How Do I Start My Infiniti Without Key Fob

If you’ve lost your Infiniti key fob or it’s not working, don’t panic—there are several reliable ways to start your vehicle without it. From using the physical key blade to accessing the hidden start button, this guide walks you through every step to get back on the road quickly and safely.

Key Takeaways

• Use the physical key blade: Most Infiniti key fobs have a hidden metal key that can unlock the driver’s door manually.
• Access the emergency start button: Many Infiniti models have a backup start button under the steering column or near the center console.
• Replace the key fob battery: A dead battery is the most common reason a fob stops working—swapping it out is quick and easy.
• Use the Infiniti Intelligent Key system: If your fob is nearby but unresponsive, placing it in the designated slot can allow the engine to start.
• Call Infiniti roadside assistance: If all else fails, professional help can get you back in your car without damage.
• Keep a spare fob programmed: Prevent future issues by having a backup key fob ready and programmed to your vehicle.
• Understand your model’s specific features: Different Infiniti models (Q50, QX60, etc.) may have slightly different emergency start procedures.

Introduction: What to Do When Your Infiniti Key Fob Fails

Imagine this: You’re running late for work, you grab your keys, walk up to your sleek Infiniti, press the unlock button—and nothing happens. You try again. Still nothing. Your heart sinks. Is the fob dead? Did you lose it? Or worse—is there a problem with the car itself?

Don’t worry. This is more common than you think, and it doesn’t mean you’re stranded. Modern Infiniti vehicles are designed with backup systems to help you start your car even when the key fob isn’t working. Whether your fob battery died, you misplaced it, or it’s just not responding, there are several safe and effective ways to get your Infiniti started without a functioning key fob.

In this comprehensive guide, we’ll walk you through every method—from simple fixes like replacing the battery to advanced techniques like using the emergency start button. We’ll also cover model-specific tips, preventive measures, and when to call for professional help. By the end, you’ll know exactly what to do the next time your Infiniti key fob gives you trouble.

Understanding How Infiniti Key Fobs Work

Before diving into solutions, it helps to understand how Infiniti key fobs function. Unlike traditional car keys, modern Infiniti vehicles use an advanced system called the Infiniti Intelligent Key. This keyless entry and push-button start system allows you to unlock, lock, and start your car without ever taking the fob out of your pocket—thanks to radio frequency signals between the fob and the vehicle.

The key fob communicates with your Infiniti through a series of sensors located around the car. When you approach, the car detects the fob and unlocks the doors. When you press the start button inside, the car verifies the fob’s presence and allows the engine to turn over. This system is convenient, secure, and sleek—but it also means that if the fob stops working, you might feel locked out.

Common Reasons Your Key Fob Stops Working

Several issues can prevent your Infiniti key fob from functioning:

• Dead battery: The most common culprit. Key fob batteries typically last 2–4 years but can drain faster if exposed to extreme temperatures or if the fob is used frequently.
• Signal interference: Electronic devices like smartphones, power lines, or even other key fobs can interfere with the fob’s signal.
• Damaged fob: Dropping the fob or exposing it to water can damage internal components.
• Out of range: If the fob is too far from the car (usually more than 10–20 feet), the car won’t detect it.
• Programming issues: If the fob was recently replaced or reset, it may need to be reprogrammed to sync with your vehicle.

Understanding these causes helps you troubleshoot more effectively. For example, if your fob works intermittently, it’s likely a battery or signal issue. If it stopped working suddenly after a drop, physical damage is probable.

How the Infiniti Intelligent Key System Enhances Security

The Infiniti Intelligent Key isn’t just about convenience—it’s also a security feature. The system uses encrypted signals to prevent theft. Each time you use the fob, it sends a unique code to the car. This rolling code technology makes it nearly impossible for thieves to clone your key or use signal boosters to steal your vehicle.

However, this high level of security also means that if your fob is lost or damaged, replacing it isn’t as simple as cutting a new key. You’ll need to go through Infiniti or a certified locksmith to get a new fob programmed, which can cost $200–$500 depending on the model and features.

Step-by-Step: How to Start Your Infiniti Without a Working Key Fob

Now that you understand how the system works, let’s get practical. Here’s how to start your Infiniti when your key fob isn’t responding.

Method 1: Use the Physical Key Blade

Every Infiniti key fob has a hidden physical key tucked inside. This is your first line of defense when the fob stops working.

Step 1: Locate the release button. On most Infiniti fobs, there’s a small button on the side. Press it to slide out the metal key blade.

Step 2: Unlock the driver’s door manually. Insert the key into the keyhole on the driver’s side door (usually hidden behind a small cover). Turn it clockwise to unlock.

Step 3: Enter the vehicle. Once inside, you’re ready to start the car using one of the methods below.

Pro Tip: If you can’t find the keyhole, check your owner’s manual—some models have it under a cap near the door handle.

Method 2: Replace the Key Fob Battery

A dead battery is the easiest fix. Most Infiniti fobs use a CR2032 coin cell battery, which costs less than $5 and takes just a few minutes to replace.

Step 1: Open the fob. Use a small flathead screwdriver or a coin to gently pry open the fob along the seam. Be careful not to crack the plastic.

Step 2: Remove the old battery. Note the orientation (positive side up) and lift it out with a non-metallic tool.

Step 3: Insert the new battery. Place the new CR2032 battery in the same position. Make sure it’s seated properly.

Step 4: Reassemble the fob. Snap the two halves back together and test the buttons.

Pro Tip: Keep a spare battery in your glove compartment or emergency kit. You never know when you’ll need it.

Method 3: Use the Emergency Start Button

If your fob has a dead battery but is still inside the car, you can often start the engine using the emergency start procedure.

Step 1: Locate the emergency start slot. On most Infiniti models (like the Q50, Q60, or QX60), there’s a small slot or button near the steering column or center console. It’s often labeled “Start” or marked with a key symbol.

Step 2: Insert the fob into the slot. If there’s a slot, place the entire fob inside. If there’s a button, press it while holding the fob close.

Step 3: Press the start button. With the fob in place, press the brake pedal (for automatic transmissions) and press the ignition button. The engine should start.

Example: In the Infiniti Q50, the emergency start slot is located under the steering column, behind a small panel. Slide the fob in, press the brake, and press start.

Method 4: Use the Key Fob Proximity Trick

Sometimes, even with a weak battery, the fob can still send a signal if it’s close enough to the start button.

Step 1: Hold the fob directly against the start button. Remove any cases or covers that might block the signal.

Step 2: Press the brake and start button simultaneously. The car may detect the fob’s signal and allow the engine to start.

This method works best when the battery is nearly dead but not completely gone. It’s a quick fix while you’re on the go.

Method 5: Jumpstart the Fob with a Battery Pack

In rare cases, you can temporarily power a dead fob using a small external battery.

Step 1: Use a 3V coin cell battery holder. Connect wires to the positive and negative terminals of the fob’s battery contacts.

Step 2: Attach a fresh CR2032 battery. This provides a temporary power source.

Step 3: Test the fob. Press a button to see if it responds. If it does, quickly start the car using the normal procedure.

Warning: This is a temporary fix and should only be used in emergencies. Improper wiring can damage the fob.

Model-Specific Tips for Starting Your Infiniti

Not all Infiniti models are the same. Here’s how to start some of the most popular ones without a working key fob.

Infiniti Q50 and Q60

These sedans and coupes have a well-hidden emergency start slot. Look for a small rectangular opening under the steering column. Insert the fob, press the brake, and press start. If the fob battery is dead, this method often works because the car can read the fob’s internal chip even without power.

Infiniti QX60 and QX80

SUVs like the QX60 and QX80 have a similar system. The emergency start slot is usually behind a panel near the center console. Some models also have a “key override” button that you can press with the fob nearby.

Infiniti Q70 and M-Series

Older models may require you to use the physical key to unlock the door and then place the fob in a specific spot near the start button. Check your owner’s manual for the exact location.

Infiniti G37 and Older Models

For vehicles made before 2010, the key fob may not have a push-button start. Instead, you’ll need to use the physical key to turn the ignition. Some G37 models have a keyhole behind the steering column cover.

Pro Tip: Always keep your owner’s manual in the glove box. It contains model-specific instructions for emergency starts.

Preventing Future Key Fob Issues

The best way to avoid being stranded is to prevent the problem in the first place.

Keep a Spare Key Fob Programmed

Having a second fob is a lifesaver. If your primary fob dies or gets lost, you can use the spare without missing a beat. Get it programmed by an Infiniti dealer or certified locksmith. While it costs $200–$500, it’s cheaper than towing and emergency service.

Store Your Fob Properly

Avoid leaving your fob in hot cars, near microwaves, or in direct sunlight. Extreme heat can damage the battery and internal circuits. Use a Faraday pouch or RFID-blocking wallet to protect it from signal theft.

Test the Battery Regularly

Every 6 months, test your fob’s range. If you notice it only works when you’re right next to the car, it’s time for a new battery.

Use the Infiniti Mobile App (If Available)

Some newer Infiniti models support the Infiniti InTouch app, which allows you to lock, unlock, and even start your car using your smartphone. This is a great backup if your fob fails.

When to Call for Professional Help

Sometimes, DIY methods won’t work. Here’s when to call Infiniti roadside assistance or a locksmith:

• You’ve lost the fob entirely and don’t have a spare.
• The car won’t start even after trying all emergency methods.
• You suspect the immobilizer system is malfunctioning.
• You need a new fob programmed and don’t have the tools or knowledge.

Infiniti’s roadside assistance can often unlock your car and provide a temporary solution. For permanent fixes, visit an authorized dealer.

Conclusion: Stay Prepared, Stay in Control

Losing or breaking your Infiniti key fob can be stressful, but it doesn’t have to leave you stranded. With the right knowledge, you can start your car using the physical key, emergency start button, or a fresh battery. Understanding your model’s specific features and keeping a spare fob on hand can save you time, money, and frustration.

Remember: prevention is key. Test your fob regularly, store it safely, and consider investing in a backup. And if all else fails, don’t hesitate to call for help. Your Infiniti is designed to keep you moving—even when your key fob isn’t.

Frequently Asked Questions

Can I start my Infiniti with a dead key fob?

Yes, you can often start your Infiniti even with a dead fob by using the emergency start slot or holding the fob close to the ignition button. The car can sometimes read the fob’s internal chip without battery power.

Where is the emergency start button on an Infiniti?

The emergency start button or slot is usually located under the steering column or near the center console. Look for a small opening or button labeled with a key symbol. Check your owner’s manual for the exact location.

How do I replace the battery in my Infiniti key fob?

Use a small screwdriver to gently pry open the fob, remove the old CR2032 battery, insert a new one with the positive side up, and snap the fob back together. Test the buttons to ensure it works.

What if I lost my Infiniti key fob completely?

If you’ve lost your fob, call Infiniti roadside assistance or visit a dealer. They can unlock your car and program a new fob, though it may cost $200–$500 depending on the model.

Can I use my smartphone to start my Infiniti?

Some newer Infiniti models support the Infiniti InTouch app, which allows you to lock, unlock, and start your car remotely using your smartphone. Check if your model is compatible.

How long do Infiniti key fob batteries last?

Most Infiniti key fob batteries last 2–4 years. Factors like temperature, usage, and signal interference can affect lifespan. Replace the battery if the fob’s range decreases.