2018 BMW 650i XDrive Gran Coupe Cruise Control Isn't Working

Fixing Cruise Control Malfunctions in 2018 BMW 650i xDrive Gran Coupe

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Reviewed by
Bo Fader
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 2018 BMW 650i 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 2018 BMW 650i 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.

What steps should I take to diagnose the cruise control issue in my 2018 BMW 650i xDrive Gran Coupe?

To diagnose the cruise control issue in your 2018 BMW 650i xDrive Gran Coupe, begin with the simplest checks to avoid unnecessary complications. Start by inspecting the cruise control fuse; a blown fuse can easily disrupt the system's functionality. Next, examine the cruise control buttons on your steering wheel to ensure they are responsive and not stuck, as faulty buttons can lead to operational failures. If these initial checks do not reveal the problem, utilize an OBD-II scanner to identify any error codes that may indicate specific issues within the cruise control system. Following this, assess the speed sensors, as they are vital for the cruise control's performance; any malfunction here can directly affect its operation. Additionally, inspect the wiring connections for signs of damage or corrosion, as poor connections can hinder the system's effectiveness. If all else fails, test the cruise control module to confirm it is functioning correctly. Should you still be unable to resolve the issue, seeking assistance from a professional mechanic or an authorized BMW service center is recommended for a comprehensive diagnosis and repair. By following this structured approach, you can systematically identify and address the cruise control problem in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2018 BMW 650i xDrive Gran Coupe?

When troubleshooting the cruise control system in a 2018 BMW 650i xDrive Gran Coupe, it's essential to understand the common problems that may lead to its malfunction. One of the primary culprits is a faulty speed sensor, which can hinder the system's ability to accurately gauge the vehicle's speed, preventing it from engaging or maintaining the desired speed. Additionally, a malfunctioning brake light switch can disrupt the cruise control's operation, as it is designed to deactivate the system when the brakes are applied. Another potential issue is with the throttle actuator; if it fails to adjust the throttle position correctly, the cruise control may exhibit erratic behavior or fail to maintain speed altogether. Electrical problems, such as blown fuses or wiring issues, can also impede the cruise control's functionality, as can vacuum leaks in the engine, which affect the system's reliance on vacuum pressure. By identifying and addressing these common issues, DIY enthusiasts can effectively restore the cruise control functionality in their BMW.

How urgent is it to address the malfunctioning cruise control in a 2018 BMW 650i xDrive Gran Coupe?

Addressing a malfunctioning cruise control system in your 2018 BMW 650i xDrive Gran Coupe is of utmost importance due to the immediate safety risks it poses. A malfunction can lead to unexpected acceleration or deceleration, which can create hazardous driving conditions for you and others on the road. Additionally, a faulty cruise control system detracts from the overall driving experience, making long journeys less comfortable and convenient. Ignoring these symptoms not only compromises your safety but can also lead to further damage within the vehicle's systems, resulting in more extensive and expensive repairs down the line. Therefore, it is crucial to prioritize the diagnosis and repair of any cruise control issues to ensure your vehicle operates safely and efficiently.

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