2017 BMW 640i Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2017 BMW 640i

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Reviewed by
Andrew Hajjar
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 2017 BMW 640i 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 2017 BMW 640i 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.

What are the initial diagnostic steps to take when the cruise control isn't working on a 2017 BMW 640i?

When faced with a malfunctioning cruise control system in your 2017 BMW 640i, it's essential to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse, as a blown fuse is a straightforward issue that can easily disrupt functionality. Next, inspect the cruise control buttons on the steering wheel; if they are unresponsive, this could be the source of the problem. Following this, verify the speed sensor's operation, since it plays a crucial role in relaying speed information to the cruise control system. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues. Additionally, ensure that your brake lights are functioning correctly, as a faulty brake light switch can inhibit cruise control activation. Finally, take a moment to inspect the wiring connections associated with the cruise control system for any signs of damage or looseness. By methodically working through these steps, you can effectively diagnose and potentially resolve the cruise control issue on your BMW.

What are the common problems that could cause the cruise control to stop working in a 2017 BMW 640i?

When troubleshooting the cruise control system in a 2017 BMW 640i, it's essential to consider several common issues that may be at play. A faulty speed sensor is often the culprit, as it plays a critical role in relaying accurate speed information to the cruise control system. If the speed sensor is malfunctioning, the system may fail to engage or maintain the desired speed. Additionally, the brake light switch can cause disruptions; if this switch is not functioning correctly, it can send incorrect signals to the cruise control, preventing it from operating as intended. Another area to inspect is the throttle actuator, which controls the engine's throttle opening. If this component is malfunctioning, it can hinder the cruise control's ability to maintain speed effectively. Electrical problems, such as faulty wiring or blown fuses, can also interfere with the system's functionality, so checking the vehicle's electrical connections is advisable. Lastly, vacuum leaks can impact the cruise control's performance, as they affect the regulation of the engine's throttle. By systematically examining these components, DIY enthusiasts can identify and potentially resolve the issues affecting their cruise control system.

How urgent is it to address the non-functioning cruise control in a 2017 BMW 640i?

When it comes to a non-functioning cruise control in a 2017 BMW 640i, the urgency of addressing the issue cannot be overstated. While it may seem like a minor inconvenience, neglecting this problem can lead to significant safety risks on the road. A malfunctioning cruise control system can result in erratic speed changes, making it difficult to maintain a steady pace, especially during long drives or highway travel. This unpredictability can compromise not only your safety but also that of other road users. Furthermore, the comfort and convenience that cruise control provides are essential for reducing driver fatigue on extended trips. By promptly addressing the malfunction, you can restore this vital feature, enhancing your overall driving experience. Additionally, a faulty cruise control may indicate deeper electronic issues within the vehicle, which, if left unresolved, could lead to more extensive and costly repairs down the line. Lastly, maintaining all vehicle systems, including cruise control, is crucial for preserving resale value. Therefore, it is advisable to take action as soon as you notice any issues with your cruise control to ensure your safety, comfort, and the longevity of your vehicle.

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