How To Program A Infiniti Key Fob

So, you're having trouble with your Infiniti key fob, huh? You're not alone. A malfunctioning key fob can be a major headache, preventing you from unlocking your car, starting the engine, or even activating the alarm. Getting this sorted out quickly is important not just for convenience, but also for security. Imagine being stranded in a parking lot late at night because your key fob won't work! We'll walk you through some troubleshooting steps and potential solutions to get you back on the road with a fully functional key fob.

Symptoms of a Failing Infiniti Key Fob

Before we dive into fixes, let's identify the common symptoms of a failing Infiniti key fob. Recognizing these signs early can save you time and frustration.

Inability to unlock/lock doors remotely: This is the most common symptom. You press the buttons on the fob, but nothing happens. The car doors remain stubbornly locked or unlocked.
Difficulty starting the engine: Even if you can get inside the car, the engine might not start. The car may display a "Key Not Detected" message on the dashboard.
Intermittent functionality: The key fob might work sometimes but not others. This inconsistency can be incredibly frustrating.
Reduced range: You need to be much closer to the car than usual for the key fob to work.
Panic alarm malfunction: The panic alarm might not activate or deactivate when you press the button on the fob.
Indicator light issues: The red or green light on the key fob itself might not light up when you press a button, indicating a problem with the fob's internal circuitry.
The car's security system acting erratically: False alarms or other unusual security system behavior could be linked to a faulty key fob.

Root Causes of Key Fob Problems

Understanding why your key fob is failing is crucial for finding the right solution. Several factors can contribute to key fob malfunctions:

Dead or Weak Battery: This is the most common culprit. Key fobs run on small coin-cell batteries, which eventually need replacing. The CR2032 battery is a common type, but it’s always best to check your owner's manual to confirm the correct type for your specific model.
Damaged Key Fob: Dropping the key fob, exposing it to water, or subjecting it to extreme temperatures can damage its internal components. Cracks in the casing can also allow moisture to enter.
Signal Interference: In rare cases, strong radio frequency (RF) interference from other devices can disrupt the key fob's signal. This is more likely in densely populated areas with many electronic devices.
Faulty Key Fob Programming: Sometimes, the key fob simply loses its programming and needs to be re-synchronized with the car's computer. This can happen due to a software glitch or battery disconnection.
Receiver Issues in the Vehicle: Less commonly, the problem might be with the receiver in the car itself that detects the key fob's signal. This requires more in-depth diagnostics.
Corrosion on battery contacts: Moisture or humidity can cause corrosion on the battery contacts inside the key fob, preventing proper electrical contact.

What Happens If You Ignore the Problem?

Ignoring a failing key fob isn't just inconvenient; it can lead to more serious problems:

Stranding: You could be stranded if the key fob completely fails, preventing you from unlocking or starting your car.
Security Risk: If the key fob intermittently unlocks the car, it could leave your vehicle vulnerable to theft.
Increased Wear and Tear: Repeatedly using a physical key to unlock the car can cause wear and tear on the door lock mechanism.
Emergency Situations: In an emergency, a malfunctioning key fob could delay your ability to access or start your car.
Costly Repairs Down the Line: Ignoring minor issues can sometimes lead to more significant problems that require expensive repairs. For example, repeatedly trying to start a car with a weak key fob signal could potentially strain the car's starter motor.

Recommended Fixes for Your Infiniti Key Fob

Here are some recommended fixes, starting with the simplest and most common solutions:

Replace the Battery: This is the first and easiest thing to try. Open the key fob casing (usually requiring a small screwdriver or a thin tool to pry it open) and replace the battery with a new one of the correct type. Ensure the battery is installed with the correct polarity.
Clean the Battery Contacts: If replacing the battery doesn't work, check the battery contacts inside the key fob for corrosion. Use a cotton swab dipped in rubbing alcohol to gently clean the contacts.
Resynchronize the Key Fob: Some Infiniti models allow you to resynchronize the key fob yourself. Consult your owner's manual for specific instructions. Typically, this involves inserting the key into the ignition, turning it to a specific position, and pressing a button on the key fob.
If your Infiniti has Intelligent Key system (keyless entry and start), you may need to use a procedure similar to this:
- Get in the vehicle, closing all doors.
- Insert the key into the ignition and quickly turn the key from the "off" position to the "on" position 6 times, within 10 seconds.
- The hazard lights should then flash twice to confirm programming mode.
- Remove the key from the ignition.
- Press and hold the "lock" button on the key fob. While holding the lock button, press the "unlock" button 3 times.
- Release both buttons. The doors should lock and unlock to confirm successful programming.
- Repeat step 6 for any additional key fobs you want to program.
- Insert the key into the ignition to exit programming mode.
Important Note: This is a general procedure and may not be applicable to all Infiniti models. Always consult your owner's manual for the correct procedure for your specific vehicle.
Check for Interference: Try using the key fob in a different location to rule out signal interference. Move away from potential sources of interference, such as cell phone towers or other electronic devices.
Professional Reprogramming: If the above steps don't work, you may need to have the key fob professionally reprogrammed by a dealership or a qualified automotive locksmith. They have the necessary equipment to reprogram the key fob to your car's computer.
Key Fob Replacement: If the key fob is severely damaged, it may need to be replaced entirely. A dealership or automotive locksmith can provide a new key fob and program it to your vehicle.
Check the Car Battery: While less likely, a weak car battery can sometimes cause issues with the key fob system. Have your car battery tested to ensure it's in good condition.

Cost Estimates and Shop Advice

Here's a general idea of the costs you might encounter:

Battery Replacement: A new battery typically costs around $5-$10.
Professional Reprogramming: Reprogramming can range from $50 to $150, depending on the dealership or locksmith and the complexity of the programming.
Key Fob Replacement: A new key fob can cost anywhere from $150 to $400, including programming. Dealerships tend to be more expensive than locksmiths.
Diagnostic Fees: If the problem is with the car's receiver, expect to pay a diagnostic fee (typically around $100) to pinpoint the issue.

Shop Advice:

Call Around: Get quotes from multiple dealerships and automotive locksmiths before committing to any repairs.
Read Reviews: Check online reviews of dealerships and locksmiths to ensure they have a good reputation for key fob programming.
Ask About Warranties: Inquire about warranties on new key fobs and programming services.
Consider a Locksmith: Automotive locksmiths often offer more competitive pricing than dealerships for key fob replacement and programming.

Technical Service Bulletins and Common Failures

While specific Technical Service Bulletins (TSBs) related to key fob issues vary by Infiniti model and year, it's always a good idea to ask your dealership's service advisor if any TSBs apply to your situation. TSBs often address common issues and provide specific repair procedures.

Based on community data and anecdotal evidence, some Infiniti models, particularly those from the mid-2000s to early 2010s, seem to experience more frequent key fob failures. This could be due to aging components or specific design flaws in those models. Online Infiniti forums are a great resource for finding information about common key fob problems and potential solutions for your specific model.

By following these troubleshooting steps and seeking professional help when needed, you can resolve your Infiniti key fob issues and regain full functionality of your vehicle.