Original MANN-FILTER Fuel filter WK 821 – For Passenger Cars

MANN‑FILTER Fuel Filter WK 821

The MANN‑FILTER Fuel Filter WK 821 is a high‑performance, precision‑engineered component designed to protect the fuel system of passenger cars from contaminants that can compromise engine efficiency and longevity. This filter delivers superior filtration capability while maintaining low pressure drop, ensuring optimal fuel flow for modern engines.

Key Technical Features

• Filtration Efficiency: Captures particles as small as 1 micron, preventing wear on fuel injectors and pumps.
• Pressure Drop: Maintains a minimal pressure loss of 0.5 kPa under normal operating conditions, preserving engine performance.
• Material Composition: Constructed from high‑grade cellulose fibers bonded with a durable polymer matrix for long service life.
• Dimensions: Standard size of 81 mm diameter and 129 mm length, compatible with most passenger car fuel lines.
• Installation Type: Screw‑on (anschraubfilter) design allows for quick replacement without the need for specialized tools.
• Compatibility: Suitable for a wide range of vehicle brands including FIAT, PEUGEOT, CITROËN, BMW, NISSAN, TOYOTA, and many others.

Performance Benefits

The WK 821 filter’s advanced filtration technology ensures that only clean fuel reaches the engine. This leads to:

• Improved Fuel Efficiency: By preventing injector clogging, the engine can maintain optimal combustion.
• Extended Engine Life: Reduced contamination translates into lower wear on critical components such as pistons and valves.
• Consistent Power Delivery: Stable fuel pressure results in smoother acceleration and reduced hesitation.

1. Locate the Fuel Filter: The WK 821 is typically positioned along the fuel line between the fuel tank and the engine’s fuel rail.
2. Disconnect Fuel Line: Use a suitable wrench to loosen the fittings, allowing any residual pressure to release safely.
3. Remove Old Filter: Unscrew the existing filter by turning it counter‑clockwise. Dispose of it according to local regulations.
4. Install New Filter: Align the new WK 821 with the fuel line and screw clockwise until secure. Ensure no gaps or misalignments.
5. Reconnect Fuel Line: Tighten fittings firmly, then check for leaks by inspecting the connections after a short test drive.

• Replace the filter every 15,000–30,000 miles or as recommended by the vehicle manufacturer.
• Avoid using the filter in extreme temperatures; store it in a dry, cool place to preserve fiber integrity.
• Inspect the filter housing for cracks or corrosion before installation to prevent leaks.

MANN‑FILTER is renowned for its commitment to quality and innovation in automotive filtration. The WK 821 model exemplifies this reputation through:

• Rigorous testing against ISO and OEM standards.
• Use of recyclable materials where possible, supporting environmental sustainability.
• A proven track record across a diverse range of vehicle platforms.

The WK 821’s versatility makes it an ideal choice for numerous car models. Some notable applications include:

• FIAT: Bravo I, FIORINO Pick‑up, and other passenger cars.
• PEUGEOT: AX 3/5 portes, Saxo, Xsara, and related models.
• CITROËN: Various compact and mid‑size vehicles.
• BMW, NISSAN, TOYOTA: Selected models requiring a reliable fuel filter.

The MANN‑FILTER Fuel Filter WK 821 delivers exceptional filtration performance, durability, and ease of installation. Its compatibility with a wide array of passenger cars makes it an indispensable component for maintaining engine health and ensuring optimal vehicle operation.