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

In this review of the Gabriel Ultra ReadyMount Rear Right Complete Strut Assembly, the bottom line is simple: this preassembled strut is for DIYers and repair shops replacing a rear right unit on a 99-03 Lexus RX300 FWD who want a safer, faster swap without spring compression. The reviewer found the fully loaded ReadyMount saves time by arriving as a complete assembly with upper mount, boot, bumper and coil spring already fitted, and that the fit and ride improvements are noticeable when matched to the specified vehicle fitment.

Key Features

• Preassembled ReadyMount: Arrives as a complete unit to eliminate the need for spring compression, reducing installation time and risk.
• Complete components: Includes upper strut mount, strut bumper, strut boot, coil spring and spring seat so the installer does not need separate parts.
• Vehicle fitment: Built specifically to fit 99-03 Lexus RX300 FWD applications, which helps ensure a direct replacement and correct geometry.
• Durable Ultra strut: Uses Gabriel's Ultra strut design intended to deliver consistent ride quality and long term performance for passenger cars.
• Clear interchange options: Matches multiple interchange part numbers such as 172103, LS57613 and G57613 to aid identification and ordering.

Who It's For

This product is aimed at owners of a 99-03 Lexus RX300 FWD, independent mechanics and experienced DIYers who prefer to replace struts without compressing springs or sourcing separate mounts and boots. The preassembled nature makes it practical for a weekend repair or a shop wanting to cut labor time.

People who should look elsewhere include owners needing front struts, those with non-FWD RX300 models, or anyone who expects an OEM lifetime warranty; some buyers reported mixed feedback on long term durability and may prefer an OEM or high-end aftermarket option for extended warranty coverage.

Pros & Cons

Pros

• Easy installation due to preassembled design, which reduces shop labor and eliminates spring compression tools.
• Good fit and ride quality reported by many customers when installed on the specified RX300 FWD application.
• Includes all required components so no additional parts are needed for a standard replacement.

Cons

• Durability feedback is mixed among users, so long term life may vary depending on driving conditions.
• Some customers reported occasional front-end squeaking after installation, which could require minor adjustment or lubrication.

Specifications

Vehicle Fitment	99-03 Lexus RX300 FWD
Stroke	8.11 in
Extended Length	25.94 in
Collapsed Length	17.83 in
Upper Mount Code	TMT3S
Lower Mount Code	CL3
Interchange Numbers	172103, 815029, LS54-94851R, G57613

Our Verdict

The Gabriel Ultra ReadyMount rear right strut assembly is a practical, time-saving replacement for 99-03 Lexus RX300 FWD owners who want a direct-fit, preassembled unit that improves ride quality and reduces installation complexity. It represents solid value for those prioritizing ease of install, though buyers seeking maximum long term durability should monitor performance over time.

Frequently Asked Questions

Is this a direct replacement for a 99-03 Lexus RX300 FWD?
Yes, it is manufactured to fit 99-03 Lexus RX300 FWD rear right applications and lists multiple interchange numbers for confirmation.

Does the ReadyMount require spring compression tools to install?
No, the assembly is preassembled and includes the spring and mount so spring compression is not required for installation.

Are all components included with the assembly?
Yes, the unit includes the upper mount, strut bumper, strut boot, coil spring, spring seat and the Ultra strut itself.