Unity 15903 Suspension Strut and Coil Spring Assembly - Rear Left

Rear Left Strut Assembly for Highlander and RX

Unity 15903 is a pre-assembled rear left suspension strut and coil spring assembly built for direct replacement on select Toyota Highlander and Lexus RX applications. It arrives fully assembled for plug-and-play installation, helping reduce service time on rear suspension repairs.

• Pre-assembled complete strut assembly with coil spring and top mount
• Rear left position replacement
• Built to OEM specifications for fit and function
• Compressed length: 15.41 in; extended length: 22.925 in
• Travel length: 7.515 in; body length: 14.31 in
• Economy-grade suspension replacement from Unity Automotive

Product Line Details

Unity Automotive focuses on aftermarket suspension components and has more than 40 years of manufacturing experience. This complete strut assembly is part of Unity’s pre-assembled suspension line, which is intended to simplify replacement by combining the strut, coil spring, and top mount into one ready-to-install unit. Part number 15903 is built for applications that call for a rear left strut assembly on the Toyota Highlander and Lexus RX platform.

Fits 2004-2007 Toyota Highlander, rear left. Fits 2004-2006 Lexus RX330, rear left. Fits 2007-2009 Lexus RX350, rear left. This part cross-references Monroe Shocks & Struts (e.g., 182216) for the same application.

Common Repair Uses

• Rear suspension noise from a worn strut mount or spring seat
• Uneven ride height at the rear left corner
• Excessive bouncing or reduced damping performance
• Clunking or rattling from a fatigued strut assembly
• Replacement after corrosion or age-related suspension wear

Installation Notes

Verify rear left fitment before ordering. This assembly excludes front wheel drive and vehicles with air suspension. Confirm the vehicle is a 2004-2007 Toyota Highlander, 2004-2006 Lexus RX330, or 2007-2009 Lexus RX350 with the correct rear left suspension configuration. Because the unit is fully assembled, installation is more straightforward than rebuilding a strut from separate components.

Quality Assurance

Unity builds suspension parts to OEM specifications and backs its aftermarket lineup with a customer satisfaction guarantee. Part number 15903 is engineered for consistent fitment and dependable service in the listed Toyota Highlander and Lexus RX rear left applications.