Wix 51191 Engine Oil Filter

WIX 51191 Oil Filter for Audi and Volkswagen

The WIX 51191 engine oil filter is built for drivers who want dependable filtration for everyday commuting and severe service conditions. It is a spin-on lube filter with enhanced cellulose media, an anti-drain back valve, and a 30 psi bypass setting for consistent oil flow during cold starts and extended service intervals.

Key Features

• Enhanced cellulose media helps capture dirt and contaminants in normal and severe driving
• Anti-drain back valve helps reduce dry starts when the engine sits between drives
• Spin-on lube filter design with 3/4-16 thread size
• 21 micron filtration rating with a 2/20 = 6/20 beta ratio
• 7-9 GPM flow rate and 345 burst pressure rating
• Recommended for OEM oil and filter change intervals, typically 3,750 to 10,000 miles

Detailed Description

WIX 51191 is an engine oil filter for select Audi A4, Audi A4 Quattro, Audi A6, Audi A6 Quattro, Audi Cabriolet, Audi 90, and Volkswagen Passat, Golf, Jetta, Quantum, Vanagon, and Rabbit Pickup applications. It is engineered for conventional, synthetic, and synthetic-blended motor oils and is suited to stop-and-go traffic, short trips, dirt roads, construction zones, and interstate driving. The filter’s silicone anti-drain back valve helps retain oil in the filter when applicable, supporting cleaner starts after the vehicle has been parked. This part cross-references FRAM PH3569 and Purolator L 30257 for the same application. The WIX 51191 part number is also commonly searched for Audi A4 oil filter and Volkswagen Passat oil filter replacement needs.

What It Helps Address

• Excess dirt and contaminant buildup in engine oil
• Oil drain-back after shutdown that can contribute to dry starts
• Routine oil service on Audi and Volkswagen gasoline applications
• Filtration demands from severe driving, short-trip use, and traffic-heavy commuting
• Replacement needs for OE-style oil filter service intervals

Installation Notes and Tips

Verify thread size, filter height, and gasket sealing surface before installation. Replace the filter at the manufacturer-recommended oil change interval and pre-fill only if the vehicle service procedure allows it. Always confirm fitment against the vehicle’s engine code and service specifications for your Audi A4, Audi A6, or Volkswagen Passat application. The WIX 51191 is a spin-on filter, so proper tightening and a clean sealing surface are important for leak-free service.

Quality Assurance

WIX publishes laboratory test performance data for this filter line, including dirt-holding and efficiency measurements under ISO testing methods. The 51191 is built to support OE-recommended maintenance intervals and severe-duty use cases without exceeding 12 months between changes.