Find Audi A4 Rear End Bearings & Audi A4 Differential Pinion Bearing. Shop Audi A4 Pinion Gear Bearings. Browse Audi A4 Pinion Gear Bearings Replacement. Maintaining the rear pinion bearings in your Audi A4 is crucial for a smooth and quiet drivetrain operation. Regularly check for signs of wear, such as unusual noises or vibrations from the differential area, which may suggest the need for a replacement. To extend their lifespan, ensure proper lubrication and avoid overloading your vehicle. When selecting new bearings, opt for high-quality OEM or aftermarket options designed specifically for the A4, with features like high-grade steel construction for durability and precision engineering for a seamless fit. Always follow manufacturer guidelines during installation to guarantee optimal performance and longevity, enhancing your online shopping experience with confidence in the parts you purchase.