The injector does not close fully, and with the engine standing fuel drips into the cylinder. The symptoms are hard, long cranking (mostly after standing for a while), smoky first minutes, a hesitant idle, and dilution of the engine oil: the oil level goes higher, it smells of petrol, and the diluted oil lubricates worse. It shows up on cars built between 2018 and 2020.

In the EA211 the water pump and the thermostat are one plastic module, and the pump is driven not by the timing belt but by a separate toothed belt behind the exhaust camshaft. There are usually two problems with it: the plastic housing warps or cracks (slow coolant loss, a sweet smell, rising temperature), or the drive belt ages (a chirping noise, then an engine left with no cooling). The housing is particularly sensitive if oil reaches it: for example from a leaking crankcase ventilation. The module has to be replaced whole: dismantling it warps it in itself.

The piston of a rear caliper with an electric parking brake cannot be wound back by hand: the caliper has to be put into service mode with a diagnostic tool. Where that was bypassed, the actuator of the caliper is damaged, and soon after a disc replacement the caliper needs replacing too.

The seven speed dry DSG often starts shifting hesitantly as early as 30,000 to 50,000 km: it does not shift smoothly, sometimes it cannot find the gear, and it jerks worst in slow, congested traffic. The cause is wear of the clutch pack and the mechatronics unit. Many people skip the oil change because they believe it is a lifetime fill, and most DSG faults come from that.

The stop-start drops out as early as 20,000 to 35,000 km, typically on the 1.0 TSI and 1.6 TDI versions. The cause is the condition of the battery.

The per cylinder ignition coil of these direct injection, turbocharged petrol engines fails. According to the Haynes service material this and similar simple electrical faults account for roughly eighty per cent of workshop visits.