BMW 745Li Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your BMW 745Li and How to Fix Them

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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 BMW 745Li 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 745Li 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.

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.

Troubleshooting Cruise Control Issues in a BMW 745Li

When troubleshooting cruise control issues in your BMW 745Li, start with the simplest solutions to save time and effort. Begin by checking the fuse associated with the cruise control system; a blown fuse is a common and easily fixable problem. If the fuse is intact, inspect the cruise control module and related components such as sensors and actuators for any signs of malfunction. Electrical issues, including corroded connections or bad solder joints, can also disrupt the system, so ensure all wiring is in good condition. Additionally, examine the brake system, as a faulty brake light or switch can prevent cruise control from engaging. Finally, if the check engine light is illuminated or if there are engine-related issues, these should be addressed, as they can directly impact cruise control functionality. If these steps do not resolve the issue, it may be time to consult a professional mechanic for a thorough diagnosis and repair.

What Are the Common Problems with Cruise Control in a BMW 745Li?

When dealing with cruise control problems in a BMW 745Li, it's essential to understand the various common issues that may arise. One frequent culprit is a failed control module, which can disrupt the entire system's functionality. Additionally, problems with sensors or switches can lead to malfunctions, making it crucial to inspect these components. Owners should also be aware that a blown fuse or battery issues can prevent the cruise control from operating correctly. Another common issue is a dirty speed sensor, which can affect the system's ability to maintain speed. Wiring problems and a damaged throttle control are also significant factors that can contribute to cruise control failures. For those looking to troubleshoot these issues, a thorough diagnostic approach is recommended, including checking fuses, inspecting the battery, and cleaning or replacing any dirty or damaged components. While some may feel confident in addressing these problems themselves, consulting a professional mechanic or visiting a BMW service center is advisable for more complex issues to ensure a proper resolution.

Why is the Cruise Control Not Working in a BMW 745Li?

When the cruise control in your BMW 745Li is not functioning, it is crucial to address the issue without delay. A malfunctioning cruise control system can stem from various factors, including failed control modules, faulty sensors, or issues with the steering column switch cluster. These components are integral to the system's operation, and neglecting to diagnose and repair them can lead to more significant problems down the line. For instance, dirty or malfunctioning speed sensors can disrupt the communication between your vehicle's computer and the necessary components, potentially compromising your driving safety. Moreover, using cruise control when it is not working correctly can pose serious risks, as it may lead to unexpected acceleration or deceleration. Therefore, it is essential to take a systematic approach to troubleshooting, starting with the most likely causes, to ensure that your cruise control system operates safely and effectively. Addressing these issues promptly not only enhances your driving experience but also protects the integrity of your vehicle.

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