Nissan Altima key replacement in Los Angeles

Nissan Altima keys by year

Which Altima key do you actually have?

Nissan has built the Altima with several very different key setups, and the model year tells us most of what we need to know. From 2000 through 2006 it is a bladed transponder key that you turn in the ignition. From 2007 on it is an Intelligent Key with push-button start. Inside those push-button years there are three separate chip families, and some of the fobs look so alike that people order the wrong one.

This page walks through each era the way we would explain it at the counter: what the key is, what we need from you, and what is realistic if every key is gone. The year-by-year table on this page lists the details model by model. The writing here covers what a table can't, mainly the traps that sit on the boundaries between years. Our verified data starts at 2000, so for a 1998 or 1999 Altima we confirm everything by VIN before we touch a key.

The immobilizer Nissan calls NATS arrived during the second-generation (L30) run, with a Texas 4D60 chip. A 2000 or 2001 Altima already needs a chipped key, and every Altima since has needed one too.

The Altima is one of many models we handle. The Nissan key replacement page covers the rest of the brand, and our car key services page shows the wider picture.

What do 2000 to 2006 Altimas need?

The 2000 and 2001 cars are the L30 generation, and 2002 through 2004 are early L31. All five years use the NI02/NSN11T2-type bladed key with a 4D60 Texas fixed-crypto chip, and our sources agree on that. It is one of the more settled corners of the Altima line. The system behind it stores a 4-digit NATS PIN that is derived from the car's body control module. We program new keys through the OBD port, and that works even when no key is left. None of these years is dealer-only.

Owners of this era usually come to us with one of three problems. The key sticks or stops turning because the ignition wafers are worn on a high-mileage car. The NATS security light stays on because the immobilizer can't read a worn or badly cloned chip. Or a hardware-store copy opens the doors but won't start the engine. That last one is the most common misunderstanding. A blade cut without a chip is only a door key.

The 2005 and 2006 cars are where the catalogs disagree, and we would rather say so than guess. Listings for the NI04T key put the 2005 and 2006 Altima on an ID46 (Philips Hitag-2) chip. One catalog still carries the older 4D60 listing through 2006. Both can't be right for a given car, so our data marks these two years as conflicting.

For a 2005 or 2006 we never cut from the year alone. We confirm from the stamp on your existing key or from the VIN, then we confirm the chip before programming. The car is OBD programmable and all-keys-lost is possible, but the right blade and chip have to be matched first.

The usual complaints on these two years are worn ignition wafers and key blades on high-mileage cars, cracked key shells, broken remote buttons and dead remote batteries. Sometimes a new shell or battery solves a remote problem without replacing the whole key, and we will tell you if that is the case.

What about the 2007 to 2012 Intelligent Key cars?

The 2007 redesign (L32) put Intelligent Key with push-button start on every US trim from launch. A 2007 to 2012 Altima has nothing to turn in the ignition. The fob uses an ID46 Hitag-2 (PCF7952) chip and is programmed through OBD. A duplicate needs a working original, and all-keys-lost is possible.

Every one of these fobs carries a mechanical backup key to get into the car if the fob dies. If the car says 'key not detected' and the fob battery is dead, hold the fob against the start button. The car can often read it at that close range and let you drive. Try that before you call anyone.

The big thing to know about this generation is the electronic steering-column lock, or ESCL. When it fails, the car won't start and a key light flashes, and that looks exactly like a key problem. People buy a new fob and the car still won't start. If a good fob is recognized and the car still refuses, the fob was never the issue. We would rather tell you that up front than sell you a fob that doesn't fix anything.

Lost-fob replacement on these costs more than the older bladed keys. You are replacing a smart fob with a chip and a radio inside, not cutting a piece of brass.

How do 2013 to 2018 Altima fobs differ?

The L33 Altima keeps push-button start as standard, and the fob uses the same FCC ID, KR5S180144014, across the whole run. This is the trap on this generation. Behind that one FCC ID are two different chips:

• 2013 to 2015: ID47 (Hitag-3) chip, fob IC ending 014.
• 2016 to 2018: 4A (Hitag-AES) chip, fob IC ending 204.

Why the FCC ID alone isn't enough

The two fobs look the same and carry the same FCC ID, but they do not interchange across the 2015/2016 boundary. Matching the FCC ID is not enough. The IC number has to match too, and the safest check is the VIN. This is also why aftermarket fobs whose FCC ID or IC numbers don't match the original often fail to pair. If you bought a fob online and it won't program, this is the first thing we look at.

Both chip generations are OBD programmable, our data lists no registry-credential requirement, a duplicate needs a working original, and all-keys-lost is possible. The most common problems we see on these years are dead fob batteries, water-damaged fobs and crushed fobs. A fob that has been through the wash, or one that got sat on, often stops talking to the car entirely.

What about 2019 to 2025 Altimas?

The L34 generation uses KR5TXN-series smart keys with a 4A (Hitag-AES) chip. This is the 20-digit rolling-PIN era. Our data says these cars are OBD programmable with professional tools, with online PIN calculation on newer cars, and all-keys-lost is listed as possible.

Here is the honest caveat. For 2019 and newer, our data leaves the question of extra registry or credential requirements open rather than answering it either way. So we confirm the exact setup by VIN before we promise a path. If a particular car turned out to need something we can't do, we would say so before starting, not after.

The 2022 through 2025 model years carry a second caveat. The 4A chip family is verified for the L34 generation through catalog coverage up to 2021 and carried across the unchanged run, but it is marked unverified for those later years individually. We confirm the exact key and chip by VIN on each of those cars. Nissan ended Altima production with the 2025 model year, so 2025 is the last one, and there is no 2026 Altima to look up.

Dead fob batteries and water or crush damage are the usual reasons we see these fobs, and the backup move is the same as on older push-button cars: hold the fob to the start button.

Duplicate or all keys lost: what is realistic for each era?

Across every year in our data, making a duplicate needs an existing working key, and an all-keys-lost job is possible. Those two facts don't conflict. A duplicate is simpler because nothing has to be recovered from the car first. With no key, we work from the car's own security data, which takes more steps and usually more cost. If you still have one key, get a spare made now, because it is the easier and lighter-cost position to be in.

Here is how it breaks down by era:

• 2000 to 2004: 4-digit NATS PIN derived from the body control module, OBD programming, all-keys-lost possible.
• 2005 and 2006: OBD programming, but we confirm the chip from the key stamp or VIN first because catalogs conflict.
• 2007 to 2012: Hitag-2 smart fob, OBD programming, all-keys-lost possible.
• 2013 to 2018: OBD programming, and the fob must match the correct chip generation (2013 to 2015 versus 2016 to 2018).
• 2019 to 2025: OBD programming with professional tools and online PIN calculation on newer cars, with the exact setup confirmed by VIN.

How does programming work, and is anything dealer-only?

For every Altima year in our data the programming method is OBD, meaning we connect to the diagnostic port under the dash. None of the years from 2000 through 2018 requires NASTF/SDRM access. For 2019 and newer that point is not confirmed in our data, so we check by VIN. Based on what we have, we are not telling anyone that an Altima is dealer-only, but we are also not going to claim certainty where the data doesn't give it.

A typical job goes like this:

1. You call and tell us the year, whether you have any key left, and where the car is. Have the VIN ready if you can read it off the dash or door jamb.
2. We confirm the exact key and chip from the VIN, and from your existing key's stamp if you have one. This step matters most on 2005 and 2006 cars, on 2013 to 2018 cars, and on 2022 to 2025 cars.
3. We ask for proof the car is yours before making a key for it.
4. We cut the backup blade where one is needed, or source the correct fob for the chip generation.
5. We program the key through OBD, then test it: door, start, and any remote functions. Every key, old and new, gets tested.

What affects the cost of an Altima key?

We won't quote a number from a web page, because the honest answer depends on the car in front of us. These are the factors that actually move the cost:

• Which era you drive. A bladed transponder key from 2000 to 2006 is a simpler job than a push-button fob, and lost-fob replacement on 2007 and later cars costs more than the older bladed keys.
• Whether you still have a working key. A duplicate is simpler than an all-keys-lost job.
• The correct chip and fob. Ordering the wrong 2013 to 2018 fob wastes money, because the fobs look identical but the chips differ.
• The condition of the old fob. Sometimes only a shell or battery is needed, and sometimes the fob is water-damaged or crushed beyond saving.
• What the real fault is. On 2007 to 2012 cars, a failed steering-column lock can mimic a bad key. Worn ignition wafers can mimic one on older cars.
• Where the car is. We run mobile vans and a storefront at 10740 Wilshire Blvd in Westwood, and the logistics of reaching you are part of the job.

Common Altima key problems and what they usually mean

Most calls about this car fit one of these patterns, and the cause is often something other than what the owner assumes:

• Key sticks or stops turning (2000 to 2006): worn ignition wafers on a high-mileage car, so the lock may need attention, not just the key.
• NATS security light stays on (2000 to 2004): the immobilizer isn't reading a worn or badly cloned chip.
• A copy opens the doors but won't start the car: it was cut without a transponder chip, so it is only a door key.
• 'Key not detected' on a push-button car: usually a dead fob battery. Hold the fob to the start button as a backup.
• Flashing key light and no start (2007 to 2012): the electronic steering-column lock, often mistaken for a key problem.
• A new fob won't pair (2013 to 2018): mismatched FCC ID or IC numbers, or the wrong chip generation.
• Cracked shells, broken remote buttons or dead remote batteries: often fixable without replacing the whole key.

When should you call us, and when is the dealer the right call?

Call us when the car is stuck, when you have lost the last key, when you want a spare made while you still have one, or when a fob won't pair. We are one company with a storefront in Westwood and mobile vans, not a dispatch service passing your call along. We have been in business since 1987 and serve 140 cities across Los Angeles and Ventura counties. David, our owner and lead technician, oversees the work. The phone is answered 24 hours a day, 7 days a week, at (213) 577-1366.

A car that won't start can't be driven to a dealer, and towing it is its own expense, so on-site service is often the lighter-cost route. That is often, not always. The dealer can be the right call if you have coverage that includes keys, or if our diagnosis shows the fault is a failed steering lock or another module and not a key at all. We would rather point you there than sell you a fob that won't fix it.

California requires locksmith companies to hold a BSIS LCO license, and you should ask any locksmith for it before work begins. When you are ready, reach us through the contact page or call directly. You can also start from the Wilshire Lock & Key home page to see everything else we do.

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