BMW 550i GT Cruise Control Isn't Working

Troubleshooting Common Issues with the Cruise Control System in Your BMW 550i GT 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
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a BMW 550i GT 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 550i GT 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 550i GT

When troubleshooting cruise control issues in your BMW 550i GT, it's essential to follow a structured diagnostic approach that prioritizes simpler solutions before delving into more complex problems. Begin by inspecting the fuse box for a blown cruise control fuse, as this is a straightforward fix that can often resolve the issue. If the fuse is intact, check the battery's condition, since a weak battery can hinder the cruise control's performance. Next, focus on the speed sensor; a dirty sensor can lead to malfunctions, so cleaning it may restore proper function. Additionally, examine the wiring for any signs of wear or disconnection that could disrupt the system. Lastly, inspect the throttle control for dirt or damage, as these factors can also impede cruise control operation. By systematically addressing these potential issues, you can effectively troubleshoot and resolve cruise control problems in your BMW 550i GT, enhancing your driving experience.

What Are the Common Problems Causing Cruise Control Issues in a BMW 550i GT?

When diagnosing cruise control issues in a BMW 550i GT, it's essential to understand the common problems that may arise. One frequent culprit is a failed control module, sensor, or switch, which can disrupt the system's functionality. Additionally, throttle actuation problems can prevent the cruise control from engaging properly, leading to frustrating driving experiences. Another significant issue is the failure of the throttle position sensor, which can cause the engine computer to overcompensate with fuel, resulting in black exhaust from the tailpipe. While some of these problems may seem daunting, DIY enthusiasts can start by checking for simple fixes, such as inspecting the fuse box for blown fuses. However, for more complex issues, such as sensor or module failures, it is advisable to seek professional assistance from a BMW dealership to ensure accurate diagnosis and repair. Understanding these common problems can empower you to take the first steps in troubleshooting your cruise control system effectively.

Why is it Urgent to Fix the Cruise Control in a BMW 550i GT?

Addressing cruise control issues in a BMW 550i GT is not just a matter of convenience; it is a critical safety concern that should not be overlooked. A malfunctioning cruise control system can lead to dangerous driving conditions, as unexpected changes in speed can result in loss of vehicle control and potential accidents. Simple fixes, such as replacing a blown fuse, can often be handled by DIY enthusiasts, but more complex problems may require professional intervention to avoid further complications. For instance, if components like the control module or throttle actuation system fail, it can lead to serious performance issues, including excessive fuel consumption and harmful emissions. Additionally, intermittent problems, such as a faulty actuator, can create unpredictable driving experiences, making it essential to diagnose and resolve these issues promptly. Neglecting cruise control malfunctions not only compromises the vehicle's functionality but also poses significant safety risks, making it urgent for BMW 550i GT owners to address these concerns as soon as they arise.

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