CJZA 1.2 TSI
The small turbo petrol of the MQB range, and better in a Golf than 105 PS suggests because the torque arrives early. It's chain-driven, and the water pump and thermostat housing are the parts that leak on this family.
| Configuration | I4, turbocharged | Displacement | 1197 cc |
| Fuel | petrol | Injection | direct |
| Shared components | direct injection · water pump and thermostat housing | ||
Cars using this engine
Engine and component issues
Rough cold idle, slow throttle response, misfires, gradual loss of low-end response. Direct injection puts no fuel over the intake valves, so crankcase vapour deposits bake on undisturbed.
Check: Not visible without a borescope. Treat it as a service item that's due unless there's a receipt. It's not a fault, it's an unbudgeted maintenance cost.
Coolant disappearing with no puddle underneath, a crusty residue around the front of the engine, and eventually a low-coolant warning. The water pump and thermostat housing on this engine family are a plastic assembly that weeps as it ages. It's a wear item rather than a defect, and because the pump is driven off the timing belt on the diesels the labour is more than the part suggests.
Check: Look for dried coolant staining around the front of the engine and check the expansion tank level against its marks. Ask whether it has been done, because most cars of this age have either had it or are due.
Chassis, gearbox and body issues aren't listed here. They depend on which car the engine is fitted to. Open a variant page for the merged list.