Rear Differential Service Kit | Audi B9/B9.5 S4, S5, SQ5 (w/o Sport Diff) | Genuine Audi

Overview

Keep your Audi B9 S4/S5 rear differential operating smoothly with this complete rear differential service kit. Designed for routine maintenance and fluid replacement, the kit provides the essential fluid and service components needed to properly service the rear differential on compatible B9-platform Audi models.

Regular differential fluid service helps maintain proper lubrication, reduce wear, and ensure smooth operation of the rear drivetrain—especially on vehicles that see spirited driving, increased power, or frequent hard use.

Details

Kit Includes:

• 1x Rear differential gear oil
• 2x Fill/drain plugs
  

Why Service the Rear Differential?
Differential fluid degrades over time due to heat, mileage, and mechanical load. Fresh fluid helps maintain proper lubrication of the differential gears and bearings, helping protect the drivetrain and maintain smooth, quiet operation.

Recommended For:

• Routine preventative maintenance
• Higher-mileage vehicles
• Modified or tuned vehicles
• Vehicles used for spirited or performance driving
• Customers performing a complete drivetrain fluid service

Important:
Always verify the vehicle's model year, drivetrain configuration, and differential type before ordering. Fluid specification and service components can vary depending on the exact vehicle configuration.

Fitment