Acura MDX Blind Spot Not Working: What to Do?

Acura MDX Blind Spot Not Working: What to Do?

Navigating the roads in your Acura MDX should be a seamless experience, thanks to its advanced safety features. 

However, when the Blind Spot Information System encounters issues, it can lead to moments of uncertainty and concern. 

If you’re facing the perplexing situation of a non-functional blind spot monitor in your Acura MDX, you’re not alone. 

This article is crafted to guide you through the troubleshooting process, ensuring you regain that extra layer of security and peace of mind. 

Stay tuned as we delve into the common causes and the most effective solutions to restore your vehicle’s vigilant companion.

Why Did My Blind Spot Monitor Stop Working?

The failure of a Blind Spot Monitor (BSM) in an Acura MDX can be attributed to several factors, each disrupting the system’s ability to alert you to vehicles in your blind spot.

  • Sensor Blockage or Damage

The BSM relies on sensors typically located on the rear bumper or side mirrors. Dirt, debris, or snow can obstruct the sensors, while accidents or wear and tear can damage them, leading to malfunctions.

  • Electrical Issues

Faulty wiring or a drained battery can prevent the BSM from receiving the power it needs to operate correctly.

  • Software Glitches

Like any computerized system, the BSM software can experience glitches. These can often be resolved with a system reset or an update at a dealership.

  • Misalignment

If the sensors become misaligned, perhaps due to a minor collision or driving over a pothole, they may fail to detect vehicles correctly.

  • Aftermarket Accessories

Sometimes, aftermarket accessories like window tints or additional lights can interfere with sensor operation.

  • Wear and Tear

Over time, the sensors can suffer from general wear and tear, which can degrade their performance.

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How Do You Turn On The Blind Spot Monitor On An Acura Mdx?

Turning on the Blind Spot Monitor (BSM) on an Acura MDX is a straightforward process. Here’s how you can activate it:

Start the Vehicle: Ensure your Acura MDX is started and the transmission is in Drive (D) or Sport (S).

Press the Safety Support Switch: This switch is usually located on the vehicle’s dashboard.

Select the BSM Symbol: Use the right selector wheel on the steering wheel to scroll to the BSM symbol.

Activate the System: Push the selector wheel to activate the BSM. You’ll know it’s on when the symbol illuminates green and a checkmark appears.

Acura MDX Blind Spot Not Working: What to Do?

What Is The Blind Spot Warning On The Acura MDX?

The Blind Spot Warning, or Blind Spot Information System (BSI), on the Acura MDX, is a safety feature designed to alert drivers to vehicles in their blind spot areas. Here’s a detailed breakdown of how it works and its components:

  • Functionality

The BSI system uses radar sensors located under the rear bumper corners to detect vehicles in specified alert zones adjacent to your vehicle. These zones are the areas that are not easily visible using the side mirrors, commonly referred to as “blind spots.”

  • Alert Zones

The system has a range that extends approximately 10 feet (3 meters) from the rear bumper and about 1.6 feet (0.5 meters) to the sides. When a vehicle enters these zones, particularly when it approaches from behind to overtake, the system is triggered.

  • Indicators

The Acura MDX features BSI alert indicators located near the pillar on both sides of the vehicle. These indicators light up to inform the driver that a vehicle is in the blind spot area.

  • Alerts

The indicator lights up when a vehicle enters the alert zone from behind with a speed difference of no more than 31 mph (50 km/h) relative to your vehicle.

The indicator blinks and a beeper sounds when you engage the turn signal in the direction of the detected vehicle, signaling an intention to change lanes.

  • Safety Reminder

While the BSI provides valuable assistance, it’s important to remember that it has limitations. Drivers should not rely solely on the BSI when changing lanes. Always look in your mirrors, to either side of your vehicle, and behind you for other vehicles before changing lanes.

What Is The Problem Of Acura Mdx?

The Acura MDX, while known for its luxury and reliability, has had its share of problems over the years. Here’s a comprehensive look at the common issues:

  • Transmission Problems

Some MDX models have experienced transmission shifting issues, such as rough shifting, hesitations, and in severe cases, complete transmission failure.

  • Engine Concerns

Excessive oil consumption has been noted, particularly in the 2010 to 2013 models, which may require more frequent oil changes than expected. Additionally, engine misfires and failures have been reported, affecting the vehicle’s performance and reliability.

  • Electrical System Failures

Various electrical issues have plagued all generations of the MDX, including problems with the battery, alternator, and other components that can lead to a loss of power or unexpected shutdowns.

  • Brake Wear

Prematurely wearing brake pads, warped rotors, and a loss of braking power have been concerns, necessitating more frequent maintenance.

How Do I Reset My Side Detection System?

Resetting the Side Detection System in your Acura MDX can typically be done through a few simple steps. This is how to reset the system:

Start Your Vehicle: Ensure your Acura MDX is turned on.

Locate the Side Detection System Interface: This is usually found in the vehicle settings menu on the infotainment system.

Navigate to the Settings: Use the infotainment controls to navigate to the driver assistance settings where the Side Detection System options are located.

Reset the System: Look for an option to reset the system to its default settings. This might be labeled as ‘Reset’, ‘Restore Defaults’, or something similar.

Confirm the Reset: Follow the prompts to confirm that you want to reset the system. The vehicle may require you to hold down a button or select several menu options to confirm.

How Do You Fix Blind Spots?

Fixing blind spots in your Acura MDX involves a series of checks and steps to ensure the Blind Spot Information System (BSI) is functioning correctly. Here’s a detailed guide:

Sensor Check: Begin by inspecting the BSI sensors located on the rear bumper corners for any obstructions like mud, snow, or debris. Clean them gently with a soft cloth.

Electrical Connections: Ensure that the electrical connections to the sensors are secure and not damaged. Loose or corroded connections can disrupt the system’s functionality.

System Reset: Sometimes, simply resetting the BSI system can resolve temporary glitches. You can do this through the vehicle settings menu on the infotainment system. Navigate to the ‘Driver Assist System Setup,’ select ‘Blind Spot Info,’ and then choose to turn the system off and on again.

Calibration: If the sensors are misaligned, perhaps due to a minor collision or driving over a pothole, they may require recalibration. This process is best handled by a professional at an Acura service center.

Software Update: Check if there are any software updates available for the BSI system. An outdated system may not function optimally, and an update can be performed at a dealership.

Professional Diagnostic: If the above steps don’t resolve the issue, it’s advisable to have a professional diagnostic conducted. A certified mechanic can use specialized tools to read error codes and perform a thorough check.

Component Replacement: In cases where a sensor or other part of the BSI system is faulty, replacement of the specific component may be necessary.

How Do You Test A Blind Spot Sensor?

Testing the Blind Spot Sensor on an Acura MDX involves a few steps to ensure it’s functioning correctly. Here’s a detailed explanation:

Visual Inspection: Start with a visual check of the sensors located on the rear bumper corners. Make sure there’s no damage or obstructions that could affect performance.

Clean the Sensors: If there’s dirt, debris, or residue on the sensors, clean them gently with a soft cloth and appropriate cleaning solution.

Check for Error Messages: Look at the vehicle’s dashboard for any warning lights or messages related to the Blind Spot Information System (BSI).

Engage the System: Turn on the BSI using the vehicle’s settings. The system should be active when the vehicle is in Drive (D) or Sport (S) mode and traveling between 20 mph (32 km/h) and 100 mph (160 km/h).

Perform a Test Drive: During a test drive, have a second vehicle enter the alert zone of the BSI to see if the system detects it and the indicator lights up.

Listen for Alerts: If your vehicle is equipped with an auditory alert, listen for the beeper when the system detects a vehicle in your blind spot, especially when the turn signal is engaged.

System Reset: If the system is not working as expected, try resetting it through the vehicle settings menu.

Consult the Manual: Refer to the vehicle’s owner’s manual for specific testing procedures and troubleshooting tips for the BSI system.

Professional Assistance: If you’re unable to determine the issue or the system still isn’t working, it’s best to seek professional help from an Acura service center.

How Long Does It Take To Recalibrate The Blind Spot Sensor?

Recalibrating the Blind Spot Sensor on an Acura MDX typically involves a process that should be performed by a professional technician. The time it takes can vary based on a few factors, such as the specific model year of the vehicle and the diagnostic tools available. Generally, the recalibration process can take anywhere from 30 minutes to a couple of hours. This includes the time needed to set up the calibration equipment, perform the actual recalibration, and then test the system to ensure it’s working correctly. It’s always best to consult with a certified Acura service center for the most accurate estimate and to ensure the recalibration is done properly.

Why Are My Blind Spot Lights Not Working?

If your Acura MDX’s Blind Spotlights are not functioning, it could be due to a variety of reasons. Here’s a comprehensive list of potential causes:

  • Sensor Blockage

The sensors might be blocked by dirt, debris, or snow. Clean the sensors located on the rear bumper to ensure they are clear.

  • Electrical Issues

Check for any electrical problems, such as blown fuses or loose connections, that might be affecting the sensors.

  • System Errors

The system might have encountered a software glitch. A reset or software update might be necessary.

  • Damage from Accidents

If your vehicle was recently involved in an accident, the sensors or their alignment might have been damaged.

  • Malfunctioning Sensors

The sensors themselves could be faulty and may need to be replaced.

  • Warning Messages

Other warning messages on your dashboard, like low tire pressure or the need for an oil change, can sometimes interfere with the blind spot system’s functionality.

Acura MDX Blind Spot Not Working: What to Do?

What Is Blind Spot Sensor Blocked?

“Blind Spot Sensor Blocked” is a warning message that typically appears when the sensors used for the Blind Spot Information System (BSI) are obstructed. This obstruction can be due to various reasons such as:

Accumulation of Foreign Material: Dirt, snow, rain, or other debris covering the sensors can block their ability to detect vehicles in your blind spot.

Installation of Accessories: Adding accessories like trailers or carriers may interfere with the sensor’s detection range.

Sensor Misalignment: If the sensors are misaligned, perhaps due to a minor collision or driving over a pothole, they may not function correctly.

System Malfunction: Sometimes, the system itself might have a fault, which could be due to electrical issues or a need for a software update.

Can Blind Spot Detection Be Switched Off?

Yes, the Blind Spot Detection, or Blind Spot Information System (BSI), on the Acura MDX can be turned off. The process to switch off the BSI typically involves the following steps:

Access the Vehicle Settings: From the vehicle’s Home screen, select ‘Settings’.

Select the Driver Assist System Setup: Choose ‘Vehicle’, and ensure the vehicle is in Park (P).

Navigate to the BSI Settings: Select ‘Driver Assist System Setup’, then ‘Blind Spot Info’.

Turn Off the System: Here, you’ll have the option to select an alert type or turn the system off entirely. Choose ‘Off’.

Save the Changes: Make sure to save your settings before exiting the menu.

Why Is My Side Detection Temporarily Unavailable?

The message “Side Detection Temporarily Unavailable” in your Acura MDX can occur due to several reasons, often related to issues that affect the proper functioning of the system’s sensors. Here are some common causes:

  • Inclement Weather Conditions

Heavy rain, snow, fog, or ice can obscure the sensors and affect their ability to detect objects.

  • Blocked Sensors or Cameras

Dirt, mud, or debris covering the sensors can prevent them from functioning correctly.

  • Sensor Calibration

If the sensors are undergoing calibration or adjustments, the system might be temporarily unavailable.

  • Electrical or Software Glitches

Any malfunctions within the system’s components or software can cause this message to appear.

  • Interference from Nearby Objects

In crowded environments, nearby objects might disrupt the sensor’s accuracy.


Addressing the Acura MDX Blind Spot issue requires a blend of vigilance and action. 

Whether it’s a simple sensor cleaning or a professional diagnostic, taking the necessary steps can ensure your vehicle’s safety features remain in top condition. 

Remember, the BSI is more than just a convenience; it’s a critical component that enhances your driving experience and safety. 

By following the guidance provided, you can swiftly navigate through any blind spot troubles, keeping your journey smooth and secure. 

Drive confidently, knowing that your Acura MDX is equipped to keep you aware of your surroundings at every turn.

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