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Erratic or weak HVAC airflow control linked to vacuum pressure drop
ECU remapping is recommended
The EGR bypass valve vacuum actuator on the Mercedes OM651 2
It helps restore crankcase pressure control and improve engine operation when the original membrane has failed
All pump seals and O-rings
Air Suspension Compressor Check Valve Repair Kit – Land Rover Discovery 3 / 4 L319 | OEM RQQ500016 LR010690 Erratic or weak HVAC airflowAir Suspension Compressor Check Valve Repair Kit Land Rover Discovery 3 4 L319 OEM RQQ500016 Fix Air Suspension Pressure Loss on Your Land Rover Discovery 3 or 4 Check Valve Repair Kit. A failed check valve in the air suspension compressor on Land Rover Discovery 3 and Discovery 4 (L319) causes air pressure loss after the engine is switched off leading to suspension sagging overnight. This repair kit restores correct check valve function in the
