KYB SM5646 Shock Mount - Rear Upper

KYB SM5646 Rear Upper Strut Mount

KYB SM5646 is a suspension shock absorber mount built for rear upper applications on select Audi models. It addresses the vibration, noise, and harshness that can develop when original vibration insulators harden with age, while helping restore proper suspension feel.

Compatible with 2009-2013 Audi A3 and 2009-2013 Audi A3 Quattro, rear upper, this KYB Mount Components part is engineered as an OE-quality replacement for the original mount assembly.

Key Features

• OE-quality replacement strut mount for the specified application
• Superior rubber helps reduce noise, vibration, and harshness
• Mount bearings support smoother steering response and front-end alignment retention
• Matched-grade studs and nuts for application-specific service
• Built to optimize suspension performance in the rear upper position

Product Details

KYB Mount Components focuses on replacement suspension hardware that restores the function of worn mounting points. The SM5646 uses application-specific design details to help isolate road impact and reduce the jarring effect that aging mounts can transmit into the cabin. On vehicles such as the Audi A3 and Audi A3 Quattro, a worn rear upper mount can contribute to extra cabin noise, reduced ride quality, and inconsistent suspension response. KYB SM5646 is intended to replace that worn component with a direct-fit suspension shock absorber mount for the listed vehicles.

This part cross-references Monroe Shocks & Struts 908923 for the same application.

What It Helps Address

• Clunking or knocking from a worn rear upper mount
• Excess vibration transferred into the body
• Harsh ride feel over bumps and rough pavement
• Reduced steering smoothness caused by mount wear
• Alignment instability related to deteriorated mount bearings

Installation Notes and Tips

Install KYB SM5646 only on the confirmed rear upper position for 2009-2013 Audi A3 and 2009-2013 Audi A3 Quattro with round shape bump stop and mount components notes. Inspect the surrounding strut hardware, bump stop, and related suspension parts before reassembly. After installation, verify ride height, fastener torque, and alignment condition according to vehicle service procedures.

Quality Assurance

KYB is known for OE-style suspension replacement components, and the SM5646 is built to meet the fit and function expectations of the listed application. Part number SM5646 is part of KYB’s Mount Components line, which is focused on restoring suspension isolation and steering support in serviceable replacement form.