Nissan Transponder Key – 4D60 Chip, NSN14 Blade Profile

Built around a 4D60 transponder chip and cut on the NSN14 keyway, the Nissan Transponder Key serves as the primary immobilizer-paired ignition key for several early-2000s Nissan auto locksmith sedans. This unit is identifiable by its mechanical blade profile — the NSN14 is a unilateral, internally-cut pattern common across this generation of Nissan Smart Key Fob – PCF7936 Chip, 433 MHz Proximity Key vehicles. Inside the key head sits the 4D60 glass capsule transponder responsible for communicating with the vehicle’s immobilizer ECU during each start cycle. Compatible vehicles share Nissan/Infiniti OEM Remote Key Fob – 315 MHz Vehicle Remote‘s factory anti-theft architecture from that era, which requires a valid transponder response before the engine control module will permit fuel delivery and ignition. A correctly enrolled Nissan Transponder Key will allow seamless engine cranking without triggering the security indicator light on the instrument cluster. Because the 4D60 chip must be cloned or registered to the vehicle’s specific immobilizer memory, the key cannot simply be cut and used — it demands a programming procedure performed with diagnostic equipment or dedicated key programming hardware.

Nissan Transponder Key Specifications and Blade Details

The NSN14 blade profile used by this key is a single-sided, internally-milled design. Locksmiths cutting the blade will recognize it as a standard automotive brass key blank requiring a high-security code machine or manual decoding from the existing key or lock cylinder. The cuts follow a spacing-and-depth scheme that corresponds to Nissan’s factory bitting specifications for the relevant model years. When sourcing blanks, it is important to confirm the blank accommodates the 4D60 transponder chip within the key head, as non-transponder NSN14 blanks exist for older Nissan models that predate immobilizer systems.

The 4D60 chip is a fixed-code transponder — once programmed to a vehicle, it transmits a static encrypted signal that the immobilizer antenna ring around the ignition cylinder reads at close range. Unlike rolling-code or crypto-based transponder systems found in newer vehicles, the 4D60 relies on a comparatively simpler authentication handshake. This does not make it less secure in practical terms for vehicles of this vintage, but it does mean the programming workflow differs from later Nissan models that migrated to 46-type or ID47 transponders.

Vehicle Compatibility

The following Nissan models have been validated as fitments for this transponder key:

• Nissan Altima — 2002, 2003, 2004
• Nissan Maxima — 2000, 2001, 2002, 2003
• Nissan Sentra — 2000, 2001, 2002, 2003, 2004, 2005, 2006

Each of these models shares the same immobilizer platform from the factory. The Sentra covers the widest year range, spanning seven model years before Nissan transitioned to updated key and immobilizer hardware. The Altima and Maxima fitments are narrower, reflecting those models’ earlier adoption of next-generation transponder systems. Owners or locksmiths working on vehicles near the boundary years should verify the existing key type before ordering, as mid-cycle production changes occasionally shifted certain VIN ranges to a different transponder.

Programming the 4D60 Transponder to Nissan Vehicles

Enrolling the Nissan Transponder Key into a vehicle’s immobilizer system requires either a diagnostic programming tool with Nissan immobilizer support or a dedicated transponder cloning device. The two primary approaches differ significantly:

On-Board Programming (OBP): Some Nissan models from this era support a key registration sequence using existing registered keys. The typical procedure involves inserting a working registered key, cycling the ignition through a specific on-off pattern within timed intervals, then switching to the new key and repeating the sequence. The exact step count and timing windows vary by model and year. If the vehicle has lost all registered keys, on-board programming is generally not available, and a diagnostic tool becomes necessary.

Diagnostic Tool Programming: Using a professional-grade automotive programmer with Nissan NATS (Nissan Anti-Theft System) coverage, a locksmith or technician can access the immobilizer ECU directly. This method reads the existing key data, registers the new 4D60 transponder, and writes it into the system’s memory. Tools from manufacturers such as Autel, Xtool, and SmartPro are commonly used in the field for this procedure. The process typically takes under ten minutes once the tool establishes communication with the BCM (Body Control Module).

Cloning: Because the 4D60 is a fixed-code transponder, it can be cloned using devices capable of reading and duplicating the chip’s data onto a new 4D60 blank. Cloning produces a key that mirrors the original transponder’s signal exactly, so no registration step at the vehicle is required. This approach is particularly useful when on-board programming is unavailable or when adding a spare key quickly without diagnostic equipment. The cloned key must still be cut to match the NSN14 blade pattern.

Practical Considerations for Vehicle Owners

For owners of the Altima, Maxima, or Sentra models listed above, replacing or adding a Nissan Transponder Key is a routine procedure that most automotive locksmiths handle on-site. The key blank and transponder chip are widely available in the aftermarket, and programming does not require a dealership visit in most cases. Aftermarket blanks compatible with the 4D60 chip and NSN14 keyway are functionally equivalent to OEM keys for ignition and immobilizer purposes, though the plastic key head may differ cosmetically.

A few points worth noting before ordering or requesting service:

• Confirm the vehicle currently uses a transponder key rather than a non-transponder mechanical key. Some base-model Sentras in the early 2000s shipped without immobilizer systems in certain markets.
• If all keys have been lost, the procedure is more involved and may require PIN extraction or EEPROM reading from the immobilizer module. This is a standard capability for qualified locksmiths but adds time and cost compared to adding a key when a working original is available.
• The key does not contain any remote or keyless-entry electronics. Door lock and unlock functions on these models are handled by a separate remote fob, if equipped. The transponder key is strictly for ignition and immobilizer authentication.

NSN14 Keyway in the Broader Nissan Lineup

The NSN14 keyway appears across multiple Nissan and Infiniti models from the late 1990s through the mid-2000s, though the transponder chip paired with it varies by platform. The combination of NSN14 with the 4D60 chip is specific to the vehicles listed above. Other Nissan models using the NSN14 blade may pair it with different transponder types — ID46, for instance, appears in some overlapping-year Nissan trucks and SUVs. Locksmiths should always verify both the blade profile and chip type before cutting and programming, as a correct blade with the wrong transponder will turn the ignition but fail the immobilizer check, leaving the engine unable to start.