KYB SM5890 Shock Mount - Rear Upper

KYB Rear Upper Strut Mount for Mazda SUVs

KYB SM5890 is a rear upper suspension shock absorber mount built for Mazda applications that need a direct OE-style replacement. It helps restore quieter operation, steadier suspension response, and more consistent steering feel when original mounts have worn, hardened, or started transmitting extra vibration.

Compatible with select Mazda CX-3, CX-5, CX-9, Mazda 3, and Mazda 6 applications, this KYB Mount Components part is engineered around the vehicle-specific fitment requirements of each platform. The SM5890 part number is used where a rear upper mount is specified for the listed models.

Key Features

• OE-quality replacement strut mount for rear upper suspension locations
• Engineered specifically for Mazda SUVs and related Mazda platforms
• Superior rubber construction helps reduce noise, vibration, and harshness
• Mount bearings support smoother steering response and front-end alignment retention
• Matched-grade studs and nuts help maintain proper assembly fit
• Designed to cushion road impacts and reduce jarring through the suspension

Detailed Product Overview

KYB Mount Components focuses on restoring the function of worn suspension mounting points rather than masking the symptoms. On vehicles such as the Mazda CX-3, CX-5, and CX-9, as well as Mazda 3 and Mazda 6 models, a worn rear upper mount can allow extra road noise, vibration, and harshness to enter the cabin. KYB SM5890 is built to replace that worn interface with an application-specific component that supports suspension movement more cleanly.

This part cross-references Mazda TK5228380B and TK5228380C for the same application. The KYB SM5890 is a practical choice when servicing a rear upper suspension shock absorber mount on 2013-2021 Mazda applications listed below.

What It Helps Address

• Clunking or rattling from worn rear upper mount components
• Excess vibration transferred into the cabin from hardened insulators
• Harsh ride feel over bumps and uneven pavement
• Reduced steering smoothness caused by worn mount bearings
• Front-end alignment concerns related to degraded bearing plate support

Fitment and Installation Notes

• Fits 2016-2021 Mazda CX-3, Rear Upper
• Fits 2014-2018 Mazda 3, Rear Upper
• Fits 2018 Mazda CX-5, Rear Upper
• Fits 2013-2016 Mazda CX-5, Rear Upper
• Fits 2018 Mazda CX-9, Rear Upper
• Fits 2014-2017 Mazda 6, Rear Upper
• Fits 2017 Mazda CX-5, Rear Upper, FROM 10-1-2017
• Fits 2014 Mazda 3 Sport, Rear Upper

Verify the rear upper mount location and model year break before installation, especially on 2017 Mazda CX-5 applications with the 10-1-2017 note. Replace related suspension wear items as needed during service, and follow the vehicle service manual for torque specifications and alignment checks after installation.

Quality Assurance

KYB is known for OE-style suspension replacement components, and the Mount Components line is built to match application-specific requirements for fit and function. SM5890 is designed to deliver the same type of mounting support expected in original-equipment service for the listed Mazda vehicles.