KYB SB124 Suspension Strut Bellows - Rear

KYB Strut Boot Kit for Rear Suspension

KYB SB124 is a rear suspension strut bellows kit built to shield the strut shaft from road grit and moisture. It is a direct-fit style solution for select Audi, BMW, Ford, and Volkswagen applications, including rear strut service on Audi A4, Audi S4, Audi TT Quattro, BMW X3, Ford Fiesta, and Volkswagen Passat models.

Key Features

• Superior-quality boot helps protect the strut shaft from dirt and debris that can lead to seal wear and fluid loss
• Poly foam bumper limits travel and helps prevent the strut from bottoming out
• Protects the upper seal and bushing from abrasive contamination
• Built to match or exceed OE design and quality targets
• Designed specifically for European cars

Product Details

The KYB Boot Kits line focuses on protecting suspension components that are exposed to harsh road conditions. This KYB SB124 strut boot covers the shaft with a durable plastic bellows to help keep out dust, sand, salt, and other debris. By reducing contamination at the polished shaft, upper seal, and bushing, it supports longer strut service life and helps maintain consistent rear suspension performance. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Compatible With rear suspension service on 2014-2019 Ford Fiesta, 2008-2017 Audi S5, 2009-2016 Audi A4 with sport suspension except adaptive suspension, 2010-2016 Audi A4 Quattro, 2010-2016 Audi S4, 2013-2015 Audi RS5, 2008-2015 Audi TT Quattro, 2012-2013 Volkswagen Golf R, 2004-2010 BMW X3, 2008-2009 Audi TT, 2007-2008 Audi RS4, 1998-2005 Volkswagen Passat, 2004 Audi A4 without sport suspension to 11/04, 2004 Audi A4 Quattro without sport suspension to 11/04, and 2002-2003 Audi A4 and Audi A4 Quattro without sport suspension.

What It Helps Address

• Strut shaft wear caused by dirt, dust, sand, and salt
• Seal damage that can contribute to fluid leakage
• Bushing wear from abrasive road contamination
• Excessive suspension travel that can lead to bottoming out
• Impact-related stress on nearby suspension components

Installation Notes

Install during rear strut service or replacement so the boot and bumper can be inspected with the suspension disassembled. Confirm the vehicle’s suspension configuration before ordering, especially on Audi A4 and A4 Quattro models with sport suspension or adaptive suspension notes. Verify rear application and model-year coverage against the vehicle build data before installation. KYB SB124 is intended for rear use only on the listed applications.

Quality Assurance

KYB is an OE supplier known for suspension components engineered to OE-style fit and function. The SB124 boot kit is built to the same design and quality expectations used for European vehicle applications, with attention to shaft protection, seal shielding, and travel control.