Original MANN-FILTER Oil Filter WK 939/5 – For passenger cars

MANN‑FILTER Oil Filter WK 939/5

The MANN‑FILTER Oil Filter WK 939/5 is a premium filtration solution designed specifically for passenger cars that demand reliable engine protection and optimal performance. Developed by the renowned German manufacturer MANN‑FILTER, this filter combines advanced engineering with high-quality materials to deliver superior oil purification.

Key Features

• High Filtration Efficiency: Captures particles as small as 0.5 microns, ensuring that only clean, contaminant‑free oil circulates through the engine.
• Durable Construction: Constructed from robust polypropylene and a high‑grade filter media that resists compression and maintains shape under pressure.
• Optimized Flow Rate: Designed to provide an optimal balance between filtration and oil flow, reducing engine wear while maintaining efficient lubrication.
• Easy Installation: Features a standard threaded design compatible with most passenger car engines, allowing for quick replacement without special tools.
• Long Service Life: Engineered to last through extended intervals between oil changes, reducing maintenance frequency and enhancing vehicle reliability.

Technical Specifications

Installation Guide

1. Park the vehicle on a level surface and engage the parking brake.
2. Locate the oil filter housing, typically positioned near the engine block or oil pan.
3. Use an appropriate wrench to loosen and remove the existing filter. Be prepared for residual oil; keep a rag handy.
4. Inspect the rubber gasket on the new WK 939/5 for any damage. Replace if necessary.
5. Apply a thin layer of fresh engine oil to the gasket seal to ensure a proper fit and prevent leaks.
6. Screw the filter onto the housing by hand until snug, then tighten an additional 1/4 turn with the wrench.
7. Check for any oil drips around the base; if present, tighten slightly more or replace the gasket.
8. Start the engine and allow it to reach operating temperature. Inspect again for leaks.

Maintenance Tips

• Replace the oil filter at every scheduled oil change to maintain optimal filtration performance.
• Avoid using aftermarket filters that do not meet MANN‑FILTER specifications, as they may compromise engine protection.
• Inspect the filter housing for cracks or wear before each replacement; replace if damaged.
• Store unused filters in a dry, cool environment to preserve media integrity.

Benefits of Choosing MANN‑FILTER WK 939/5

The MANN‑FILTER Oil Filter WK 939/5 delivers consistent protection against contaminants that can cause engine wear and reduce fuel efficiency. Its high filtration capacity ensures that the oil remains clean, extending the life of critical engine components such as bearings, pistons, and camshafts. By maintaining optimal lubrication, the filter also contributes to smoother engine operation and lower emissions.

Engineers and automotive professionals trust MANN‑FILTER for its rigorous testing standards and proven performance in demanding driving conditions. The WK 939/5 is no exception; it has been validated through extensive laboratory and real‑world trials to meet or exceed industry benchmarks for filtration efficiency, pressure drop, and durability.

Compatibility Overview

The WK 939/5 is engineered for a wide range of passenger car engines. While the filter’s dimensions and threading are standardized, it is always advisable to consult your vehicle’s service manual or a qualified technician to confirm compatibility with specific engine models.

Conclusion

For drivers who prioritize engine longevity, performance, and reliability, the MANN‑FILTER Oil Filter WK 939/5 represents an essential component of vehicle maintenance. Its advanced filtration technology, durable construction, and ease of installation make it a superior choice for protecting your engine’s heart—the oil system—ensuring that every drive is smooth, efficient, and safe.