Lexus Key Replacement in Dallas-Fort Worth
Mobile Lexus smart key programming and all-keys-lost across DFW. G, 8A and 8A-AA immobilizers — RX, ES, NX, GX, IS, LX and UX — decoded and registered in your driveway. On the 2018+ LS 500 and on 2022+ BA-board cars we check tool coverage against your part number first.
About Our Lexus Locksmith Service in Dallas-Fort Worth
We work Lexus right across the Metroplex — the RX 350s and ES 350s on the Tollway, the GX 460s and LX 570s out of Southlake and Colleyville, the NX and UX in Plano and Frisco. Underneath the badge these are Toyotas, and that helps. On each of these Lexus generations — RX 2010–2022, ES 2013–2025, NX 2015–2021, IS 2014–2025, LX 570 2008–2021, UX 2019–2022 and the GX 460 — our reference data's OBD access note reads the same: no FCA-style security gateway, no star connector. A properly equipped mobile locksmith plugs straight into OBD-II instead of buying a dealer server session. The 2022+ NX and 2023+ RX are the carve-out — still no star connector, but the note there tells you to confirm an OBD path exists for that VIN, because smartphone key registration is a factory feature on those cars. The catch is the transponder timeline. Lexus ran six transponder families between 1998 and 2026, and the gap between a G chip and an 8A chip is the gap between a key that starts the car and an expensive paperweight. We pin the chip family down from the VIN and the surviving fob before a single blade gets cut.
Lexus Key Technology Explained
Six families, and they do not line up neatly with model years. Texas 4C, non-crypto and cloneable off a working key, covers the 1998–2000 LS400 (UCF20), the 1998–2000 SC300/SC400 (Z30) and the early GS300/GS400 (S160). Texas 4D-68 (DST40) is the bladed era: LS430 from 2001 (remote-head key, with an optional Smart Access trim), SC430 from 2002, GX470 from 2003, RX330/RX350 (XU30) 2004–2009 — and the GS S160 only from 2004, so a 2003 GS is still 4C while a 2004 GS is not. A separate Texas DST-4D smart family runs the push-start LS460 (XF40, 2007–2017) and the GS S190 (2006–2011) on 4D-67/4D-68, and the HS250h and CT200h on 4D-60/4D-67, and the notes on all four call all-keys-lost PIN-free over OBD. The Toyota 'G' chip — Texas Crypto DST80, TI-4D 80-bit — is a different animal despite the shared 'G' label, and it sits on the AL10 RX 350 (2010–2015), the J200 LX 570 (2008–2015) and the GX 460 through roughly 2019. From 2013 the 8A 'H' chip (Texas DST-AES, 128-bit) takes over ES, GS, IS, NX, RC, RX, the facelift LX 570, LS500 and LC500. The tighter 8A-AA seed — the one the notes describe as not crackable — lands on the 2020–2022 RX, the 2021+ IS, the 2020+ ES builds and the UX. Newest is the BA-board build of 8A (Page1 BA, FCC HYQ14FLC) on the 2022+ NX and 2023+ RX. One RF outlier worth knowing: the 2024+ TX runs HYQ14FLD at 434 MHz where every other Lexus in the list is 315 MHz. Every one of them cuts on the TOY48 keyway except the 1998–2000 SC300/SC400, which is a TOY40 long blade decoded with a Lishi TOY40 (TR49).
Lexus Models We Service Most Often in DFW
Lexus RX 350 / RX 450h
The 2010–2015 AL10 is the last G-chip (DST80) RX, and its record is blunt about it: G-chip generation, not 8A, do not load an 8A menu or blank. An 8A blank cuts perfectly and never starts it. The 2016–2019 AL20 is 8A on a seed that is still crackable, so the tool calculates the PIN. 2020–2022 is 8A-AA (HYQ14FLB), PIN-free over OBD on supported part numbers. 2023+ AL30 is the BA-board HYQ14FLC, where coverage is checked per part number.
Lexus ES 350 / ES 300h
The 2013–2018 XV60 uses FCC HYQ14FBA, which ships on both a G board (0020) and an AG board (2020) — we match the board, not just the FCC sticker. The XZ10 switched from HYQ14FBF to HYQ14FBZ around 2021, so ordering by model year alone buys the wrong fob. Our notes single out the FBZ part numbers especially as ones that can still need a NASTF VSP / TIS passcode.
Lexus NX 200t / NX 300 / NX 350
First-gen AZ10 is 8A, programmed all-keys-lost with a G-Box and an APB112 simulator. Watch the button count: 89904-78460 is the three-button, 89904-78470 the four-button, same HYQ14FBA / AG-2110 platform. The 2022+ AZ20 moved to the BA board, and some of those register spares through the Lexus app instead of over OBD.
Lexus GX 460
The GX 460 straddles the G-to-8A change around 2019–2020, so the fob FCC — HYQ14ACX (board 271451-5290) versus HYQ14FBF (89904-60U80) — decides the entire job before we order anything. Its record also warns that the GX 460 is known to reject aftermarket keys, so we bring OEM or verified fobs to a GX. Body-on-frame with a long OBD reset wait: the battery maintainer goes on.
Lexus IS 250 / IS 300 / IS 350
The 2014–2020 XE30 is 8A on the HYQ14FBA platform it shares with the ES and the RC coupe, so the same G-versus-AG board check applies. The 2021+ facelift is 8A-AA on HYQ14FLB and is PIN-free by OBD on supported part numbers; when the free PIN will not pull, that VIN is passcode-locked and needs NASTF VSP or the dealer.
Lexus LS 400 / LS 430 / LS 460 / LS 500
The full Lexus timeline in one nameplate: 4C on the LS400, 4D-68 on the LS430, DST-4D smart (generally PIN-free) on the XF40 LS460, and 8A on the 2018+ LS500 where all-keys-lost is described as limited and can require an ECU reset or a Toyota TIS / LSID security code. On the LS500 the notes are explicit that an add-key with an existing fob is far easier than all-keys-lost.
Common Lexus Key Problems We Solve
The spare in the kitchen drawer dies with the reset
On the 2010–2022 RX, the 2013–2025 ES, the 2015–2021 NX, the IS, the GX 460, the LX 570 and the UX the record is identical: the immobilizer reset erases every key previously registered to the car, not only the one you lost. Any surviving fob has to be present at the appointment so it can be re-registered after the reset, or it stops working the moment the reset completes.
Wrong chip family bought for a 2010–2015 RX or early LX 570
These are G / DST80 cars — the RX AL10 on HYQ14ACX and the J200 LX 570 on HYQ14AEM (board 271451-6601). An 8A blank will cut and work the door beautifully and the engine will still not turn over. We verify chip family off the physical fob or the VIN before cutting, which is why the FCC question comes first on the phone. The 2016 LX is the trap: HYQ14AEM G-chip listings run into 2016, so an early build may still be G.
PIN-free path fails on a 2020+ RX, ES or UX
The free-PIN 8A-AA route only covers specific part numbers. When the tool cannot pull the PIN, that VIN is passcode-locked and needs a NASTF VSP or Toyota TIS-level passcode. We establish that during the quote from your part number rather than discovering it in your driveway.
KEY NOT DETECTED on the dash
Usually a flat fob battery rather than a dead immobilizer. On the push-start generations whose records document a dead-fob start — RX, ES, NX, IS, GX 460, LX 570 and UX — the fallback is the same: hold the fob's logo face flat against the START/STOP button with the brake pressed, then push to start. We replace the battery and re-verify proximity range at all four door handles on-site.
How Our Lexus Key Replacement Process Works
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VIN, fob FCC and chip family before dispatch
We ask for the VIN and, if any fob survives, its FCC — HYQ14ACX, AEM, FBA, FBB, FBF, FBZ, FLB or FLC. That single detail separates G from 8A from 8A-AA from BA board, and tells us whether the part number is on the PIN-free list or passcode-locked. No guessing once we are on scene.
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Mobile dispatch across DFW
Our van comes to your driveway, office garage or roadside spot anywhere in Dallas-Fort Worth, typically arriving in 20-30 minutes.
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Decode the driver door with an Original Lishi TOY48
Push-start Lexus models have no ignition cylinder, so the emergency blade only serves the driver door lock hidden behind the handle cap. We pop the cap, pick and decode that TOY48 cylinder in place, and cut the TOY48 / LXP90 blade on the van from the decode. The 1998–2000 SC300/SC400 is the exception — TOY40 long blade, Lishi TOY40 (TR49).
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Immobilizer reset and key registration over OBD-II
We plug directly into OBD-II. The 2010–2022 RX, ES, 2015–2021 NX, IS, GX 460, LX 570 and UX access notes all record no gateway and no star connector, so no bypass harness. For 8A smart all-keys-lost we add a G-Box and an APB112 simulator held to the START/STOP button to wake the immobilizer, calculate the PIN and register the new key. The logged all-keys-lost estimate is 20-40 minutes on the 8A / 8A-AA RX (2016–2022), ES, NX (2015–2021), IS, LX 570 (2016–2021) and UX, and on the GX 460, whose single record spans both its G and 8A years; it is 20-30 minutes on the G-chip RX (2010–2015) and LX 570 (2008–2015) — with a battery maintainer on the car through the reset wait, which the big body-on-frame trucks need.
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Full function test before we pack up
Push-button start, lock, unlock, trunk and panic, proximity detection at every door handle, the emergency blade in the door cylinder, and any surviving fob re-registered after the reset — all verified on site.
Why DFW Lexus Owners Choose MyKey Locksmith
Lexus Mobile Locksmith Coverage Across DFW
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Lexus Key Replacement FAQs
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