Diagnostics showed the following error that triggered a Check Engine Light (CEL) to turn on onto the Board Console (BC); Intake System: P0071: Ambient Air Temperature Sensor Range / Performance followed by dates first detected to the recent date. To check if this is a defective part, push the BC button to scroll to display the outside temperature on the console. If it shows the two extreme temperatures, -40 degrees, or 120 degrees, this will confirm you will need to order this part number.
BMW (65-81-6-936-953)
The part should cost around $50.
I have the 2019 ReX US with the driving wheel on the left.
In order to replace the defective part yourself, turn the wheel all the way to the left to gain access to the panel, and on the passenger side wheel well, unbolt the 3 outside screws and the 1 lower screw to peel back the panel. This panel is located towards the front of the tire. The sensor is located in this area. Replace defective sensor with a click. Sensor will only snap in one way.
To test for proper replacement, go to the temperature setting by scrolling the BC button to display the temperature and verify it is now displaying the correct temperature.
If the CEL is still on and neither BimmerCode nor BimmerLink cannot clear the light, use a scanner like the one I purchased, the Ancel Diagnostic Scan Tool from Amazon,(
https://www.amazon.com/dp/B01G5EA74I?psc=1&ref=ppx_yo2ov_dt_b_product_details) for $20 and you will be able to clear the CEL from the Board Console.
My BMW dealership quoted $115 for the sensor. And about $250 for the one hour labor.
