BMW 335is Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your BMW 335is 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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a BMW 335is 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 335is 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.

A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.

Troubleshooting Cruise Control Issues in a BMW 335is

When troubleshooting cruise control issues in your BMW 335is, start with a methodical diagnostic approach to identify the root cause of the malfunction. Begin by checking the vehicle's fuse box for a blown cruise control fuse, as this is a common and easily fixable issue. Next, assess the condition of your battery, since a weak battery can disrupt the cruise control system's functionality. If these initial checks do not resolve the problem, inspect the speed sensor for dirt or damage, as a dirty sensor can hinder performance. Additionally, examine the wiring for any signs of wear or damage, as faulty wiring can lead to significant issues. Don’t overlook the throttle control mechanism; cleaning or repairing it may restore proper operation. Lastly, ensure that your brake system is functioning correctly, as any faults here can directly impact cruise control. If you have addressed these areas and the problem persists, it may be time to consider engine-related issues or consult a professional for further assistance. This step-by-step approach not only simplifies the troubleshooting process but also empowers you to tackle the problem effectively.

What Could Cause the Cruise Control to Malfunction in a BMW 335is?

When diagnosing cruise control malfunctions in a BMW 335is, it's essential to understand the common problems that may arise. A failed control module, sensor, or switch is often at the heart of the issue, as these components are crucial for the system's operation. Additionally, throttle actuation problems, particularly those stemming from a faulty throttle position sensor, can lead to erratic engine behavior, such as excessive fuel consumption and black exhaust emissions. Dirty or malfunctioning speed sensors can further complicate matters by disrupting the communication between the vehicle's computer and the cruise control system, leading to inconsistent performance. While it may seem manageable to keep the cruise control off, using a malfunctioning system can pose safety risks. Therefore, if you encounter these issues, it may be wise to consult a professional for a thorough diagnosis and repair to ensure your vehicle operates safely and efficiently.

Why is the Cruise Control Not Working in a BMW 335is?

When the cruise control in your BMW 335is fails, it’s crucial to address the issue promptly, as neglecting it can lead to safety risks and further complications. Common culprits behind cruise control malfunctions include faulty control modules, dirty or failed sensors, and issues with the throttle actuation system. These components are essential for the cruise control to function correctly, and if they are compromised, it can result in unpredictable vehicle behavior, especially if the system engages unexpectedly. Additionally, problems such as a blown fuse or a defective brake pedal switch can exacerbate the situation, potentially leading to dangerous driving conditions. While it may seem minor if you rarely use cruise control, the implications of a malfunction can be significant, particularly if it occurs while driving at high speeds. Therefore, if you notice any signs of malfunction, it’s advisable to investigate the issue further or consult a professional to ensure your vehicle remains safe and reliable on the road.

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