2018 BMW 340i Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2018 BMW 340i

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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 2018 BMW 340i 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 340i 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 troubleshoot the non-functional cruise control in a 2018 BMW 340i?

When troubleshooting the non-functional cruise control in a 2018 BMW 340i, start with the simplest solutions before moving on to more complex diagnostics. Begin by checking the cruise control fuse; a blown fuse is a common issue that can easily be resolved. Next, ensure that the cruise control settings are correctly configured on the dashboard and steering wheel controls, as incorrect settings can prevent activation. If these initial checks do not resolve the issue, inspect the speed sensors, as faulty sensors can hinder the cruise control from engaging. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying problems. Additionally, examine the brake and clutch switches to confirm they are functioning properly, as these components are designed to disengage the cruise control when necessary. Finally, if all else fails, test the cruise control module to ensure it is sending and receiving signals correctly. By following this structured approach, you can effectively diagnose and potentially resolve the cruise control issue in your BMW.

What are the common problems that could cause the cruise control to stop working in a 2018 BMW 340i?

When troubleshooting the cruise control system in a 2018 BMW 340i, it's essential to understand the common problems that may lead to its malfunction. One prevalent issue 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, the brake light switch plays a crucial role; if it malfunctions, it can send incorrect signals to the cruise control system, causing it to disengage unexpectedly. Another potential culprit is the throttle actuator, which regulates the engine's throttle opening; if this component fails, the cruise control may struggle to maintain speed. Furthermore, a defective cruise control module can completely disable the system, necessitating a replacement for proper functionality. Lastly, electrical problems such as wiring issues or blown fuses can disrupt the entire cruise control system, leading to its failure. By identifying and addressing these common issues, DIY enthusiasts can effectively diagnose and potentially resolve cruise control problems in their BMW 340i.

How urgent is it to address the non-functioning cruise control in my 2018 BMW 340i?

Addressing the non-functioning cruise control in your 2018 BMW 340i is of utmost urgency due to the safety risks it poses. A malfunctioning cruise control system can lead to erratic speed changes, increasing the likelihood of accidents, especially during long drives or on highways where maintaining a steady speed is crucial. Additionally, the comfort and convenience that cruise control provides during extended periods of driving cannot be overlooked; restoring this feature enhances your overall driving experience. Furthermore, neglecting this issue may indicate deeper electronic problems within your vehicle, which could escalate into more significant and costly repairs if not addressed promptly. Therefore, prioritizing the repair of your cruise control system is essential for ensuring both your safety and the longevity of your vehicle.

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2018 BMW 340i Cruise Control Issues & Repairs | RepairPal