2020 Isuzu NQR Key Fob Programming Guide

Commercial trucks like the 2020 Isuzu NQR are built for work, but losing a key or dealing with a broken key fob can quickly bring your business to a halt. As an ASE-certified electrical technician and locksmith, I’ve worked on countless fleet vehicles. The 2020 Isuzu NQR utilizes a transponder-equipped key system to prevent theft, meaning a simple hardware store key copy won’t start the engine.

Here is your comprehensive guide to understanding, replacing, and programming your 2020 Isuzu NQR key and remote.

Quick reference

Step-by-step on-board programming

If you are looking for a DIY method involving turning the key in the ignition a certain number of times or pressing a sequence of buttons, I have some bad news. The 2020 Isuzu NQR does not support on-board, DIY key programming.

Modern Isuzu N-Series trucks are equipped with strict immobilizer systems. To pair a new transponder key or remote fob to the truck’s Body Control Module (BCM), you must use a professional automotive diagnostic scanner or key programming tool (such as an Autel, Smart Pro, or Isuzu's proprietary IDSS software).

Because of this, the programming procedure is as follows:

1. Have the key blade cut: A locksmith or dealer must cut the physical key blank to match your truck's ignition cylinder lock.
2. Connect the OBD-II Scanner: A professional will plug a key programmer into the OBD2 port located under the driver's side dash.
3. Access the Immobilizer Menu: The technician will navigate to the Isuzu immobilizer system in the software.
4. Program the Transponder: Following the on-screen prompts, the new key is registered to the BCM.
5. Program the Remote (if applicable): The remote lock/unlock functions are typically programmed simultaneously with the transponder chip.

Battery replacement

If your current remote is suddenly failing to lock or unlock the doors, but the key still starts the truck, you likely just need a new battery.

1. Locate the slot: Look for a small notch or slot along the seam of the plastic key head or fob.
2. Pry open the shell: Use a small flathead screwdriver or a coin to gently pry the two halves of the shell apart.
3. Remove the old battery: Note the orientation of the battery (usually the "+" side faces up). Remove the old CR2032 battery.
4. Install the new battery: Insert a fresh CR2032 battery, ensuring it is seated firmly in the correct orientation.
5. Snap it shut: Carefully press the two halves of the plastic shell back together until they click securely. Test the remote.

Where to buy a replacement fob

When adding a key to your commercial fleet, you have three main options:

• The Dealership: Going to an Isuzu commercial truck dealer is the safest, most guaranteed route. They can look up your exact part number via your VIN. However, they are usually the most expensive option and require you to bring the truck to their lot. Expect to pay $150–$300+ for the key, cutting, and programming.
• Automotive Locksmith: A mobile commercial locksmith is highly recommended. They can source OEM or high-quality aftermarket transponder blanks and come directly to your yard or job site, saving you towing fees or downtime. They usually charge 20–30% less than the dealership.
• Amazon / Online Retailers: You can purchase aftermarket uncut transponder keys online for $15–$50. Pros: Very cheap up-front cost. Cons: You still have to pay a locksmith to cut and program it. Furthermore, some aftermarket chips are locked or incompatible, and many locksmiths will not guarantee customer-supplied keys.

If on-board programming isn't supported

As mentioned, since on-board programming is not an option for the 2020 Isuzu NQR, you need to budget for professional services. The truck's immobilizer relies on a specific RFID transponder chip embedded in the head of the key. If a key is cut but not programmed, it will turn in the ignition and the dash lights will come on, but the engine will crank without starting (or won't crank at all), and the security light will flash.

Expect to pay a mobile locksmith between $80 and $150 just for the programming service and cutting, depending on your location and their service call fee. Always ask if they have the software for commercial Isuzu trucks before they head out to your location, as commercial truck software differs slightly from standard passenger vehicle software.

Don't let a lost key keep your truck off the road. Find a mobile locksmith or shop on Repairius.