AHW/APE/BCA/AZD...), 1091248 (BCB/BCA), 1090854FP2; BM Catalysts BM31200H (SCR Euro 6, with FK31200 PP31200A/B) plus several Euro 4 non-approved; Ridex 429C0042 (Euro 5, 320 mm); EEC VK6048T, AU8039T; Oyodo 10N0064. |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine parts against your VIN |
| Fitment notes | Engines: 1.0 TSI 95/110/115, 1.5 TSI 150, 1.6 SRE, 1.6 TDI, 1.0 TGi CNG. The cat engine codes (AUA, BBY, AXP, ABD...) are old VW 1990s-2000s codes, so the cat list is not reliable for a KJ7; the silencer lists are the reliable part. |
Worth Knowing: A Documented Link Between the Emissions Fix and EGR Failure
Worth understanding if you own a diesel SEAT that received the emissions compliance software update following the 2015 "Dieselgate" scandal: a genuinely documented, real case describes a 2011 Ibiza that ran fine for a period after the update, then developed a rough idle in first gear, an intermittent engine management light, and finally broke down completely in the middle of traffic — diagnosed by breakdown recovery as an EGR valve fault. Specific fault codes reported in connection with this pattern include P0407 and P046C, both relating to EGR sensors. The suggested technical explanation is that the software update commands the EGR valve to positions it was never previously asked to reach, accelerating wear and failure in valves that were coping fine under the original software calibration.
Separately, and relevant regardless of whether the emissions update applies to your specific car: a blocked DPF is overwhelmingly a short-journey problem — the filter needs sustained running at higher revs for around 20 miles to regenerate properly, and a diesel used mainly for short, low-speed trips may never complete this cycle, leading to warning lights, limp mode, and eventually a blockage requiring active intervention.
Seat Arona Exhaust System: The Part That Announces Its Own Problems
On the Seat Arona, 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.
Seat Arona Exhaust System: Watch: Replacing It
aftermarket cat-back fitting on shared MQB platform
Seat Arona Exhaust System: What It Does
The Seat Arona'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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Seat Arona 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 Seat Exhaust System
The same part, covered across other Seat models.