Transmission Filter Kit Guide for 2001-2006 BMW 330xi
Keep your E46's automatic transmission shifting smoothly by choosing the right filter kit.
- The 2001-2006 330xi uses a GM automatic transmission (A5S360R/A5S390R), not a ZF. You must buy a kit for the GM unit.
- Ignore BMW's "lifetime" fluid claims. Plan to service the transmission every 50,000-60,000 miles for longevity.
- Symptoms like harsh shifting, whining noises, and slipping are serious signs that your filter is clogged and needs immediate attention.
- Always buy a complete kit with a new filter and pan gasket. Premium aftermarket brands like Wix, Beck Arnley, or Rein are recommended.
Is Your 330xi's Transmission Acting Up?
The automatic transmission in your 2001-2006 BMW 330xi is a complex and expensive component. One of the most critical maintenance items for it is the transmission fluid and filter service. BMW originally called the transmission fluid "lifetime" fill, but experience has shown that this fluid breaks down and gets dirty. Changing the fluid and filter is key to a long transmission life. A clogged filter can lead to poor performance and eventually, catastrophic failure.
Transmission Identification is Key
Your 2001-2006 BMW 330xi was equipped with a 5-speed automatic transmission made by General Motors (GM), model A5S360R or A5S390R. It is crucial to ensure you are buying a kit specifically for this GM transmission, not the ZF transmission found in some other non-xi E46 models. Always verify fitment before purchasing.
Symptoms of a Clogged Transmission Filter
A failing transmission filter restricts fluid flow, essentially starving the transmission. This can cause a variety of noticeable problems:
- Harsh or Delayed Shifting: The car may hesitate or jerk when shifting between gears.
- Unusual Noises: You might hear a whining, whirring, or grinding sound that changes with engine speed.
- Transmission Slipping: The engine RPMs might increase, but the car doesn't accelerate as it should, as if it's stuck between gears.
- Fluid Leaks: Increased pressure from a clog can force fluid past seals, creating reddish fluid puddles under the car.
- Warning Lights: The transmission warning light or check engine light may illuminate on your dashboard.
Choosing the Right Aftermarket Filter Kit
For the E46 330xi, several aftermarket brands offer transmission filter kits. These kits typically include the filter, a pan gasket, and sometimes new pan bolts. Quality can vary, so it's important to choose wisely. Here’s a breakdown of common brands:
- Premium Aftermarket (Closer to OEM): Brands like Beck Arnley, CRP/Rein, and Wix are generally well-regarded in the BMW community. They often have a reputation for good fitment and quality materials that meet or exceed original specifications. A kit from one of these brands is a solid choice for reliability.
- Standard Aftermarket: Brands such as Vaico, Dorman, and ATP fall into this category. Quality can be good, but it's sometimes inconsistent. Dorman sometimes offers innovative "OE FIX" solutions. These are often more budget-friendly and can be a decent option if the premium brands are unavailable.
- Budget-Friendly: Brands like URO Parts and Premium Guard are typically the most affordable. While tempting for the price, URO Parts has a mixed reputation among BMW owners, with some reporting fitment or longevity issues. These may be suitable for a temporary fix but might not be the best long-term solution.
Pro Tip: Get a Complete Kit
Always opt for a kit that includes a new pan gasket. The original gasket on your 330xi is a metal and rubber design that often gets destroyed during removal. Some kits also include new pan bolts, which is a nice addition as the old ones can get corroded.
| Tier | Brands | Typical Price Range | Notes |
|---|---|---|---|
| Premium | Beck Arnley, CRP/Rein, Wix | $50 - $100 | Often meets or exceeds OEM standards. Recommended for best results. |
| Standard | Vaico, Dorman, ATP | $40 - $75 | Good value, generally reliable for most owners. |
| Budget | URO Parts, Premium Guard | $38 - $60 | Lowest cost, but may have variable quality. Check reviews before buying. |
Frequently Asked Questions
How often should I change my transmission filter?
Despite BMW's old "lifetime" fluid recommendation, experienced mechanics and owners suggest changing the transmission fluid and filter every 50,000 to 60,000 miles to ensure a long life for the transmission.
Do I have to change the fluid when I change the filter?
Yes. To access the filter, you must first drain the fluid and remove the transmission pan. Therefore, a filter change always includes a fluid change. You will need approximately 7 quarts of Dexron VI automatic transmission fluid for the GM transmission in the 330xi.
Is this a good DIY project for a beginner?
This job is considered intermediate to advanced. It's messy and requires the car to be safely lifted and level. The fluid level check procedure is also very specific and must be done with the engine running and the transmission at a certain temperature. If you are not comfortable with these steps, it is best to have a professional mechanic do the job.
What is the difference between a filter kit and just a filter?
A filter kit includes the filter plus the necessary gasket and sometimes bolts needed for the installation. Buying just the filter is not recommended, as you will absolutely need a new pan gasket to prevent leaks.
Are there any recalls for the 2001-2006 330xi transmission?
My search did not find any specific transmission filter or transmission failure recalls for the 2001-2006 BMW 330xi (E46 generation). Recalls found were for much newer BMW models and different issues.
Technical Specifications
OEM Part Numbers: 24117557070 24117533690
Fits GM 5L40-E (BMW A5S360R / A5S390R) 5-speed automatic transmissions. Kit should include filter and pan gasket.
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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.
- BMW 330xi: