Auto Transmission Radiator Oil Cooler Thermostat, Behr - E53 X5

This part is listed by BMW as BMW part number 17107559966 (17-10-7-559-966) and is described as the Automatic Transmission Oil Cooler Thermostat, which is mounted to the radiator on the first generation BMW X5 with any of the V8 engine variants, including X5 4.4i, X5 4.6is, and X5 4.8is for the 2001, 2002, 2003, 2004, 2004 and 2006 model years.

This thermostat controls the flow of transmission oil through the transmission oil cooler. A faulty oil cooler thermostat can lead to transmission overheating (if it's stuck closed) or a slow-to-warm transmission (if it's stuck open). Either scenario will trigger transmission / engine fault codes and require immediate attention.

Fortunately we have this very affordable OEM replacement part, which is substantially less expensive than the original dealer thermostat unit costs, but still has exception fit / finish / functionality, making it up to task for a long and trouble-free operation. This oil cooler thermostat is made by Mahle/Behr/Hella, a well known original equipment manufacturer (OE/OEM) for BMW. If you're looking for the best solution at the best price, this is the brand we recommend.

This thermostat also includes a full 2 year / 24 month warranty, just like the dealer equivalent.

For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.

BMW Fitments:

X5 Series
E53 X5 (00-06) > X5 4.4i M62 4.4L (99-03)
E53 X5 (00-06) > X5 4.4i N62
E53 X5 (00-06) > X5 4.6is M62
E53 X5 (00-06) > X5 4.8is N62