1997 Lexus ES300 Struts and Insulators
Do not order 903904 as an upper rear insulator or 904953 as a lower insulator until the component positions are confirmed for the 1997 Lexus ES300. “Insulator,” “mount” and “spring seat” can describe different pieces. A product picture is helpful, but the application and parts diagram must settle the identification.
Identify the worn rear component
The owner needs upper and lower rear strut insulators and also wants front and rear struts. Have the installer identify whether each worn piece is a rubber spring isolator, an upper mounting component or another part of the assembly. Compare the exact axle position, side and catalog description before selecting the number.
Keep the two part numbers distinct
Use 904953 and 903904 as inquiry references, not interchangeable labels. Check the removed part’s markings and the vehicle diagram. Similar-looking rubber pieces can have different seating shapes or dimensions; an upper component should not be inferred from a lower component’s listing.
Choosing replacement struts
For factory-style replacement, compare the correct KYB GR2/Excel-G application and any other OE-style strut option. Select front and rear applications separately. A bare strut order should not be assumed to include the insulators or mounts mentioned in the question.
Build the parts order around the inspection
Inspect spring seats, boots, bump stops and mounts while planning the strut replacement. Reuse only serviceable components and replace damaged ones with exact application parts. Loaded spring assemblies require suitable equipment and procedures. Send the proposed numbers and the component locations with the vehicle details if the listing terminology remains unclear.
Related guides
Frequently asked questions
Can 903904 be assumed to be the upper rear insulator?
No. Confirm the component identity and position in the vehicle application before ordering.
Will a bare replacement strut include insulators?
Do not assume so. Check package contents and order any required mounts or isolators separately.
Get help choosing the right parts
Contact Shockwarehouse with your vehicle or chassis details and the parts you are considering.
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