BMW 640i XDrive Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your BMW 640i xDrive and How to Fix Them

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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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a BMW 640i xDrive 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 BMW 640i xDrive 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.

Troubleshooting Cruise Control Issues in a BMW 640i xDrive

When troubleshooting cruise control issues in your BMW 640i xDrive, it's essential to adopt a systematic diagnostic approach. Begin by checking the simplest potential problems, such as inspecting the cruise control fuse in the fuse box; a blown fuse is an easy fix that can often resolve the issue. Next, assess the vehicle's battery condition, as a weak battery can impact the cruise control system's functionality. If these initial checks do not yield results, examine the speed sensor for dirt or damage, as a dirty sensor can disrupt the system's operation. Additionally, inspect the wiring connected to the cruise control system for any signs of wear or loose connections, which could lead to intermittent issues. If the problem persists, take a closer look at the throttle control for any obstructions or damage that may hinder its performance. By following this structured approach, you can effectively diagnose and address the common causes of cruise control malfunctions in your BMW 640i xDrive, ensuring a smoother driving experience.

What Could Cause Cruise Control Issues in a BMW 640i xDrive?

When dealing with cruise control issues in a BMW 640i xDrive, it's essential to understand the common problems that may arise. One frequent culprit is the control module, which can malfunction and disrupt the cruise control system's functionality. Additionally, sensors and switches play a critical role; if they are dirty or damaged, they may fail to communicate effectively with the vehicle's electronic systems. Another area to inspect is the throttle actuation, as a faulty actuator can lead to intermittent cruise control performance, particularly if it has a bad solder joint that becomes problematic in high temperatures. DIY enthusiasts should also check for blown fuses in the fuse box, as this is a straightforward fix that can restore functionality. Furthermore, battery issues and wiring problems can contribute to cruise control malfunctions, so ensuring that these components are in good condition is vital. Lastly, if the cruise control light activates but the speed cannot be set, it may indicate that the vehicle is not accurately reading speed, potentially due to issues with the ECM or BUS communication with the electronic throttle. By systematically diagnosing these common problems, DIYers can effectively address and resolve cruise control issues in their BMW 640i xDrive.

Why is the Cruise Control Not Working in a BMW 640i xDrive?

When the cruise control in your BMW 640i xDrive is not functioning, it’s crucial to address the issue promptly, as neglecting it can lead to safety risks and potentially more significant vehicle damage. Common culprits include failed control modules, malfunctioning sensors, or issues with the throttle actuation system. For instance, dirty or faulty speed sensors can disrupt communication with the vehicle's computer, preventing cruise control from operating correctly. Additionally, a blown fuse can completely disable the cruise control system, making it imperative to check the fuse box if you experience this issue. Intermittent problems may also arise from bad solder joints in the cruise control actuator, which can cause the system to fail under certain conditions, such as high engine temperatures. By diagnosing these issues early, you can ensure your vehicle remains safe to drive and avoid costly repairs down the line.

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