2021 Isuzu NQR Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

Good news! Unlike many modern vehicles that require expensive scan tools, most Isuzu N-Series trucks, including the 2021 NQR, feature a straightforward, do-it-yourself programming procedure for new remote fobs. You don't need any special equipment, but you must have at least one working key. This procedure only programs the remote functions (lock/unlock); it does not program a new key transponder.

Follow these steps carefully:

1. Get Ready: Gather all your remotes—both existing and new ones. This procedure will erase all previously programmed remotes, so you must reprogram them all in one session. Sit in the driver's seat with the door closed.

2. Insert Key: Insert a working key into the ignition, but leave it in the OFF position.

3. Ground the Pin: Locate the single programming wire. It is typically a lone black or black-with-white-stripe wire with a female connector, found under the dash near the steering column. It may be taped to another harness.

4. Initiate Programming Mode: While the key is in the ignition (in the OFF position), ground the programming wire. You can do this by touching the metal connector at the end of the wire to any bare metal part of the truck's chassis, such as the steering column support bracket or a bolt head under the dash. Hold it there.

5. Cycle the Ignition: While continuing to ground the wire, cycle the ignition ON and OFF five times rapidly, ending in the OFF position. The door locks should cycle (lock and then unlock) to confirm that the truck has entered programming mode.

6. Program Remotes: Within 10 seconds of the locks cycling, press the "LOCK" button on your first remote. The door locks should cycle again to confirm the remote was accepted. Repeat this step for each additional remote you want to program.

7. Exit Programming Mode: To exit programming mode, simply remove the ground connection from the programming wire. Test all remotes to ensure they are working correctly.

Battery replacement

If your remote's range is diminishing or it works intermittently, the battery is likely weak. The 2021 Isuzu NQR fob uses a single CR1616 battery.

1. Open the Case: Use a small flathead screwdriver to gently pry the two halves of the fob case apart. There is usually a small notch along the seam for this purpose.
2. Remove Old Battery: Note the orientation of the old battery (usually positive "+" side is facing up) and remove it.
3. Insert New Battery: Slide the new CR1616 battery into place, ensuring the correct polarity.
4. Snap it Shut: Reassemble the two halves of the remote case, ensuring they snap together securely.

Where to buy a replacement fob

• Isuzu Dealer: The most expensive option, but guarantees you get a genuine OEM remote. Expect to pay $100-$150 for the part itself, plus a potential labor charge if you ask them to program it.
• Automotive Locksmith: A mobile locksmith can often provide an OEM or high-quality aftermarket fob and program it for you for less than the dealer. This is an excellent, convenient option. Ballpark cost is typically $80-$140 for the fob and programming service combined.
• Amazon/eBay: You can find many aftermarket fobs online for as little as $15-$30. The quality can be a gamble, with some failing prematurely. However, since the 2021 NQR has a simple DIY programming procedure, this is a very low-risk, low-cost option. You just program it yourself following the steps above.

If on-board programming isn't supported

For the 2021 Isuzu NQR, the on-board procedure described above is standard for programming the remote portion of the fob. However, it's crucial to distinguish this from programming the immobilizer transponder in a key.

Isuzu keys contain a transponder chip that the vehicle must recognize to allow the engine to start. If you need a completely new key, simply cutting a new blade is not enough. The new key's transponder must be programmed to the vehicle's immobilizer system. This process cannot be done via the on-board procedure; it requires a specialized diagnostic scan tool used by automotive locksmiths or the Isuzu dealer. Expect to pay $120-$250 for a new key to be supplied, cut, and programmed.

Find a mobile locksmith or shop on Repairius.