Genuine OEM Audi Brake Fluid Reservoir, part number 5N0698137. This essential component safely stores the brake fluid required for the hydraulic braking system, maintaining the correct fluid level and preventing air ingress. It is typically located in the engine bay, connected to the master cylinder. Made from durable, translucent plastic with a black cap, it measures approximately 0.2m x 0.11m x 0.12m. Using a genuine OEM reservoir ensures proper fluid compatibility, leak-free sealing, and accurate fluid level monitoring, which are critical for brake system safety and performance.

Catalogue entry: TANK.