Genuine OEM Audi Power Steering Reservoir Cap, part number 8E0422376. This cap is designed to securely seal the power steering fluid reservoir, preventing fluid leaks and protecting the system from contamination. It often includes an integrated dipstick for checking fluid levels. The cap is green and weighs 0.0255 kg. This genuine OEM cap ensures a perfect seal and proper fluid level indication, critical for maintaining the integrity and performance of the power steering system.