2007 Mazda RX-8 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2007 Mazda RX-8

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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 2007 Mazda RX-8 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 2007 Mazda RX-8 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.

When the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.

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.

What are the steps to diagnose the non-functioning cruise control in a 2007 Mazda RX-8?

To effectively diagnose the non-functioning cruise control in your 2007 Mazda RX-8, start with a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Begin by inspecting the cruise control fuse in the fuse box; a blown fuse is an easy fix that can often resolve the issue. Next, examine the cruise control switch located on the steering wheel to ensure it is operational, as a faulty switch can prevent the system from engaging. Following this, check the vehicle's speed sensors, as they are crucial for the cruise control to function properly; any malfunction here can hinder performance. Additionally, assess the brake pedal switch, which is essential for disengaging the cruise control when brakes are applied. A malfunctioning switch can lead to the cruise control not activating. Don’t forget to inspect the throttle cable for any signs of wear or damage, as this can also impact the system's functionality. If these initial checks do not reveal the problem, using an OBD-II scanner to scan for error codes can provide further insights into any underlying issues. If you still cannot identify the problem, consulting a mechanic with experience in Mazda vehicles is advisable for a more thorough diagnosis and repair. By following this structured approach, you can efficiently troubleshoot and potentially resolve the cruise control issue in your RX-8.

What are the common problems that could cause the cruise control to stop working in a 2007 Mazda RX-8?

When troubleshooting the cruise control system in a 2007 Mazda RX-8, it's essential to understand the common problems that may lead to its failure. One of the primary culprits could be a faulty cruise control switch, which may prevent the system from engaging or disengaging as intended. Additionally, a blown fuse within the cruise control circuit can disrupt functionality, making it crucial to check and replace any damaged fuses. Another significant factor is the speed sensor; if it malfunctions, the cruise control may struggle to maintain a consistent speed. Vacuum leaks can also pose a problem, as they disrupt the necessary vacuum pressure for the system to operate effectively. Furthermore, issues with the brake light switch can inhibit the cruise control from engaging, as this switch serves as a safety feature. Lastly, a malfunctioning throttle cable, whether due to fraying or stretching, can hinder the cruise control's ability to maintain speed. By systematically addressing these potential issues, you can effectively diagnose and resolve the cruise control problems in your Mazda RX-8.

How urgent is it to address the non-functioning cruise control in a 2007 Mazda RX-8?

When it comes to the non-functioning cruise control in your 2007 Mazda RX-8, understanding the urgency of the situation is crucial. While this feature may not directly compromise your vehicle's safety or drivability, ignoring the problem can lead to a diminished driving experience and may mask underlying issues that could escalate into more significant repairs. The convenience of cruise control, especially during long drives, cannot be overstated, as it allows for a more relaxed driving experience. By addressing the malfunction promptly, you not only restore this valuable feature but also mitigate the risk of further complications that could arise from neglect. Therefore, it is wise to consult a qualified mechanic to diagnose the issue and implement necessary repairs, ensuring that your Mazda RX-8 remains in optimal condition for all your driving needs.

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