Unity 15901 Suspension Strut and Coil Spring Assembly - Rear Left

Rear Left Complete Strut Assembly

Unity 15901 is a pre-assembled rear left suspension strut and coil spring assembly for select Toyota Highlander and Lexus RX applications. It arrives fully assembled for direct replacement service, helping reduce teardown time during suspension repair.

Built to OEM specifications, this Unity suspension strut assembly is intended for 2004-2007 Toyota Highlander rear left, 2004-2006 Lexus RX330 rear left, 2006-2007 Lexus RX400h rear left, and 2007 Lexus RX350 rear left applications with the listed exclusions.

Key Features

• Pre-assembled complete strut assembly with coil spring and top mount
• Ready-to-install, plug-and-play style replacement
• Rear left position for select Toyota Highlander and Lexus RX models
• OEM-spec construction for direct-fit suspension service
• Unity part number 15901 for application matching and catalog lookup
• Cross-reference: Toyota OE-style applications including 48510A9220 and 48510A9360

Detailed Description

Unity Automotive has more than 40 years of aftermarket suspension manufacturing experience, and the 15901 assembly reflects that focus with a fully assembled design for service efficiency. The unit is built for the rear left corner and covers select Toyota Highlander, Lexus RX330, Lexus RX400h, and Lexus RX350 vehicles from the 2004-2007 model years, with exclusions for all-wheel drive and air suspension where noted. The assembly dimensions include a compressed length of 17.32 inches, travel length of 6.99 inches, extended length of 24.31 inches, and body length of 17.007 inches.

This part number 15901 is a practical replacement choice when servicing worn rear suspension components on a Toyota Highlander or Lexus RX platform. It is listed as an economy-grade assembly and is designed to restore the original strut-and-spring layout without requiring separate component assembly during installation.

Common Repair Symptoms

• Rear suspension noise from a worn strut assembly
• Uneven ride height or sagging at the rear left corner
• Excessive bouncing or reduced damping control
• Clunking or looseness from the upper strut mount area
• Need for a direct replacement during suspension refresh on Toyota Highlander or Lexus RX models

Installation Notes

Verify vehicle configuration before ordering. This assembly excludes all-wheel drive and vehicles with air suspension on the listed Lexus applications, and excludes all-wheel drive on the listed Toyota Highlander application. Confirm rear left placement, model year, and OE interchange before installation. Because the unit is fully assembled, it is suited to faster suspension service than rebuilding a strut from separate components.

Quality Assurance

Unity positions this suspension line around OEM-spec manufacturing and long-term aftermarket service experience. The brand states that its suspension systems are built to meet original-equipment specifications and backed by a customer satisfaction commitment.