If you own a 2012 Lexus ISF and need to replace or upgrade suspension components, having the correct OEM part numbers is essential. Using genuine Lexus parts ensures proper fitment, performance, and durability. This guide provides a comprehensive list of OEM suspension part numbers for the 2012 ISF, along with explanations of each component and installation tips. Whether you're doing the work yourself or ordering parts for a shop, this information will help you get the right parts the first time.
Shop on Amazon
Browse the latest options and prices.
Detroit Axle - RWD Strut Kit for 2006-2013 Lexus IS250 IS350 [Sedan] 4 Front and Rear Struts Coil Sp
Front Suspension Parts
The front suspension of the 2012 ISF uses a MacPherson strut design with coil springs and an anti-roll bar. Key components include strut assemblies, lower control arms, and stabilizer links.
Front Strut Assembly
The front strut combines the shock absorber and spring. For the 2012 ISF, OEM part numbers vary by side and whether the car has adaptive suspension (AVS).
- Left Front Strut (without AVS): 48510-53A00
- Right Front Strut (without AVS): 48520-53A00
- Left Front Strut (with AVS): 48510-53A10
- Right Front Strut (with AVS): 48520-53A10
If your ISF has the adaptive variable suspension, ensure you order the AVS-specific struts. Non-AVS struts have a different damping characteristic and electrical connector.
Front Coil Spring
OEM front springs are color-coded for rate. The part number is the same for both sides during production, but the spring itself may have a paint mark indicating its rate class.
- Front Coil Spring: 48131-53A00
When replacing springs, always replace in pairs and use the same rate class. The spring rate is not adjustable; choose the standard OEM spring unless you plan to modify.
Front Lower Control Arm
The lower control arm includes the ball joint and rear bushing. Lexus sells the arm as a complete assembly.
- Left Front Lower Control Arm: 48068-53A00
- Right Front Lower Control Arm: 48069-53A00
The ball joint is not serviceable separately; you must replace the entire arm if the ball joint is worn.
Front Stabilizer Bar and Links
The front stabilizer bar reduces body roll. The links connect the bar to the strut.
- Front Stabilizer Bar: 48810-53A00
- Front Stabilizer Link (each side): 48820-53A00
Replacing stabilizer links is common as they wear over time. Always replace both sides at once.
Rear Suspension Parts
The rear suspension is a multilink design with separate shock absorbers and coil springs.
Rear Shock Absorber
Like the front, rear shocks have AVS and non-AVS variants.
- Left Rear Shock (without AVS): 48530-53A00
- Right Rear Shock (without AVS): 48540-53A00
- Left Rear Shock (with AVS): 48530-53A10
- Right Rear Shock (with AVS): 48540-53A10
Shocks should always be replaced in pairs (both left and right) to maintain balance.
Rear Coil Spring
Rear springs are also color-coded.
- Rear Coil Spring: 48231-53A00
If you are lowering the vehicle, aftermarket springs are available, but this guide focuses on OEM parts.
Rear Lower Control Arm (LCA)
The rear LCA has an integrated ball joint.
- Left Rear Lower Control Arm: 48730-53A00
- Right Rear Lower Control Arm: 48740-53A00
Rear Upper Control Arm
- Left Rear Upper Control Arm: 48710-53A00
- Right Rear Upper Control Arm: 48720-53A00
Rear Toe Control Arm
Toe adjustment is handled by a separate arm.
- Left Rear Toe Control Arm: 48760-53A00
- Right Rear Toe Control Arm: 48770-53A00
Rear Stabilizer Bar and Links
- Rear Stabilizer Bar: 48820-53A00 (Note: this part number also appears for front links; confirm application)
- Rear Stabilizer Link (each side): 48830-53A00
The rear bar and links are smaller than the front.
Bushings and Mounts
Bushings degrade over time and can cause noise and poor handling. While some come with control arms, others are sold separately.
Front Control Arm Bushing (Rear Mount)
If the rear bushing of the front LCA is bad, you can press in a replacement.
- Bushing (Front LCA Rear): 48075-53A00
Front Strut Mount
The strut mount includes a bearing for steering.
- Front Strut Mount (left or right): 48609-53A00
Rear Shock Mount
- Rear Shock Mount (top): 48575-53A00
Rear Subframe Bushings
- Rear Subframe Bushing (each): 48157-53A00
These are large bushings that can cause rear-end looseness when worn.
Where to Verify Part Numbers
Always verify part numbers with a Lexus dealer or a reputable OEM parts website before ordering. Production changes may occur, and some parts may supersede. The 2012 ISF may have unique compatibility compared to earlier or later model years. Use your VIN with any parts lookup tool to confirm fitment. Avoid using third-party marketplaces that don't guarantee OEM authenticity.
Installation Tips
- If replacing struts or shocks, have the vehicle aligned afterward.
- When removing strut assemblies, compress the spring safely using a proper spring compressor.
- Torque all suspension bolts to factory specifications while the vehicle is on the ground (suspension loaded).
- Replace hardware (nuts, bolts) if they are one-time-use or have thread-locker.
- If your ISF is equipped with AVS, be careful not to damage the electrical connectors. Disconnect the battery before working near sensor wires.
Frequently Asked Questions
Q: Can I use parts from a 2011 ISF on my 2012? Most front and rear suspension parts are interchangeable between 2011 and 2012, but check the specific part number. The 2012 model has some unique updates, especially for AVS components.
Q: How long do OEM shocks last? Typically 60,000 to 80,000 miles depending on road conditions. If you notice fluid leaks or bouncy ride, replace them.
Q: Should I buy OEM or aftermarket? OEM parts are designed specifically for the ISF and will maintain factory ride quality and handling. Aftermarket parts may offer adjustability or lower cost but often compromise comfort or longevity.
Practical Recommendation
For a stock 2012 ISF that needs suspension refresh, the most important parts to replace are the struts/shocks and any worn bushings. Begin by inspecting the stabilizer links and control arm bushings. If you are not planning to lower the car or modify the suspension, stick with OEM parts for the best reliability. Order from a Lexus dealership or a trusted online OEM parts retailer using the part numbers listed above. Always replace components in axle pairs (both front or both rear) to ensure even performance. If you have the adaptive suspension, be certain to order the correct AVS-specific parts, or else you will trigger warning lights and lose functionality.