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Transmission Heat Exchanger - E39 540i 99-03, E38 740i/iL 99-01

Mfg Part #
17 21 7 505 823
Turner Part #
$332.38 (14% off MSRP)
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Product Details

Part of any cooling system overhaul on the 540i or 740i/iL should include a service for the automatic transmission heat exchanger (cooler). This block takes coolant from the radiator and uses it to cool the oil for the transmission. A blocked or faulty transmission cooler can lead to major transmission faults, harder or hesitating shifts, or even complete transmission failure. We recommend getting 2 new o-rings while replacing the the heat exchanger. il As part of every cooling system service we recommend cleaning or replacing the heat exchanger itself and the replacement of the hoses leading to it (see separate product).

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.​

This item fits the following BMWs:
1999-2003 E39 BMW 540i
1999-2001 E38 BMW 740i 740il
Previous Revisions
  • 17211437771

This Part Fits the Following BMWs

Make Model Submodel Engine
BMW E38 740i M62 4.4L
BMW E38 740iL M62 4.4L
BMW E39 540i M62 4.4L
*The above product applications have been written by Turner Motorsport. All warranties, product application, fitment, and performance are the responsibility of Turner Motorsport. For additional information see the terms of use.
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