GKN Loebro 305123 CV Joint Boot Kit

OE-Quality CV Joint Boot Kit

GKN Loebro 305123 is a premium OE-quality CV joint boot kit built for exact-fit driveline repair. It is designed for Audi A4 Quattro, S4, and RS4 applications where a damaged boot can expose the joint to contamination and grease loss.

With rubber construction, a solid boot design, and application-specific dimensions, this GKN Loebro 305123 boot kit supports a precise replacement on the correct inner joint location.

Key Features

• Rubber CV joint boot with black finish
• Solid boot design with one rib
• Joint end inside diameter: 2.307 in.
• Shaft end inside diameter: 0.866 in.
• Vented boot: No
• OE-quality replacement from GKN Loebro

Detailed Product Overview

This CV Joint Boot Kit is made for driveline service where the original boot has torn, slipped, or become porous. GKN Automotive emphasizes exact fit and correct material selection for reliable protection, and this part follows that approach with a rubber boot matched to the listed application. For Audi A4 Quattro, Audi S4, and Audi RS4 driveline repair, the GKN Loebro 305123 helps restore the protective seal around the CV joint and maintain proper lubrication.

This part cross-references Audi OE numbers 8E0498201A and 8E0498201F for the same application.

What It Helps Fix

• Torn CV boot that allows grease to escape
• Boot slippage that leaves the joint exposed
• Porous boot material that no longer seals properly
• Contamination from road debris and moisture
• Noise or wear caused by loss of CV joint lubrication

Installation Notes and Fitment

Use this boot kit only on the listed inner CV joint positions. Exact fit matters, especially on Audi A4 Quattro, Audi S4, and Audi RS4 driveline applications. Verify the joint end and shaft end dimensions before installation, and confirm the original boot material matches the replacement requirement when the vehicle was equipped with a TPE-style boot.

• Fits 2005-2009 Audi A4 Quattro, rear right inner
• Fits 2005-2009 Audi A4 Quattro, rear left inner
• Fits 2006-2009 Audi S4, rear right inner
• Fits 2006-2009 Audi S4, rear left inner
• Fits 2005-2008 Audi A4 Quattro, front right inner
• Fits 2005-2008 Audi A4 Quattro, front left inner
• Fits 2008 Audi RS4, rear right inner, fits vehicles up to June 2008
• Fits 2008 Audi RS4, rear left inner, fits vehicles up to June 2008
• Fits 2007-2008 Audi RS4, rear right inner
• Fits 2007-2008 Audi RS4, rear left inner
• Fits 2008 Audi S4, rear right inner, fits vehicles up to June 2008
• Fits 2008 Audi S4, rear left inner, fits vehicles up to June 2008
• Fits 2006 Audi A4 Quattro, rear right inner, transmission shafts for rear axle with a diameter of 75.5 [1YF]
• Fits 2006 Audi A4 Quattro, rear left inner, transmission shafts for rear axle with a diameter of 75.5 [1YF]
• Fits 2005 Audi A4 Quattro, rear inner
• Fits 2005 Audi A4 Quattro, rear right inner, from VIN 8E-3-134 001; from 08/2002; to 12/2004
• Fits 2005 Audi A4 Quattro, rear left inner, from VIN 8E-3-134 001; from 08/2002; to 12/2004
• Fits 2004-2005 Audi S4, rear inner
• Fits 2004 Audi A4 Quattro, rear inner, rubber CV joint boot kit with closure cap
• Fits 2002 Audi A4 Quattro, rear inner, rubber CV joint boot kit with closure cap
• Fits 2004 Audi A4 Quattro, front inner, rubber CV joint boot kit with closure cap
• Fits 2003-2004 Audi A4 Quattro, rear right inner, from VIN 8E-3-134 001; from 08/2002; from VIN 8E-2-000 001; to 12/2004; to VIN 8E-5-400 000
• Fits 2003-2004 Audi A4 Quattro, rear left inner, from VIN 8E-3-134 001; from 08/2002; from VIN 8E-2-000 001; to 12/2004; to VIN 8E-5-400 000
• Fits 2003 Audi A4 Quattro, rear right inner, from VIN 8E-2-000 001; to VIN 8E-5-400 000
• Fits 2003 Audi A4 Quattro, rear left inner, from VIN 8E-2-000 001; to VIN 8E-5-400 000

Quality Assurance

GKN Loebro is part of GKN Automotive, a global driveline systems supplier known for OE-quality replacement components. The 305123 boot kit is built to match the application-specific fit and material requirements needed for proper CV joint protection.