BMW Coolant & Radiator Hoses for BMW 5 Series E39 (1996-2003)

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We offer replacement hoses from several OE brands that we trust, along with performance silicone upgrades for those who want increased wear resistance compared to factory rubber.
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Transmission Cooler Hose Set - E39 540i 99-03, E38 740i/iL 99-01
Transmission Cooler Hose Set - E39 540i 99-03, E38 740i/iL 99-01 ...
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Packaged by Turner - Corporate Logo
T#:338705
Part#: TMS16592
Ships in 3 Business Days
Sale - Save 5% $ 171.99

This product was last offered at the strikethrough price on
08-13-2026

Starting at $ 163.48 USD
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Sale - Save 5%
$ 171.99

This product was last offered at the strikethrough price on
08-13-2026

Starting at $ 163.48 USD
Free Shipping
Add to Wish List
The oil cooler/heat exchanger for the automatic transmission is one of the most overlooked sections of the 540i and 740i cooling system. The cooler (heat exchanger) is a part of the overall cooling system and uses coolant circulated from the regular cooling system to cool the transmission oil running through this small cooling block. Some of the hoses are shared with the rest of the cooling system as well. The E38/E39 heat exchanger is located along the driver's side frame rail and is accessed from the wheel well. We recommend servicing or cleaning the heat exchanger along with any cooling system overhaul. Or if you're having transmission faults (especially for temperature) you may want to clean the transmission cooler anyway and these hoses will be a nice finishing touch.

Replacing or cleaning the heat exchanger components could lead to better shifting of the automatic as the cooler itself can become clogged. If you're experiencing harder or hesitating shifts, and the internal transmission temperature is rising without being regulated, the components in this system are the likely cause. Staying on top of the cooling needs of the transmission will help prevent a very costly transmission repair in the future. These hoses are easily replaced and you can clean the heat exchanger easily with brake cleaner and some brushes.

Included in this handy package are:
  • 11531711381 - transmission cooling hose from water pump to radiator (with t-connector)
  • 11531711385 - transmission cooling hose from radiator to cooler
  • 11531711384 - transmission cooling hose from cooler to water pump
  • 11537511207 - transmission cooling hose from cooler to chassis
  • hose clamp
  • o-ring


    This hose set fits the following BMWs:
    1999-2003 E39 BMW 540i
    1999-2001 E38 BMW 740i 740il
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    Heater Hard Line replacement Kit
    Heater Hard Line replacement Kit
    10X Entries Into Our F80 M3 Sweepstakes
    Packaged by Turner - Corporate Logo
    T#:15777306
    Part#: 11531705210-KT
    Ships on Nov 12, 2026
    $ 259.99

    This product was last offered at the strikethrough price on
    04-28-2026

    $ 251.99 USD
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    $ 251.99 USD
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    Includes every thing needed to replace heater coolant hard lines, includes gaskets, hoses, and a URO aluminum return line!
    OEM Style Hose Clamps
    OEM Style Hose Clamps
    10X Entries Into Our F80 M3 Sweepstakes
    Turner Motorsport - Corporate Logo
    T#:338927
    Part#: HOSE-CLAMPS
    In Stock
    Sale - Save 3% $ 3.99

    This product was last offered at the strikethrough price on
    06-13-2026

    Starting at $ 3.87 USD
    Free Shipping on orders $49 and up
    Add to Wish List
    Sale - Save 3%
    $ 3.99

    This product was last offered at the strikethrough price on
    06-13-2026

    Starting at $ 3.87 USD
    Free Shipping on orders $49 and up
    Add to Wish List
    Hose clamps for radiator hoses, coolant hoses, vacuum hoses, or intake hoses. These hose clamps are the same style as your OEM hoses with a smooth inside band to prevent cutting into the hose material.
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