2018 BMW I3s Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2018 BMW i3s and How to Fix Them

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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 i3s 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 i3s 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 i3s?

When troubleshooting the non-functional cruise control in a 2018 BMW i3s, it's essential to adopt a systematic diagnostic approach. Start by checking the cruise control settings in the vehicle's menu to ensure they are correctly configured and activated. Next, inspect the cruise control buttons on the steering wheel for any signs of malfunction, as faulty buttons can often be the culprit. Following this, verify the operation of the speed sensors, which are crucial for the cruise control system's functionality. If these initial checks do not reveal the issue, utilize a diagnostic tool to scan for any fault codes that may indicate specific problems within the system. Additionally, inspect the wiring and connections associated with the cruise control for any damage or corrosion, as these can disrupt the system's operation. If all else fails, testing the cruise control module itself may be necessary to confirm its functionality. By following this structured approach, you can effectively diagnose and potentially resolve the cruise control issues in your BMW i3s.

What are the common problems that could cause the cruise control to stop working in a 2018 BMW i3s?

When troubleshooting the cruise control system in a 2018 BMW i3s, it's essential to understand the common problems that could lead to its failure. One of the primary culprits is a faulty speed sensor, which is crucial for the system to accurately gauge the vehicle's speed. If this sensor malfunctions, the cruise control may not engage or maintain the desired speed. Additionally, issues with the brake light switch can disrupt the system, as it is designed to deactivate when the brake pedal is pressed; a defective switch may prevent the cruise control from functioning correctly. Another potential issue is a malfunctioning throttle actuator, which is responsible for controlling the engine's throttle opening and can hinder the system's ability to maintain speed. Electrical problems, such as blown fuses or wiring issues, can also impede the cruise control's operation, as can software glitches within the vehicle's onboard computer. Lastly, vacuum leaks in the engine can disrupt the necessary signals for the cruise control to operate effectively. By identifying and addressing these common issues, you can effectively diagnose and repair the cruise control system in your BMW i3s.

How urgent is it to address the malfunctioning cruise control in a 2018 BMW i3s?

Addressing a malfunctioning cruise control in a 2018 BMW i3s 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 both the driver and others on the road. Additionally, a properly functioning cruise control system enhances the overall driving experience, providing convenience and comfort during long trips. Neglecting to fix this issue not only compromises safety but can also lead to further complications within the vehicle's systems, potentially resulting in more extensive and expensive repairs down the line. Therefore, it is crucial to prioritize the repair of cruise control issues to ensure safe and enjoyable driving.

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