2010 Jaguar XJ Key Replacement

2010 XJ key specs

The redesigned XJ arrived for 2010 with push-button start and a five-button proximity smart key (lock, unlock, trunk, lights and panic). Supplier compatibility tables list the older XF and XK fob, FCC ID KR55WK49244, for the 2010 model year, with KOBJTF10A taking over from 2011. Those tables are not always right about launch-year cars, so we confirm the fob by part number and VIN before ordering. A hidden emergency blade covers a dead fob.

What's specific to the 2010 XJ

The 2010 model year was the only year of this XJ generation (X351 (2010 launch year)), so parts catalogs list its keys on their own; we match them by part number and FCC ID rather than by what earlier or later XJs used. It also marks a change from the previous generation: the 2009 XJ used a flip key and a transponder (chip) key, while the 2010 uses a smart proximity key with push-button start. Keys from the older car will not work in this one.

A 2010 Jaguar XJ is about 16 years old. Original keys are often worn smooth, and some factory remotes for cars this age are discontinued, so we may suggest a quality aftermarket remote or a separate fob. Because older immobilizers are simpler, all-keys-lost jobs on cars this age are usually more straightforward than on late models. Smart-key cars like the 2010 XJ can be targeted with relay attacks that extend the fob's signal from inside your home, so keep fobs away from exterior walls or in a signal-blocking pouch, and have any missing fob erased from the car.

Key options for the 2010 Jaguar XJ

• Smart proximity key (push-to-start). Making a new smart key is mostly a programming job. The fob has to match the vehicle's FCC ID, frequency and chip, and then the keyless system must be told to accept it, normally through the OBD-II port. Depending on the platform, that can mean entering a PIN, waiting through a timed security procedure, or on some newer vehicles, using manufacturer online access. When every key is lost, certain models need a module removed and read on the bench. For your Jaguar XJ X351 (2010 launch year), we'll tell you which of those applies, and if a step is dealer-only, you'll hear it before we drive out. The emergency blade hidden inside the fob is cut by code during the same visit.

How the Jaguar immobilizer works on the XJ

Jaguar keys from 2000 on fall into four families, and knowing which one your car uses explains most of what a key job involves. The XJ8 (through 2003) and XK8 (through 2006) carried over from the late 1990s and use an 8-cut Tibbe key plus a separate four-button remote; on 2000-2003 cars the transponder is a Megamos crypto (ID48) chip. The S-Type, X-Type and 2004-2009 XJ share a Ford-era immobilizer and a 6-cut Tibbe key carrying a Texas Instruments 4D60 chip, usually built into a flip remote. Jaguar's Smart Key arrived with the 2007 XK and 2009 XF, a proximity fob with a Hitag2 (ID46) transponder and push-button start. From the 2011 XJ, and then the XF, F-Type, XE and F-Pace, Jaguar moved to the KOBJTF10A fob it shares with Land Rover, which uses a Hitag Pro (ID49) transponder and an HU101 emergency blade. On smart-key cars the key data lives in a keyless vehicle module (KVM), called the remote function actuator (RFA) on later models, and its software version decides how a key can be added. The E-Pace, I-Pace and the facelifted cars from about 2020 use newer fob families, where aftermarket coverage is thinner.

• US sales of the redesigned XJ began with the 2010 model year, though some price guides skip it and list 2011 first.
• As a single launch model year, the 2010 XJ sits between the older KR55WK49244 fob and the later KOBJTF10A family.

Programming a 2010 XJ key

New fobs are written into the keyless vehicle module with JLR-specific software. Adding a spare over OBD-II with a working key is the routine case. With no working key, the module may need to be removed and read on the bench, which adds time, and early-build cars sometimes go to the dealer. We check coverage for your VIN first and quote only after that.

Spare keys are routine; all-keys-lost may need module bench work or a dealer.

Lost every key to your XJ?

1. Gather your documents and the VIN. Call with the year, make, model and VIN if you can read it through the windshield, plus where the car is parked. Those details let us confirm whether your Jaguar XJ can be done on-site and bring the right key, so the first trip is the only trip.
2. Get into the vehicle without damage. Entry comes before key-making because we need access to the ignition, the OBD-II port and sometimes the documents in the glove box. We take care with weather stripping, door frames and paint, and we confirm the dash VIN matches your registration before going any further.
3. Originate a new key from the car. With no key to copy, the cuts come from the vehicle itself. We retrieve the key code through manufacturer channels where possible, or decode a door lock with a pick-decoder tool. Then we cut the blade on our code machine and confirm it turns the lock smoothly.
4. Program the key to the immobilizer. Next, the new key is introduced to the car's security system. Many vehicles allow this through the OBD-II port with a PIN or security procedure. Some all-keys-lost cases require reading a module on the bench, and a few platforms only allow dealer programming, which we'll tell you up front.
5. Erase missing keys and add a spare. A lost key's metal blade can still open your doors even after its chip is erased. If the keys disappeared along with something showing where you live or park, consider rekeying the car's door lock cylinders too. We'll also recommend leaving with two working keys, not one.

Why a spare key pays for itself

• Some vehicles make it hard to add a key once you're down to one. Certain immobilizer systems let an owner program an extra key on-board only when two working keys are present, so a second key preserves the easy options for later and avoids a full reset.
• Electronics fail without warning. A fob dropped on concrete, run through the washing machine or soaked at the pool can quit for good. With a second programmed key, that's an annoyance you fix on your own schedule, not a stranded car that needs attention today.
• When you sell or trade in the vehicle, buyers and dealers expect two keys. A missing key can come up during an appraisal or a private-sale negotiation, so having both on hand keeps the conversation about the car, not about what it will cost the next owner to replace one.

Dealer or mobile locksmith?

The biggest difference between a dealership and a mobile locksmith is where the work happens. A dealer programs keys in its service bay, so if every key is lost, the car usually has to be towed there, and you work around the service department's schedule and the time it takes to order a key by VIN. Julian's Locksmith brings the cutting machine, key blanks and programming equipment to the car, whether it sits in your driveway, a workplace lot or a parking structure. For a 2010 Jaguar XJ we can program on-site, that means no tow and no shuttle rides back and forth. The trade-off is real, though: on vehicles where only the dealer can program keys, a tow or appointment may still be necessary, and we'll say so before you spend anything on our visit.

XJ key battery

Most fobs for a 2010 Jaguar XJ open along a small slot in the seam; a coin or a plastic pry tool works better than a screwdriver, which chews up the housing. If the fob hides a mechanical blade, slide it out first, since the case often opens from that gap. Note which side of the old cell faces up, swap in a fresh CR2032, and press the halves together until they click all the way around. Handle the new battery by its edges, because skin oil on the faces can hurt contact. In most cases the fob keeps its programming through a battery change, so test lock, unlock and start, and you're done.

How the job works

1. Identify the exact key your XJ uses. We ask a few quick questions on the phone: the year, whether the car starts with a turn key or a button, how many keys you have left, and whether the remote still works the doors. Then we check the VIN against our programming references so the van arrives with the correct blank or fob, not a close guess.
2. Verify ownership before any work. Before cutting or programming, we compare your government photo ID with the vehicle registration or title and check that the VIN on the paperwork matches the VIN on the dash. If the registration is locked inside, we open the car first, confirm the documents, and only then make the key.
3. Get the key code or decode the lock. If you still have a working key, we can read its cuts directly and check them against the factory depths for the Jaguar keyway. A worn key gets corrected back to spec during this step, so the new key turns crisply instead of reproducing years of wear in a fresh piece of metal.
4. Cut the blade on-site. Our van carries a code-cutting machine that handles both traditional edge-cut blades and the laser-cut, side-milled profiles common on newer keys. The blade is cut to the code, then test-fitted in a door lock and the ignition or emergency keyhole to confirm smooth operation before any programming begins.
5. Program the chip, remote or smart key. Programming tells the car's computers that the new key belongs to the vehicle. Transponder chips are added to the immobilizer, remote buttons to the body control module, and proximity fobs to the keyless system. If a step requires dealer-only access on your XJ, you'll have heard that before we arrived, not halfway through the job.
6. Test everything and clear out old keys. Before we leave, every function gets checked: doors, trunk or liftgate, panic button, remote range, engine start, and the emergency blade in the driver's door. If keys are missing, we delete them from the car's memory where the system allows, so a lost key can no longer start the engine.

What affects the price of an XJ key

• The type of key. Price follows complexity. The more the key does, the more it costs to replace: brass blade, then chip, then remote buttons, then full keyless entry and push-button start. If your XJ came with different key styles by trim, the one your car actually uses is the one that sets the quote.
• All keys lost or adding a key. Adding a key while a working one is in hand is the simpler job. With every key gone, we may have to open the car, decode a lock to originate the cuts, and run a longer programming routine, so all-keys-lost work takes more time and costs more.
• Programming complexity and security access. Two cars with similar-looking keys can program very differently. Newer platforms often guard key programming behind encrypted access or paid credentials, while older systems allow straightforward OBD-II pairing. We check the exact procedure for your VIN before quoting, so the number reflects the real work involved.
• Blade style and cutting. The blade still matters on keyless cars, because the emergency insert has to fit the door lock. Cutting by code is standard for us. Decoding a door lock when no key or code exists adds time, and so does progressing any cuts the door lock doesn't show.

Call (951) 903-3193 with your VIN and the keys you still have, and we'll quote the job before any work starts.

Common Jaguar key problems

• Flip-key hinges on the S-Type, X-Type and 2004-2009 XJ wear out, leaving a blade that flops or won't lock open. The 4D60 chip and circuit board usually survive, so a new shell and blade can save the original remote.
• Proximity-key Jaguars, like other keyless cars, are exposed to relay attacks that stretch the fob's signal from inside your house to the car. A signal-blocking pouch and an OBD-II port lock are sensible, inexpensive precautions.
• Bargain aftermarket smart keys sometimes pair for lock and unlock yet fail the start or proximity functions. Matching the original part number and testing every function after programming avoids a second trip.

Tips from a mobile locksmith

• Never hide a spare key or fob on the outside of the car. Magnetic boxes in wheel wells and under bumpers are the first places a thief checks, and with a proximity fob, a hidden key can let anyone open the doors and drive away. Keep the spare at home or with someone you trust.
• Photograph the back of your fob and any key tag that came with the car. The FCC ID, part number and key code printed there make ordering a replacement faster and more accurate. Store the photos somewhere you can reach from any device, not only on the phone that might go missing along with the keys.
• On any vehicle with a turn-key ignition, keep the key ring light. A heavy cluster of keys, tools and charms swings with every bump and slowly wears the ignition wafers and the key itself. When the key starts to stick or needs a wiggle to turn, deal with it early, before it stops turning entirely.

Proof of ownership

Making car keys is regulated work in California. Locksmiths are licensed and overseen by the Bureau of Security and Investigative Services under the Locksmith Act, Business and Professions Code section 6980 and following, and Julian's Locksmith holds company license LCO7891. Verification protects you more than anyone: a locksmith who will make a key for whoever asks will also make one for someone who wants your car. We record your name, the vehicle and its VIN on a work order, and we politely decline jobs where ownership can't be established. You can look up our license at search.dca.ca.gov.

Need a 2010 Jaguar XJ key?

Locked out, keyless, or just tired of a fob that only works half the time? Julian's Locksmith can help with your XJ in Southern California. Have your registration and photo ID ready, call (951) 903-3193, and we'll give you an honest answer about what we can do on-site and what it will cost before we head your way.