2020 BMW M850i XDrive Gran Coupe Cruise Control Isn't Working

Cruise Control Issues in 2020 BMW M850i xDrive Gran Coupe

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2020 BMW M850i xDrive Gran Coupe cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
  • Control Module: A faulty control module can lead to erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
  • Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent throttle response.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2020 BMW M850i xDrive Gran Coupe cruise control isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

What are the initial steps to diagnose the cruise control issue in a 2020 BMW M850i xDrive Gran Coupe?

To effectively diagnose cruise control issues in a 2020 BMW M850i xDrive Gran Coupe, start by ensuring that the cruise control settings are properly configured. This includes confirming that the system is activated and set to the desired speed. Next, inspect the cruise control buttons on the steering wheel for any signs of malfunction, as faulty buttons can often lead to operational problems. Utilizing a diagnostic scanner is also crucial; it allows you to check for any error codes that may indicate specific issues within the cruise control system. Additionally, don’t overlook the importance of checking the cruise control fuse, as a blown fuse can disrupt functionality. Finally, take the vehicle for a test drive to observe whether the cruise control engages and maintains speed as expected, noting any irregularities. By following this structured approach, you can systematically identify and address the root cause of the cruise control issue.

What are the common problems that could cause the cruise control to stop working in a 2020 BMW M850i xDrive Gran Coupe?

When the cruise control in your 2020 BMW M850i xDrive Gran Coupe ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue effectively. One of the primary culprits is a faulty speed sensor, which is crucial for the cruise control system to accurately gauge your vehicle's speed. If this sensor malfunctions, the system may fail to engage or maintain the desired speed. Additionally, issues with the brake light switch can disrupt the cruise control's operation, as it relies on signals from the brake system to function properly. Another potential problem could stem from the throttle control; a faulty throttle position sensor or actuator can hinder the cruise control's ability to maintain speed. Electrical problems, such as blown fuses or wiring issues, can also lead to a malfunctioning cruise control system. Lastly, software glitches within the vehicle's onboard computer may require a reset or update to restore functionality. By identifying these common issues, you can take the necessary steps to troubleshoot and potentially repair your cruise control system, ensuring a smoother driving experience.

How urgent is it to address the malfunctioning cruise control in a 2020 BMW M850i xDrive Gran Coupe?

When it comes to the malfunctioning cruise control in a 2020 BMW M850i xDrive Gran Coupe, the urgency of addressing the issue cannot be overstated. A malfunctioning cruise control system can lead to unexpected acceleration or deceleration, creating a significant safety risk for both the driver and other road users. This is particularly concerning during long drives or highway travel, where reliance on cruise control is common for maintaining speed and comfort. Additionally, neglecting these symptoms may not only compromise your driving experience but could also lead to further damage to the vehicle's systems, resulting in more extensive and costly repairs down the line. Therefore, it is essential to promptly diagnose and resolve any cruise control issues to ensure the vehicle operates safely and efficiently, preserving both its performance and your peace of mind on the road.

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2020 BMW M850i xDrive Gran Coupe Cruise Control Issues