VW Taigo's Rough Idle Points to Coil/O2 Sensor Fix

Had similar symptoms with my VW T-Roc 2018 last summer. The rough idle and acceleration issues matched exactly what you describe. The engine misfire was caused by a combination of a faulty ignition coil and a small exhaust leak near the manifold. The exhaust leak created incorrect readings for the oxygen sensor, which made the engine run rich. This caused the check engine light and inconsistent performance. The repair involved replacing two ignition coils and fixing the exhaust leak. It was a serious issue that needed immediate attention since the exhaust leak could worsen and potentially damage other components. The crankshaft sensor was also tested during diagnostics but turned out to be fine. These symptoms are common in TSI engines when ignition components start failing. Its worth getting it checked soon, as running with faulty ignition coils can damage the fuel injectors over time. For diagnostic transparency, request the error codes and ask them to show you the actual readings from the testing equipment. A reputable shop will have no issues explaining their findings.

Thanks for sharing the T-Roc experience. My Taigo actually showed those exact symptoms last month. After reading your post, Im curious about the repair costs for the ignition coils and exhaust work. My spark plugs also needed replacing during the fix. Have you had any recurring issues since the repair was done? Mine seems to run fine now but Id like to know what to watch out for in case the rough idle returns.

Glad your Taigo is running smoothly now. Since having the exhaust leak fixed on my T-Roc, the uneven engine running completely disappeared. The total repair came to 265€ for the exhaust work, which honestly seemed fair given the complexity of accessing the manifold area. The engine runs perfectly now with no recurring issues. The timing belt was also inspected during the repair and showed no signs of wear, which was reassuring. If the rough idle ever returns, pay attention to any changes in engine sound or fuel consumption, as these can indicate failing fuel injectors or ignition coil problems developing. Its always smart to keep monitoring for any unusual vibrations or hesitation during acceleration. A properly functioning ignition system should give you thousands of trouble-free kilometers. Just maintain regular service intervals and use quality fuel to prevent similar issues from developing again.

Thanks everyone for the helpful insights. I finally got my Taigo fixed last week after finding a trustworthy mechanic through a. The issue was exactly as suspected, two faulty ignition coils and worn spark plugs were causing the rough idle. The air filter was also quite dirty and needed replacement. The total repair cost came to 320€, including parts and labor. The mechanic showed me the old components and explained everything clearly. The engine now runs smoothly with no jerky acceleration or idling problems. The best part was how transparent the whole process felt. They even showed me the diagnostic readings before and after the repair. Really different experience from my previous mechanic who tried charging almost double without any explanation. Since the fix, the check engine light has stayed off and the car feels like new again. Will definitely stick with this mechanic for future services.