In June, whilst looking into an engine check light (unrelated minor EVAP issue) my independent German automotive specialist discovered an active coolant leak coming from the water pump assembly on my 2022 Macan S (2.9L EA839 V6 engine). Because my factory warranty had just expired, I took the vehicle to my local Porsche dealership at the beginning of July when they could fit me in under a 'goodwill repair'. The dealership service department denied that an active leak existed, claiming it was "just dried coolant around the weep hole" and normal venting, and refused to replace the pump. I trusted their diagnosis at the time. In September, I returned to my independent specialist for an EVAP line replacement. Because the issue was unresolved, the mechanic pulled the vacuum line connected to the water pump assembly to check for internal progression. He physically demonstrated to me that because the dealership refused to address the failure in July, liquid coolant had now breached the internal seals and was actively leaking inside the engine's vacuum lines. Safety Risk: The dealership's denial of this failure in July allowed a known manufacturing defect to progress into a dangerous internal coolant migration issue. On the EA839 engine architecture, when coolant enters the vacuum system, it travels downstream and contaminates the turbocharger wastegate actuators and the brake booster lines. This creates an immediate safety hazard, risking a sudden, unexpected loss of engine power and compromised, stiff braking response while driving on active roadways. Porsche has extended warranties for Audi vehicles with this exact engine, but has failed to issue a safety recall for Porsche owners facing the identical hazard.
- NHTSA ID
- 11771977
- Incident
- Jun 16, 2026