BMW Heating & Air Conditioning for BMW 3 Series E46 (1999-2005)

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Is your BMW blowing hot air when you want AC? Not getting enough hot air when it's cold out? Well we have the heater cores, heater valves, blower motors and related parts for your BMW. Tip: Is your air conditioning / heater fan going crazy? Does it only run at one speed or not work at all? Then a likely culprit is this blower resistor, often called the "final stage unit" in the BMW world. The function of this part is to regulate the voltage of the blower motor on BMWs which use the digital climate control. This blower resistor is a notorious weakness on the cars that use it. When it fails, your blower fan speed can fluctuate as if it has a mind of its own, or get stuck at one position. BMW has updated this item several times and we only carry the most current version.

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Exterior Temperature Sensor Repair Kit - MOST BMWs (see applications)
Exterior Temperature Sensor Repair Kit - MOST BMWs (see applications)...
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:578658
Part#: 65816905133-1KT
Ships on Aug 31, 2026
Sale - Save 23% $ 96.85

This product was last offered at the strikethrough price on
05-03-2026

$ 74.70 USD
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Sale - Save 23%
$ 96.85

This product was last offered at the strikethrough price on
05-03-2026

$ 74.70 USD
Free Shipping
Add to Wish List
Onboard computer not reading accurate ambient temperatures anymore? This kit includes everything you need to restore external temp monitoring to your BMW.
Rein Blower Motor Resistor - E46, E53, E83
Rein Blower Motor Resistor - E46, E53, E83
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379732
Part#: 64116923204
Back Ordered
$ 94.99 USD
Free Shipping
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$ 94.99 USD
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Used to control the speed of the blower motor
OEM Rein Air Conditioning O-Ring - E36 E38 E39 E46 E52 E53 E60 E61 Z3
OEM Rein Air Conditioning O-Ring - E36 E38 E39 E46 E52 E53 E60 E61 Z3...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:361817
Part#: 64508374959
In Stock
$ 9.17 USD
Free Shipping on orders $49 and up
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$ 9.17 USD
Free Shipping on orders $49 and up
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O-Rings are used to seal various items and without them, you might experience a leak in your vehicle. When doing any sort of work on your air conditioning system, be sure to use new O-Rings to ensure a proper seal.
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A/C O-Ring (10.8mm Diameter)
A/C O-Ring (10.8mm Diameter)
Santech - Corporate Logo
T#:3018037
Part#: 64508375741
In Stock
$ 3.99

This product was last offered at the strikethrough price on
05-07-2026

$ 2.99 USD
Free Shipping on orders $49 and up
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$ 2.99 USD
Free Shipping on orders $49 and up
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O-Rings are used to seal various items and without them, you might experience a leak in your vehicle. When doing any sort of work on your air conditioning system, be sure to use new O-Rings to ensure a proper seal. Getting the correct O-Rings can be a chore, but ECS Tuning has made it easy.
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Air Conditioning Service Valve - R134A
Air Conditioning Service Valve - R134A
Santech - Corporate Logo
T#:16242204
Part#: 64509177579
Ships in 2 Business Days
$ 12.99

This product was last offered at the strikethrough price on
05-08-2026

$ 10.99 USD
Free Shipping on orders $49 and up
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$ 10.99 USD
Free Shipping on orders $49 and up
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Air Conditioning O-Ring Kit
Air Conditioning O-Ring Kit
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:56616383
Part#: 64508374959KT2
Back Ordered
New Item
$ 39.33 USD
Free Shipping on orders $49 and up
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$ 39.33 USD
Free Shipping on orders $49 and up
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Designed for BMW enthusiasts who demand zero leak reliability, this A/C O-Ring Kit delivers precision fit seals crafted from high temperature, chemical resistant elastomers. Whether you're completing routine maintenance or overhauling your climate control setup
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