Fuel Filter and Pressure Regulator Assembly for 2002-2005 Audi A4 Quattro & More - Standard Ignition PR497

Keep fuel pressure steady across the engine's operating range with the Standard Ignition Fuel Filter and Pressure Regulator Assembly / Fuel Injection Pressure Regulator PR497. It installs as a direct-fit replacement for the listed applications: the 2002-2005 Audi A4 Quattro (L4-1.8L), 2004 Audi S3 (L4-1.8L), 2004 Audi S4 (V8-4.2L), and 2004 Audi S6 (V8-4.2L). This part is cataloged under both names — a fuel filter and pressure regulator assembly and a fuel injection pressure regulator.

• Regulates fuel pressure: holds the intended pressure at the fuel rail and returns excess fuel, so the injectors receive a controlled supply.
• Integrated fuel filtration: strains contaminants out of the fuel as it passes through the assembly.
• Combination design: pairs the filter and regulator functions in a single serviceable unit.

Signs this part may need replacing include hard starting, a rough or unstable idle, a fuel odor, or poor throttle response. Because these symptoms can have other causes, diagnose the fuel system first; if a failed regulator or clogged filter is the cause, this assembly replaces it.

Manufacturer part number PR497.