2000 BMW M5 Cruise Control Isn't Working

Diagnosing Common Issues with the Cruise Control System in Your 2000 BMW M5 and How to Fix Them

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Reviewed by
Aisha
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 2000 BMW M5 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 2000 BMW M5 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.

When the throttle position sensor fails, the engine's computer tends to overcompensate with fuel, leading black exhaust coming from the tailpipe. There is a strong possibility of engine misfires, and the check engine light will come on.

Throttle position sensors can also develop "dead spots," or certain places along the throttle curve where it doesn't get a reading. When this happens, the above symptoms can occur but then stop when you further press or let off the gas pedal.

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 2000 BMW M5?

To effectively troubleshoot the non-functioning cruise control in your 2000 BMW M5, begin by connecting a code reader to your vehicle. This will allow you to check the functionality of the on-off switch and the set/resume switch, which are crucial for cruise control operation. Next, verify the brake and clutch switches, as these components play a significant role in the cruise control system's functionality. Inspect the cruise control switch and its associated buttons, ensuring they respond correctly when pressed. Additionally, check the ABS and speed sensors, as any malfunction here can impact cruise control performance. If you encounter any diagnostic trouble codes, particularly those related to the cruise control cancel circuit, take note of them for further investigation. Look for specific fault messages, such as "ACC is unavailable," and address these systematically. It’s also wise to examine the wiring, especially the clock spring, to confirm that all connections from the steering wheel controls to the cruise control system are intact. Lastly, consider checking for vacuum leaks and resoldering components within the cruise control unit if necessary. By following this structured approach, you can identify the root cause of the issue and take the appropriate steps to restore functionality to your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2000 BMW M5?

When dealing with cruise control issues in a 2000 BMW M5, it's essential to understand the common problems that may arise. One frequent culprit is the malfunction of specific components within the cruise control system, which can prevent it from functioning correctly. Additionally, if the adaptive cruise control has been disabled through the Insite system, it may need to be reactivated to restore normal operation, although some error messages might still persist. Another significant factor to consider is the alignment of the adaptive cruise control sensor; misalignment can trigger warnings such as "ACC is unavailable" or "Adaptive cruise control sensor misadjusted," indicating that the sensor needs adjustment or recalibration. Furthermore, physical interference, such as debris obstructing the car emblem, can temporarily disrupt the system's functionality. Regular maintenance and careful inspection of these elements are crucial for ensuring that the cruise control system operates smoothly, allowing DIY enthusiasts to effectively diagnose and address any issues that may arise.

How urgent is it to address the non-functioning cruise control in a 2000 BMW M5?

When dealing with a non-functioning cruise control system in a 2000 BMW M5, it's essential to assess the urgency of the situation. While the failure of cruise control may not seem immediately critical, it can signal underlying problems that could compromise your vehicle's performance and safety. If you notice additional warning signs, such as the Check Engine Light illuminating, this could indicate a more serious issue that warrants prompt attention. Ignoring these symptoms may lead to further complications, potentially resulting in safety hazards while driving. Moreover, the inconvenience of a malfunctioning cruise control can detract from the comfort of long journeys, where this feature is particularly beneficial. Therefore, it is advisable to have the cruise control system inspected by a qualified mechanic to diagnose the root cause of the malfunction. Addressing these issues in a timely manner not only enhances your driving experience but also ensures the overall safety and functionality of your BMW M5.

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