2020 BMW M8 Gran Coupe Cruise Control Isn't Working

Diagnosing Cruise Control Issues in Your 2020 BMW M8 Gran Coupe and How to Restore Functionality

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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 M8 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 M8 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 diagnostic steps to troubleshoot the non-functioning cruise control in a 2020 BMW M8 Gran Coupe?

When troubleshooting the non-functioning cruise control in a 2020 BMW M8 Gran Coupe, it's essential to adopt a systematic diagnostic approach. Start by checking the cruise control settings in the vehicle's menu to ensure they are correctly configured and activated. Next, inspect the cruise control buttons on the steering wheel for any signs of damage or malfunction, as these can directly affect functionality. It's also crucial to verify that the speed sensors are operational, as they provide the necessary data for the cruise control system to function correctly. Utilizing a diagnostic scanner can help identify any error codes stored in the vehicle's computer, which may point to specific issues within the cruise control system. Additionally, check the fuse associated with the cruise control; a blown fuse can easily disrupt its operation. Testing the cruise control module for power and signal transmission is another vital step, along with inspecting the wiring for any damage or loose connections. Finally, consulting the owner's manual can provide tailored troubleshooting guidance specific to your vehicle. By following this structured approach, you can effectively diagnose and address the issues affecting the cruise control system in your BMW M8 Gran Coupe.

What are the common problems that could cause the cruise control to malfunction in a 2020 BMW M8 Gran Coupe?

When dealing with cruise control malfunctions in a 2020 BMW M8 Gran Coupe, it's essential to understand the various common problems that may arise. One of the primary culprits is sensor issues, where the sensors responsible for detecting speed and distance may fail, leading to erratic behavior or complete system failure. Additionally, electrical faults, such as damaged wiring or loose connectors, can disrupt the system's operation, making it crucial to inspect these components for any signs of wear or damage. Software glitches are another potential issue; ensuring that the vehicle's software is up to date can help mitigate these problems. Mechanical problems, including a faulty actuator or vacuum leaks, can also hinder the cruise control's performance, so a thorough inspection of these parts is advisable. Lastly, don't overlook the brake light switch, as a malfunction here can prevent the cruise control from engaging or disengaging properly. By being aware of these common issues, DIY enthusiasts can take proactive steps to troubleshoot and maintain the cruise control system effectively.

How urgent is it to address the malfunctioning cruise control in a 2020 BMW M8 Gran Coupe?

When it comes to the malfunctioning cruise control in a 2020 BMW M8 Gran Coupe, the urgency of addressing the issue cannot be overstated. A malfunctioning system can lead to unexpected acceleration or deceleration, creating a significant safety hazard on the road. For DIY enthusiasts, understanding the implications of neglecting these symptoms is crucial; not only can it compromise your safety, but it can also detract from the overall driving experience that this luxury vehicle is designed to provide. Moreover, ignoring cruise control problems may result in more extensive damage to the vehicle's systems, leading to costly repairs down the line. By promptly diagnosing and addressing the malfunction, you can prevent further complications and ensure that your cruise control system operates smoothly, allowing you to enjoy the full capabilities of your BMW M8 Gran Coupe while maintaining safety and performance.

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