KYB SB146 Suspension Strut Bellows - Rear

KYB Strut Boot for Rear Suspension Protection

KYB SB146 is a rear suspension strut boot kit for select Mazda applications. It helps shield the strut shaft and seal area from road grit while adding a travel-limiting bumper for added suspension protection.

Key Features

• Protects the polished strut shaft, upper seal, and bushing from dirt, dust, sand, salt, and road debris
• Durable plastic bellows covers the strut shaft to help reduce abrasive wear
• Includes a poly foam travel-limiting bumper to help prevent bottoming out
• Direct-fit rear strut boot solution for select Mazda CX-5, Mazda 6, and Mazda CX-3 applications
• KYB Strut Boots line focus: suspension protection for struts exposed to harsh road conditions

Detailed Description

KYB SB146 is a suspension strut bellows designed to cover the rear strut shaft and help keep contaminants away from critical wear surfaces. By limiting exposure to road debris, the boot helps preserve the condition of the shaft, upper seal, and bushing. The included foam bumper adds impact protection during suspension compression, helping reduce damage from extreme movement. This part number is used on rear suspension applications for 2013-2016 Mazda CX-5, 2016-2020 Mazda CX-3, 2018-2021 Mazda 6, 2018-2019 Mazda CX-5, 2017 Mazda CX-5 from 10-1-2017, and 2020-2025 Mazda CX-5. KYB SB146 is a practical replacement choice when servicing rear strut protection on Mazda CX-5, Mazda 6, or Mazda CX-3 models.

What It Helps Address

• Strut shaft wear caused by dirt, dust, sand, and salt
• Seal contamination from road debris
• Bushing wear from abrasive particles
• Damage from suspension bottoming out
• Wear related to extreme suspension travel

Installation Notes and Tips

Install on the rear strut assembly during suspension service or strut replacement. Inspect the strut shaft, seal area, and surrounding components before installation, and replace worn parts as needed. Verify vehicle-specific rear fitment before ordering, especially on 2017-2019 Mazda CX-5 models with the listed production notes.

Quality Assurance

KYB is a recognized suspension manufacturer, and the Strut Boots line is built to provide added protection for strut assemblies in everyday driving conditions. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.