Lexus IS350 Suspension Strut Replacement Guide (2011-2018)
Restore your IS350's sharp handling and smooth ride by choosing the right new aftermarket struts.
- Always replace struts in pairs (front or rear) to maintain balanced handling and safety.
- A four-wheel alignment is mandatory after replacing front struts to prevent premature tire wear.
- KYB is the most highly-recommended aftermarket brand for restoring the original Lexus ride quality.
- If you have an F-Sport with Adaptive Variable Suspension (AVS), you MUST buy AVS-compatible struts to retain functionality.
Is Your Lexus Ride Not What It Used to Be?
As your IS350 ages, the original struts wear out. This happens slowly, so you might not notice the change at first. But worn struts can make your car less safe and comfortable. They affect braking, handling, and overall stability. Replacing them can bring back that new-car feel. This guide focuses on new aftermarket struts for your 2011-2018 Lexus IS350.
Symptoms of Failing Suspension Struts
Look out for these common signs that your struts need replacement:
- Bouncy, Unstable Ride: The car feels floaty or bounces excessively after hitting bumps.
- Nose Dives and Body Roll: The front of the car dips down hard when you brake, or the body leans too much in corners.
- Unusual Noises: You may hear clunking, creaking, or rattling sounds from the suspension area, especially at low speeds or over rough pavement.
- Visible Fluid Leaks: Oily fluid leaking down the side of the strut body is a definite sign of failure.
- Uneven Tire Wear: Worn struts can cause tires to wear out in patches or scallops.
A Note on F-Sport Models with AVS
If your IS350 is an F-Sport model, it may have Adaptive Variable Suspension (AVS). This is an electronic system that adjusts ride firmness. Most standard aftermarket struts are NOT compatible with AVS. Installing them will result in a warning light, loss of the adjustable suspension feature, and may even alter the car's ride height. Ensure you buy struts specifically listed as compatible with AVS 🎬 Watch this DIY walkthrough for replacing front F-Sport struts. if your car is equipped with it.
Choosing the Right Aftermarket Strut Brand
When replacing original parts, quality matters. For the IS350, you have several options that balance cost and performance.
Tier 1: OEM-Equivalent Quality
KYB: This is the most recommended aftermarket brand among Lexus owners. The original struts were often made by Tokico, but since they are less common now, KYB is considered the go-to for restoring original performance. Owners report the ride is very similar to stock, perhaps slightly firmer at first before settling in. They offer a great balance of quality and price.
Tier 2: Quality Aftermarket
Monroe (OESpectrum): Monroe's premium OESpectrum line is a viable option. However, general sentiment among Lexus owners is mixed. Avoid their economy lines or complete "Quick-Strut" assemblies, as these are often criticized for poor ride quality and potential noise issues on a fine-tuned car like the IS350.
Tier 3: Economy Options
FCS Struts & PRT: These brands offer a lower price point, often as complete assemblies which can save on labor. However, there is very little owner feedback for these brands on an IS350. While they meet basic fitment needs, they may not restore the specific ride and handling characteristics of your Lexus. They are a budget choice, but the impact on ride quality is a significant unknown.
Estimated Costs for Suspension Strut Replacement
| Part Type | Estimated Cost (Per Corner) | Notes |
|---|---|---|
| New Aftermarket (Bare Strut) | $57 - $196 | Your cost for the part itself. KYB and Monroe OESpectrum fall in this range. |
| New OEM (Bare Strut/Shock) | $250 - $350 | Highest cost, but guarantees original ride quality. |
| Shop Labor | $150 - $300+ | Labor to replace one strut, including spring transfer. An alignment will be an extra charge. |
| Total Professional Job (Aftermarket, One Corner) | $207 - $496 + Alignment | This is an estimated total for one strut replacement using aftermarket parts. |
Frequently Asked Questions
Should I replace struts in pairs? 🎬 Watch a step-by-step guide for replacing the rear shocks.
Yes, always. Struts should be replaced in pairs (both front or both rear) to ensure even handling and stability. Replacing only one can lead to unpredictable steering and suspension response.
Do I need a wheel alignment after replacing struts?
Yes. Replacing a front strut will always change the wheel alignment angles. You must get a professional alignment after the job is done to prevent rapid tire wear and ensure the vehicle drives straight.
What's the difference between a bare strut and a complete strut assembly?
A bare strut is just the shock absorber body. Your mechanic must use a special tool called a spring compressor to move your old spring and mount onto the new strut. A complete assembly (or "Quick-Strut") includes a new strut, spring, and mount all in one piece. It's faster to install but may use lower quality components compared to your original Lexus spring and mount.
Are there any recalls for the 2011-2018 IS350 suspension?
No. According to NHTSA records, there are no safety recalls specifically for the suspension struts or shocks on the 2011-2018 Lexus IS350. Recalls for this vehicle primarily involve airbags and the fuel system.
Helpful Videos
Technical Specifications
OEM Part Numbers: 48510-80463
The 2011-2018 Lexus IS350 uses a MacPherson strut design for the front suspension. The rear suspension is a multi-link setup with a separate shock absorber and coil spring. F-Sport models may be equipped with electronic Adaptive Variable Suspension (AVS).
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Lexus IS350:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Lexus Ride Not What It Used to Be?
- Symptoms of Failing Suspension Struts
- A Note on F-Sport Models with AVS
- Choosing the Right Aftermarket Strut Brand
- Tier 1: OEM-Equivalent Quality
- Tier 2: Quality Aftermarket
- Tier 3: Economy Options
- Estimated Costs for Suspension Strut Replacement
- Frequently Asked Questions
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