Gabriel Ultra ReadyMount Rear Left Strut Assembly for 99-03 Lexus

In this review of the Gabriel Ultra ReadyMount rear left strut assembly for the 99-03 Lexus RX300 FWD, the bottom line is simple: it is for owners who want a fast, safe replacement without handling spring compression. The preassembled unit saves time and reduces risk during installation, offering a direct fit and improved ride feel compared with worn originals. For DIYers and independent shops looking for a complete, ready-to-install option that includes the mount, bumper, boot and coil spring, this ReadyMount cuts labor and complexity while maintaining a familiar suspension feel.

Key Features

• Preassembled ReadyMount: Arrives complete with upper mount, strut bumper, boot and coil spring so no spring compression is required during installation, reducing shop time and hazard.
• Direct fitment: Built to fit 99-03 Lexus RX300 FWD vehicles, delivering a precise replacement that matches OE geometry and mounting codes.
• Concrete dimensions: Includes extended length 25.94 in, collapsed length 17.83 in and stroke 8.11 in so installers know the physical match before purchase.
• Included components: The assembly is fully loaded with spring seat and Ultra strut, which simplifies ordering by eliminating separate part matching.
• Durability focus: Gabriel designs these ReadyMounts for long term use, offering an engineered assembly intended to restore ride quality and function.

Who It's For

This is a good choice for DIY mechanics and independent repair shops replacing a failed rear left strut on a 99-03 Lexus RX300 FWD who want a fast, lower-risk install. The preassembled format is especially useful for anyone without a spring compressor or who prefers to avoid extra shop labor and tooling.

It is not aimed at drivers who want performance-tuned or adjustable suspension components; those seeking custom spring rates or motorsport setups should look for aftermarket coilovers or performance struts. Also, if exact OE part number matching is required for warranty reasons, confirm interchange numbers before ordering.

Pros & Cons

Pros

• Preassembled unit significantly reduces installation time and eliminates spring compression tasks.
• Direct fitment for 99-03 Lexus RX300 FWD gives a reliable replacement with correct mounting codes and dimensions.
• Includes all mounting components so fewer separate parts are needed and ordering is simpler.
• Many customers report improved ride quality and perceived value for the money.

Cons

• Durability reports are mixed among users, so long-term life may vary by driving conditions and vehicle history.
• Some owners report occasional front-end squeaks after installation, which could require minor additional adjustments.

Specifications

Vehicle Fitment	99-03 Lexus RX300 FWD
Extended Length	25.94 in
Collapsed Length	17.83 in
Stroke	8.11 in
Upper Mount Code	TMT3S
Lower Mount Code	CL3
Interchange Part Numbers	172104, 815030, LS54-94851L, G57612

Our Verdict

The Gabriel Ultra ReadyMount rear left strut assembly is a practical, cost-effective choice for 99-03 Lexus RX300 FWD owners who value a quick, safer DIY or shop install and want to restore ride quality without sourcing separate parts. While long-term durability varies with use, the complete preassembled design and correct fit make it a sensible replacement that usually delivers solid value and easier installation compared with traditional separate-component strut jobs.

Frequently Asked Questions

Will this fit my RX300?
Yes, it is specified for 99-03 Lexus RX300 FWD; verify your vehicle year and side (rear left) before ordering.

Does it include the spring and mount?
Yes, the ReadyMount arrives fully assembled with upper mount, spring, bumper and boot for direct installation.

Do I need a spring compressor to install it?
No, because the assembly is preassembled you do not need a spring compressor to replace the strut.