2018 BMW M4 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2018 BMW M4 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 2018 BMW M4 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 M4 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 M4?

When diagnosing the cruise control issue in your 2018 BMW M4, it's essential to adopt a systematic approach that begins with the simplest solutions before progressing to more complex diagnostics. Start by checking the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational, since faulty buttons can lead to malfunctions. Utilizing a diagnostic scanner to check for error codes in the vehicle's computer system can provide critical insights into the underlying problem. Additionally, verify that the speed sensors are functioning correctly, as they are integral to the cruise control's operation. Don't overlook the importance of examining the wiring connections associated with the cruise control system; loose or damaged wires can cause significant issues. If these steps do not resolve the problem, it may be time to consult a professional mechanic or an authorized BMW service center for a comprehensive diagnosis and repair. By following this structured diagnostic approach, you can effectively identify and address the cruise control issue in your BMW M4.

What are the common problems that could cause the cruise control to stop working in a 2018 BMW M4?

When troubleshooting the cruise control system in a 2018 BMW M4, it's essential to consider several common issues that may be at play. One of the first components to check is the cruise control switch, as a malfunction here can prevent the system from engaging or disengaging correctly. Additionally, the speed sensor plays a crucial role; if it is faulty, it may provide inaccurate speed readings, leading to cruise control failure. Another critical element is the brake light switch, which must function properly since the cruise control is designed to disengage when the brakes are applied. If this switch is malfunctioning, it could be the reason your cruise control isn't activating. Furthermore, inspect the throttle actuator, as any problems with this component can hinder the system's ability to maintain a steady speed. Lastly, don't overlook potential electrical faults, such as blown fuses or wiring issues, which can disrupt the entire cruise control system. By systematically checking these components, you can identify the root cause of the problem and determine whether a DIY fix is feasible or if professional assistance is needed.

How urgent is it to address the non-functioning cruise control in my 2018 BMW M4?

When your 2018 BMW M4's cruise control stops working, it’s crucial to recognize the urgency of the situation. A malfunctioning cruise control not only diminishes the convenience of maintaining a steady speed during long drives but may also signal deeper issues within your vehicle's electronic systems or sensors. Ignoring this problem could lead to more significant complications, potentially affecting other critical systems in your car. Moreover, a faulty cruise control can pose safety risks, especially on extended trips where you rely on this feature to reduce fatigue and enhance fuel efficiency. For DIY enthusiasts, while it may be tempting to delay repairs, addressing the issue promptly is essential to prevent further damage and ensure your vehicle operates safely. Therefore, if you notice any irregularities with your cruise control, it’s advisable to conduct a thorough inspection or consult a qualified mechanic to maintain the performance and safety of your BMW M4.

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