KYB SB128 Suspension Strut Bellows - Rear

KYB SB128 Strut Boot Kit Overview

KYB SB128 is a rear suspension strut bellows kit built to shield the strut shaft from dirt, dust, sand, salt, and other road debris. By covering the shaft with a durable plastic boot and adding a poly foam travel bumper, it helps protect critical strut components on applications such as the Audi SQ5, Chevrolet Impala, Buick LaCrosse, and Pontiac Bonneville.

KYB Boot Kits are part of the KYB Boot Kits product line and are made to match OE-style fit and function for rear strut protection. The SB128 is a practical choice when replacing worn or damaged strut protection on vehicles that need rear suspension service.

Key Features

• Superior-quality boot helps protect the strut shaft from leak-causing dirt and debris
• Poly foam bumper helps prevent the strut from bottoming out
• Built with design and quality that matches or exceeds OE
• Protects the upper seal and bushing from contamination and wear
• Rear suspension strut bellows for select Audi, Chevrolet, Buick, Oldsmobile, and Pontiac applications

Detailed Description

The KYB SB128 strut boot kit is engineered to cover the full strut shaft and reduce exposure to abrasive contaminants that can wear on the polished shaft, upper seal, and bushing. On rear suspension applications, that protection matters because road grime and moisture can accelerate seal damage and shorten strut service life. The included poly foam bumper adds travel control to help reduce harsh bottoming events and protect nearby suspension components from extreme movement damage. This part cross-references Monroe Shocks & Struts (e.g., 63623) for the same application.

Compatible With select rear applications including 2014-2016 Audi SQ5, 2000-2013 Chevrolet Impala, 2005-2009 Buick LaCrosse, 1997-2004 Buick Regal, and 1991-1999 Pontiac Bonneville. KYB SB128 is also listed for other rear-fitment vehicles in the same application group, including Chevrolet Impala Limited, Buick Allure, Buick Century, Buick LeSabre, Oldsmobile 88, Oldsmobile LSS, Oldsmobile Regency, Oldsmobile 98, Oldsmobile Delta 88, and Chevrolet Monte Carlo.

What It Helps Address

• Damaged or missing rear strut dust protection
• Contamination on the strut shaft from road debris
• Premature wear at the upper seal and bushing
• Harsh suspension contact from bottoming out
• Reduced protection after rear strut replacement service

Installation Notes and Tips

Install the boot on the rear strut during strut service or replacement, and inspect the shaft, seal area, and bumper contact points before assembly. Confirm rear fitment by year, make, model, and suspension configuration, since some listed vehicles exclude electronic adjustable suspension or self-leveling rear systems. For best results, replace worn boot components whenever the rear strut is serviced.

Quality Assurance

KYB builds the SB128 with OE-matching design and quality standards for rear strut protection. The boot and bumper are selected to help preserve strut integrity by limiting contamination and travel-related damage.