A Lexus Mechanic's Guide to the 2013-2019 GS300 Disc Brake Hardware Kit
Eliminate brake noise and ensure proper brake function on your Lexus GS300 by understanding and choosing the right hardware.
- Always replace your disc brake hardware with every brake pad change to prevent noise and ensure even wear.
- For F-Sport models prone to squealing, using OEM hardware and the latest TSB-updated brake pads is the most reliable fix.
- Symptoms like rattling, uneven pad wear, and pulling can all be traced back to faulty or worn-out brake hardware.
- Cleaning rust from the caliper bracket where the clips sit is a critical step during installation for proper fit and function.
Is Your Lexus Making Brake Noises? It Might Be Your Hardware.
If you're hearing a rattling, clicking, or persistent squealing from your brakes, especially at low speeds, your first thought might be worn-out brake pads. While that's often the case, worn or missing disc brake hardware is a common and frequently overlooked cause. On the 2013-2019 Lexus GS series, especially F-Sport models, the right hardware is critical for quiet, smooth braking. These components are exposed to intense heat, moisture, and road salt, causing them to rust, lose tension, or break over time. When this happens, brake pads can vibrate or stick, leading to noise and uneven wear.
A Note on Model Year and Name
While this guide is for the vehicle specified as the 2013-2019 Lexus GS300, please be aware that in the North American market, the primary model sold in this period was the GS350. The brake systems are very similar or identical, and this information applies directly to the GS350 as well. F-Sport models may have different brake components than base models.
Known Issues for This Vehicle
Lexus has issued several Technical Service Bulletins (TSBs) related to front brake noise on the 2013-2020 GS models. These bulletins specifically address squealing or squeaking noises, a common complaint from owners, particularly those with 2WD F-Sport models. The official fix often involves installing an updated set of OEM brake pads and shims designed to eliminate the vibration that causes the noise. 🎬 Watch this video to hear the specific F-Sport brake squeak. This highlights the sensitivity of the GS braking system and why using the correct, high-quality hardware is so important.
Additionally, a recall was issued for some 2013 GS350 models for a faulty brake pedal switch, which could cause the car to brake on its own. This is unrelated to the hardware kit but is an important safety note for owners of early models in this generation.
Choosing the Right Aftermarket Hardware Kit
When you replace your brake pads, it is a non-negotiable best practice to also replace the hardware. Most quality aftermarket pad sets include a new hardware kit. If they don't, you must purchase one separately. Re-using old, rusted, or heat-fatigued clips is a recipe for noise and performance problems.
OEM vs. Aftermarket Quality
For the Lexus GS, there's a strong case for using Original Equipment (OEM) parts, especially for the noise-prone F-Sport models. Lexus owners and technicians in forums frequently report that aftermarket parts, even from top brands, can cause squealing that OEM parts solve. However, high-quality aftermarket brands can offer excellent performance and value, especially for non-F-Sport models.
- Tier 1: OEM-Equivalent Brands: Beck Arnley is a brand known for sourcing parts directly from OEM suppliers. If you want near-OEM quality without the dealership price, this is a strong choice. Brands like Advics and Akebono are the actual original manufacturers for Lexus brakes and are excellent choices if you can find them.
- Tier 2: Quality Aftermarket: Brands like Centric and Carlson offer reliable, standard replacement hardware that meets or exceeds basic requirements. These are a solid, cost-effective choice for daily driving, particularly on base model vehicles where brake noise is less of a persistent issue.
- Tier 3: Economy Brands: While not listed, be cautious with the cheapest available options. These kits may use inferior materials that can rust quickly and lose their spring tension, leading you right back to the noise and wear problems you were trying to solve.
| Part Type | Estimated Price Range |
|---|---|
| New Aftermarket Hardware Kit | $10.79 - $32.37 |
| New OEM Hardware Kit (Dealer) | $40 - $75 |
Frequently Asked Questions (FAQ)
Do I absolutely have to replace my brake hardware with every brake job?
Yes. It is a non-negotiable rule for a proper brake job. The old clips have been through thousands of heat cycles, which weakens the metal. They are also often covered in rust and brake dust. For the low cost of a new kit, you ensure your new pads work correctly and quietly.
Can old hardware really cause my car to pull to one side?
Indirectly, yes. If a guide pin (often included in more comprehensive kits) seizes due to a torn boot or lack of lubrication, or if a pad gets stuck because of a rusted abutment clip, the caliper on that wheel may not apply or release pressure correctly. This can cause the car to pull to one side when you brake.
Why is brake noise such a common problem on the GS F-Sport?
The F-Sport models use larger, multi-piston fixed calipers, which are a higher-performance design. This type of brake system can be more susceptible to high-frequency vibrations (squeal) if the pad, shim, and hardware combination isn't perfect. 🎬 See a complete walkthrough of F-Sport front brake replacement. This is why Lexus has released updated TSB parts to address the issue.
What is the difference between a front and rear hardware kit?
The front and rear brakes on your GS300/GS350 are different sizes and use different caliper designs. The hardware is specific to each axle. You cannot use a front kit on the rear brakes or vice-versa. Always ensure you are buying the correct kit for the axle you are servicing.
🎬 Follow this guide for replacing your rear brakes and hardware.Helpful Videos
Technical Specifications
OEM Part Numbers: 04945-30340
Kit typically includes anti-rattle clips and springs. Materials are usually stainless steel for OEM and high-quality aftermarket, or plated steel for economy versions.
We Have This Part in Stock
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 GS300: