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The ignition switch in your Acura MDX is an essential component for the smooth start of your vehicle. It can be faulty for many reasons that need immediate fixation to enjoy a stress-free start. How do I fix Acura MDX ignition switch problems?

A blown fuse is the major issue with a bad ignition switch on an Acura MDX. You will need to replace it to remove the issue. To fix the problem, however, it might also be necessary to check for problems like faulty ignition coils, bad wafers, broken springs, and binding steering wheels.

I am here to help you identify and fix the Acura mdx ignition switch problems. Keep reading to learn easy techniques to save money and time.

Symptoms of Acura MDX Ignition Switch Problem

Symptoms of Acura MDX Ignition Switch not working
Symptoms of Acura MDX Ignition Switch not working

If the ignition switch in your Acura MDX is faulty, you may experience the below issues.

  • Your vehicle struggles to start, and it needs multiple attempts.
  • Frequent stalling while idling or driving is a common sign of a faulty ignition switch.
  • You may also experience a power loss issue, especially when accelerating your vehicle; it starts struggling.
  • Your accessories, such as radios, lights, power windows, or others, may also need to be fixed.
  • Difficulty in turning or removing the key from the ignition switch.
  • Engine misfires while driving are also a possible sign of a faulty ignition switch.
  • An illuminated warning light on your dashboard.

Causes of Acura MDX Ignition Switch Problem

Your Acura MDX ignition switch can be faulty for multiple reasons. You need a detailed check to diagnose the exact problem. However, for a quick fix, I have listed the 5 common problems you must check first.

  • Broken Springs
  • Steering Wheel Binding
  • Bad Wafers
  • Blown Fuse
  • Faulty Ignition Coil

Fix your Mazda 3 Ignition Switch issues by visiting this link: Mazda 3 ignition switch problem and fixing.

Acura MDX Ignition Switch Problems and Solutions

acura mdx ignition switch problems
Acura MDX ignition switch

Problem 1: Broken Springs

Springs in the ignition switch maintain the correct alignment of the components for smooth functioning. If the spring is brought, there may be an issue of misalignment, which may prevent the switch from performing its functions. You may need a spring replacement.


  • Turn the vehicle off and disconnect the battery to prevent accidental electrical discharge.
  • Access to the ignition switch is located on your Acura MDX dashboard near the steering column.
  • Unscrew the steering column and locate the lock cylinder on your ignition switch. Release the lock cylinder using an appropriate tool.
  • Then, check the spring’s health and ensure it has proper tension; if it is loose, it also needs replacement.
  • Install the new spring and reassemble the lock cylinder and ignition switch. 
  • Reconnect the battery and turn the vehicle “ ON.”
  • Take a test ride and ensure the ignition switch is functioning correctly.

If your ignition switch on your Ford F150 has problems, fix it after reading this blog: Ford F150 Ignition Switch Problems

Problem 2: Steering Wheel Binding

Steering Wheel Binding

An ignition switch issue may be caused by a binding steering wheel. The electrical components in the steering column may become strained if there is too much resistance when turning. This strain may cause damage to the ignition switch or its wiring.


  • First, find out the area where the steering wheel binds while turning.
  • Now, carefully check the components and wiring near the binding point for wear or tear.
  • If wires are broken, repair or replace them.
  • Also, check for the other components and repair them if needed.
  • Once checked, lubricate them; you can use any lubricant materials. I recommend the Super Lube 21010 Synthetic Multi-Purpose Grease for that purpose.
  • Once the issues, turn and test the steering wheel and ensure it is moving smoothly. 
  • Now, switch on the vehicle and ensure the ignition switch works properly.

Problem 3: Bad Wafers

Wafers in the ignition switch ensure proper electrical connections. If wafers wear down over time, you may experience electrical connection issues. Bad electrical connections may lead to problems with the ignition switch. The ignition switch may fail to perform its function.


  • First access to the ignition switch, in Acura MDX, is usually located on the steering column.
  • Disassemble the ignition switch and carefully inspect the wafers. Check for wear and tear cracks or uneven surfaces. 
  • If the wafers are damaged, you will need replacements. While replacing, you have purchased the compatible wafers.
  • Once the wafers are replaced, reassemble the ignition switch.
  • After that, turn your vehicle on and make sure the ignition switch problem has gone away.

It may also help you fix ignition coil issues on Dodge Charger: Dodge Charger Ignition coil problems

Problem 4: Blown Fuse

A blown fuse in an Acura MDX may also be the reason for your ignition switch problems. It can disrupt the power supply to the ignition system for regular operations. It is good to check the ignition switch fuse to fix the issue.


  • Turn your Acura MDX OFF and open its hood.
  • Locate the fuse box near the engine. 
  • Read the instructions on the fuse box to locate the fuse for the ignition switch.
  • Once you find the fuse, inspect it physically.
  • If the fuse is blown, remove it and replace it with a similar one. You can purchase similar amperages; I recommend the Nilight Fuse Assortment for the Acura MDX ignition switch.
  • After replacement, close the fuse box and the car’s hood.
  • Switch on your vehicle and ensure the ignition switch is functioning accurately.

Problem 5: Faulty Ignition Coil

Acura MDX Faulty Ignition Coil
Acura MDX Faulty Ignition Coil

The ignition coil is responsible for a consistent power supply in the ignition system. If the ignition coil is damaged, it can also disrupt the power supply in the system. Due to poor power supply, the ignition switch may fail to perform its functions.


  • Locate the ignition coil near the engine compartment.
  • Check for wear and tear or other damages such as cracks or corrosion.
  • If the coil is damaged or blown, you will need a replacement.
  • Use a compatible ignition coil. For the Acura MDX, I recommend the SCITOO Ignition Coil Set.
  • Remove the old ignition coil and install the new ignition coil. Make sure it is securely mounted.
  • Once done, switch on your vehicle to ensure there is no ignition switch issue.

Visit this link if you have time; it might help you resolve ignition problems: Volkswagen Jetta Ignition Switch Problems

Acura MDX Ignition Switch Replacement

Acura MDX Ignition Switch Replacement
Acura MDX Ignition Switch Replacement

Follow my simple instructions below to replace the ignition switch on your Acura MDX.

  • First, disconnect the battery to prevent electrical hazards.
  • Remove the steering column covers and panels.
  • Remove the wiring connectors and release the mounting screws securing the ignition switch.
  • Gently remove the ignition switch and install the new ignition switch in its place. Make sure you have mounted it securely. Engage the connectors and reassemble the cover and steering column.
  • Reconnect the battery and switch on your vehicle to ensure you have properly replaced the switch.

Acura MDX Ignition Switch Replacement Cost:

The cost of an Acura MDX ignition switch replacement can vary. It may change due to price differences between different ignition switch brands. If you seek professional help, it increases even more. On Average, the cost can be anywhere from $150 to $300.

Acura MDX Key Won’t Turn

There can be multiple reasons why a key won’t turn on your Acura MDX. However, some common reasons include the steering lock, worn-out key, and faulty ignition cylinder.


  • First, look for any damage to your key. If the key is faulty, replace it.
  • If key is okay, then check for the steering wheel lock if you see the steering wheel is locked. Gently move it left and right to unlock it.
  • But if issues still exist, check for the ignition cylinder after reassembling the ignition switch. If the ignition cylinder is damaged, replace it.
  • Test and ensure the key is turning properly without any hassle.

It may help you fix ignition switch problems on your Dodge Ram: Dodge Ram ignition switch problems.

Acura MDX Ignition Switch Recall

Acura has issued a recall facility for buyers to get their ignition switch problems fixed for free. If you want to avail yourself of the facility, follow the steps below.

  • Check for the ignition switch recall on the Acura website
  • Provide your vehicle number for verification
  • Once they have booked your recall, wait and bring your vehicle to the dealership on the provided date and time to get your ignition switch replaced for free.

Frequently Asked Questions (FAQs):

Why does Acura RDX not start, but the lights come on?

Your Acura RDX may only start after the lights come on for a few reasons. But the few significant reasons are a faulty starter, ignition switch, and faulty battery. You must check for these issues to fix the problem.

How do you reset an ignition switch?

Resetting the ignition switch on the Acura MDX is easy; follow the steps below and reset it.
01. Turn the Key into the “ ON” position and wait 10 minutes and 30 seconds.
02. Then turn your key to “OFF” and let it run for 10 seconds only.
03. Again, turn it to the “ ON” position for another 10 minutes and 30 seconds.
04. Then, turn it to “OFF” for 10 seconds.
05. Turn the key to “ON” for the third time for 10 minutes and 30 seconds.
06. Then, turn it to “OFF” for 10 seconds.
07. Now switch on your vehicle to start the engine; your ignition switch has been reset.

Can an ignition switch be repaired?

The majority of the time, you can easily repair any damaged components. However, if the switch itself is damaged, then it is better to replace it instead of repair it. It may cause issues frequently.

Can you bypass a bad ignition switch?

It is possible to start your car with a bad ignition switch by jump-starting it. But do not make it your habit, because such DIY ideas can fail when you are in a hurry.


Acura MDX ignition switch works smoothly, but over time, it may show problems. No worries; you can fix the issues if you identify the cause. Once the cause is identified, fix it following my instructions. However, if you are not confident in your mechanical skills, do not try it. It is better to get assistance from a professional mechanic.

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