Lexus RX330 (2004-2006) Automatic Transmission Mount Replacement Guide
Experiencing clunks or vibrations in your RX330? It might be time to inspect your transmission mount.
- Common failure symptoms include clunking noises when shifting and excessive vibration at idle.
- There are no recalls or major TSBs specifically for the transmission mount on the 2004-2006 RX330.
- Aftermarket mounts from brands like Anchor and DEA are known to be harder and may increase cabin vibration compared to OEM.
- For best results and to maintain the Lexus ride quality, using an OEM mount is highly recommended by owners.
Is Your Lexus RX330 Shaking or Making Clunking Noises?
If you've noticed a new vibration in the cabin, especially when the car is stopped and in gear, your transmission mount may be failing. A common symptom is a distinct "clunk" or "thump" when you shift from park into drive or reverse, or during hard acceleration. These signs indicate the mount is no longer holding the transmission securely, allowing for excessive movement.
Don't Ignore a Failing Mount
While you can still drive with a worn transmission mount, it's not recommended for long. The excessive movement can put stress on other components like engine mounts, CV axles, and exhaust connections, leading to more expensive repairs down the road.
Choosing the Right Aftermarket Transmission Mount
For the 2004-2006 RX330, the original equipment (OEM) mount is a high-quality, hydraulic-filled part designed for optimal vibration damping. Aftermarket options are available and can offer significant cost savings, but quality can vary greatly.
Aftermarket Brand Tiers for Your RX330
- Premium Aftermarket (Beck Arnley): Beck Arnley often sources parts that match original factory specifications and is a well-regarded brand for Japanese vehicles. While generally considered a higher-quality aftermarket option, some forum users have reported mixed experiences, suggesting that even premium aftermarket parts can sometimes fall short of OEM standards.
- Standard/Economy Aftermarket (Anchor, DEA, Pioneer): Brands like Anchor and DEA are widely available and very affordable. However, forum discussions frequently mention that these mounts can be made of harder rubber, leading to increased cabin vibration compared to the original part. There are also reports of premature failure, sometimes within a few months. These may be a budget-friendly short-term solution, but they are unlikely to provide the same longevity or ride quality as the OEM part.
Pro-Tip: Many RX330 owners and mechanics recommend using an OEM mount for this specific part to retain the vehicle's smooth, quiet ride. If you do choose an aftermarket part, be aware that you may experience more noticeable vibration at idle.
| Item | Estimated Cost |
|---|---|
| New OEM Part | $70 - $120 |
| New Aftermarket Part | $73.83 - $91.00 |
| Shop Labor | $150 - $300 |
| Total (Aftermarket Part + Labor) | $223 - $391 |
| Total (OEM Part + Labor) | $220 - $420 |
Frequently Asked Questions
Is there a recall on the transmission mount for the 2004-2006 RX330?
No, there are no specific recalls for the transmission mount on the 2004-2006 Lexus RX330. There was a recall for a crankshaft pulley issue that could affect the power steering belt, but this is unrelated to the transmission mount.
Can I replace the transmission mount myself?
Yes, this is a feasible DIY job for someone with moderate mechanical experience. The process involves safely supporting the transmission with a jack and a block of wood, removing the old mount, and installing the new one. It requires removing several bolts and maneuvering in a tight space.
How many transmission mounts does the Lexus RX330 have?
The Lexus RX330 has a system of several mounts to support the engine and transmission. The most commonly replaced mount due to failure symptoms is the main automatic transmission mount, often referred to as the left-side mount. It's a good idea to inspect all mounts when you suspect one has failed.
Will a new transmission mount fix my car's vibration?
If the mount is worn out, replacing it should significantly reduce or eliminate clunking noises and excessive vibrations, especially when shifting gears. However, some RX330 owners report persistent vibration at idle even after replacing mounts, which can sometimes be related to other factors or the use of hard, low-quality aftermarket mounts.
Technical Specifications
OEM Part Numbers: 12371-20060 12371-0A060
The 2004-2006 Lexus RX330 uses a system of mounts to secure the engine and transmission. The primary automatic transmission mount is located on the driver's side of the engine bay. The OEM part is typically a hydraulic-filled design for superior vibration damping.
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 RX330: