✓ The faults of this engine were checked against sources (10/2026). Each item has at least two independent sources or an official recall or parts-maker technical note.
Coolant pump / thermostat module leak (plastic housing)
usually 60,000–150,000 km · Medium risk
Signs: Coolant level slowly drops, pink crust or damp at the gearbox end of the cylinder head, sweet smell after driving
Fix: Pressure-test the system, replace the pump and thermostat module together with its small drive belt, then bleed the system using diagnostics
€300–700
Turbo wastegate linkage rattles or seizes
usually 40,000–150,000 km · Wear part
Signs: Metallic rattle from the turbo at idle, low revs or when coasting; if the rod seizes, underboost (P0299) and reduced power
Fix: Fit the VW linkage repair kit (rod, washer, clip) and lubricate it with high-temperature paste; replace the actuator or turbo only if they have failed
€100–1,200
Ignition coil failure
usually 60,000–180,000 km · Wear part
Signs: Misfire, shaking at idle, flashing engine light, codes P0300–P0304
Fix: Swap coils between cylinders to confirm the fault, replace the faulty coil and check the spark plugs
€50–300
Carbon deposits on the intake valves (direct injection)
usually 100,000–220,000 km · Wear part
Signs: Rough cold idle, misfires, weaker response and higher fuel use at high mileage, mostly in cars used for short trips
Fix: Confirm with an endoscope through the intake ports and clean the valves mechanically (walnut blasting); fuel additives do not reach the valves
€250–600