Crankcase (pcv) problems of the 2023 Volkswagen Tiguan

I am filing a safety complaint regarding my 2023 Volkswagen Tiguan se r-line with approximately 54,000 miles. The vehicle experienced a significant engine-related failure involving the oil separator/pcv system. Volkswagen diagnosed a failed oil separator/breather that caused excessive crankcase pressure, resulting in substantial oil expulsion and damage/leaks involving the plastic/composite oil pan and timing-chain cover. Volkswagen also identified oil contamination around engine sensors and a p0341 camshaft-position fault. The vehicle has previously experienced epc/check-engine warnings and entered limp mode, creating concern about potential loss of power while driving. The dealer’s repair required replacement of the oil separator/pcv system, oil pan, timing-chain cover and associated gaskets, along with cleaning oil from the engine compartment and sensors. The repair estimate was approximately $2,490, later reduced to approximately $2,300. Volkswagen declined my request for goodwill assistance. I am concerned that a failure of the oil separator/pcv system can create excessive crankcase pressure and cause oil to be expelled from the engine, damage other engine components, contaminate sensors, trigger fault codes, and potentially result in reduced engine power or limp mode. Sudden oil loss or loss of engine power can create a serious safety hazard, particularly at highway speeds or in traffic. This vehicle has also experienced recurring alignment problems, requiring three alignments in approximately six months, raising additional concerns about the vehicle’s overall reliability and safety. I request that NHTSA investigate whether oil-separator/pcv failures and their resulting oil loss, component damage, sensor faults, and potential loss of power represent a broader safety defect in 2023 Volkswagen Tiguan vehicles.

The contact owns a 2023 Volkswagen Tiguan. The contact stated that while driving 35-40 mph, the engine warning light illuminated. The vehicle was leaking oil. The vehicle was taken to the local dealer, where it was diagnosed that the oil separator, pcv positive crankcase ventilation valve, and gasket needed to be replaced. The vehicle was not repaired. The manufacturer was contacted. Who confirmed there was no recall coverage. The approximate failure mileage was 56,000.