Toyota, Lexus and Scion engine ECU part numbers — find yours by year, model or label
Every Toyota, Lexus and Scion engine computer sold in the US since 1998, the Denso generation it runs and the 89661 model code on its label. Found it? Clone it onto a donor for $350 flat, or book the remote Techstream session.
Look up your ECU
Type a year, a model, an engine, an ECU family or the part number from the label. Results link to the clone and to the remote adaptation.
35 model generations in the catalog. Type to narrow it down.
By model and year
- 1.8 4-cyl (1ZZ-FE)1ZZ-FEDenso pre-CAN engine ECU to ~2004, Denso Gen1 (NEC 76F00xx) after
- 1.8 4-cyl (2ZZ-GE, Matrix XRS)2ZZ-GEDenso Gen1 (NEC 76F00xx)
2009–2013
- 1.8 4-cyl (2ZR-FE)2ZR-FEDenso Gen1 (NEC 76F00xx)
- 2.4 4-cyl (2AZ-FE, XRS / Matrix)2AZ-FEDenso Gen1 (NEC 76F00xx)
2014–2019
- 1.8 4-cyl (2ZR-FE / 2ZR-FAE)2ZR-FE, 2ZR-FAEDenso Gen2 (D76F01xx / 02xx)
- 1.8 / 2.0 4-cyl2ZR-FAE, M20A-FKSDenso Gen3 (Renesas R7F7012xx, RH850)
- 1.8 / 2.0 hybrid2ZR-FXE, M20A-FXSDenso Gen3 (Renesas R7F7012xx, RH850)
1997–2006
- 2.2 / 2.4 4-cyl5S-FE, 2AZ-FEDenso pre-CAN engine ECU, Denso Gen1 (NEC 76F00xx) on the last years
- 3.0 / 3.3 V61MZ-FE, 3MZ-FEDenso pre-CAN engine ECU, Denso Gen1 (NEC 76F00xx) on the last years
- 2.4 / 2.5 4-cyl2AZ-FE, 2AR-FEDenso Gen1 (NEC 76F00xx) (2007–2011), Denso Gen2 (D76F01xx / 02xx) (2012–2017)
- 3.5 V62GR-FEDenso Gen1 (NEC 76F00xx) (2007–2011), Denso Gen2 (D76F01xx / 02xx) (2012–2017)
- 2.4 / 2.5 hybrid2AZ-FXE, 2AR-FXEDenso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
2018–2026
- 2.5 4-cylA25A-FKSDenso Gen3 (Renesas R7F7012xx, RH850)
- 3.5 V6 (2018–2024)2GR-FKSDenso Gen3 (Renesas R7F7012xx, RH850)
- 2.5 hybridA25A-FXSDenso Gen3 (Renesas R7F7012xx, RH850)
- 3.0 / 3.5 V61MZ-FE, 2GR-FE, 2GR-FKSDenso pre-CAN engine ECU → Denso Gen1 (NEC 76F00xx) → Denso Gen2 (D76F01xx / 02xx); Denso Gen3 (Renesas R7F7012xx, RH850) from 2019
- 2.5 hybrid (2013+)2AR-FXE, A25A-FXSDenso Gen2 (D76F01xx / 02xx); Denso Gen3 (Renesas R7F7012xx, RH850) from 2019model code confirmed by label
- 1.5 / 1.8 / 2.0 hybrid1NZ-FXE, 2ZR-FXE, M20A-FXSDenso pre-CAN engine ECU / Denso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx); Denso Gen3 (Renesas R7F7012xx, RH850) from ~2019
2001–2018
- 2.0 / 2.4 / 2.5 4-cyl1AZ-FE, 2AZ-FE, 2AR-FEDenso pre-CAN engine ECU → Denso Gen1 (NEC 76F00xx) → Denso Gen2 (D76F01xx / 02xx)
- 3.5 V6 (2006–2012)2GR-FEDenso Gen1 (NEC 76F00xx)
- 2.5 4-cylA25A-FKSDenso Gen3 (Renesas R7F7012xx, RH850)
- 2.5 hybrid / plug-inA25A-FXSDenso Gen3 (Renesas R7F7012xx, RH850)
- 2.4 / 2.7 4-cyl2AZ-FE, 1AR-FEDenso pre-CAN engine ECU → Denso Gen1 (NEC 76F00xx) → Denso Gen2 (D76F01xx / 02xx)
- 3.0 / 3.3 / 3.5 V61MZ-FE, 3MZ-FE, 2GR-FE, 2GR-FKSDenso pre-CAN engine ECU → Denso Gen1 (NEC 76F00xx) → Denso Gen2 (D76F01xx / 02xx)
- 3.3 / 3.5 hybrid3MZ-FE, 2GR-FXEDenso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
- 3.5 V6 (2020–2022) / 2.4 turbo (2023+)2GR-FKS, T24A-FTSDenso Gen3 (Renesas R7F7012xx, RH850)
- 2.5 hybridA25A-FXSDenso Gen3 (Renesas R7F7012xx, RH850)
1998–2026
- 3.0 / 3.3 / 3.5 V6 (to 2020)1MZ-FE, 3MZ-FE, 2GR-FE, 2GR-FKSDenso pre-CAN engine ECU → Denso Gen1 (NEC 76F00xx) → Denso Gen2 (D76F01xx / 02xx); Denso Gen3 (Renesas R7F7012xx, RH850) on 2017–2020
- 2.5 hybrid (2021+)A25A-FXSDenso Gen3 (Renesas R7F7012xx, RH850)
2009–2015
- 2.7 4-cyl / 3.5 V61AR-FE, 2GR-FEDenso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
2007–2020
- 1.5 4-cyl1NZ-FEDenso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
1995–2004
- 2.4 / 2.7 4-cyl2RZ-FE, 3RZ-FEDenso pre-CAN engine ECU
- 3.4 V65VZ-FEDenso pre-CAN engine ECU
2005–2015
- 2.7 4-cyl2TR-FEDenso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
- 4.0 V61GR-FEDenso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
2016–2023
- 2.7 4-cyl2TR-FEDenso Gen2 (D76F01xx / 02xx)
- 3.5 V62GR-FKSDenso Gen2 (D76F01xx / 02xx); Denso Gen3 (Renesas R7F7012xx, RH850) on later builds
- 2.4 turbo / i-FORCE MAX hybridT24A-FTSDenso Gen3 (Renesas R7F7012xx, RH850)model code confirmed by label
2000–2006
- 3.4 V6 / 4.0 V65VZ-FE, 1GR-FEDenso pre-CAN engine ECU / Denso Gen1 (NEC 76F00xx)
- 4.7 V82UZ-FEDenso pre-CAN engine ECU / Denso Gen1 (NEC 76F00xx)
- 4.0 V6 / 4.6 V81GR-FE, 1UR-FEDenso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
- 4.7 / 5.7 V82UZ-FE, 3UR-FE, 3UR-FBEDenso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
- 3.4 twin-turbo V6 / i-FORCE MAX hybridV35A-FTSDenso Gen3 (Renesas R7F7012xx, RH850)
- 2.7 4-cyl / 3.4 V6 (to 2002)3RZ-FE, 5VZ-FEDenso pre-CAN engine ECU
- 4.0 V6 / 4.7 V8 (2003–2009)1GR-FE, 2UZ-FEDenso pre-CAN engine ECU / Denso Gen1 (NEC 76F00xx)
- 4.0 V61GR-FEDenso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
- 4.7 / 5.7 V8 (to 2021)2UZ-FE, 3UR-FEDenso pre-CAN engine ECU / Denso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
- 2.4 turbo hybrid (2024+)T24A-FTSDenso Gen3 (Renesas R7F7012xx, RH850)model code confirmed by label
1997–2026
- 3.0 / 3.3 / 3.5 V61MZ-FE, 3MZ-FE, 2GR-FE, 2GR-FKSDenso pre-CAN engine ECU → Denso Gen1 (NEC 76F00xx) → Denso Gen2 (D76F01xx / 02xx); Denso Gen3 (Renesas R7F7012xx, RH850) from 2019
- 2.5 hybrid (ES300h)2AR-FXE, A25A-FXSDenso Gen2 (D76F01xx / 02xx); Denso Gen3 (Renesas R7F7012xx, RH850) from 2019
1999–2026
- 3.0 / 3.3 / 3.5 V61MZ-FE, 3MZ-FE, 2GR-FE, 2GR-FKSDenso pre-CAN engine ECU → Denso Gen1 (NEC 76F00xx) → Denso Gen2 (D76F01xx / 02xx); Denso Gen3 (Renesas R7F7012xx, RH850) on 2020+
- 3.3 / 3.5 hybrid (RX400h / RX450h)3MZ-FE, 2GR-FXE, 2GR-FXSDenso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
2001–2026
- 2.5 / 3.0 / 3.5 V6, 2.0 turbo2JZ-GE, 4GR-FSE, 2GR-FSE, 8AR-FTSDenso pre-CAN engine ECU → Denso Gen1 (NEC 76F00xx) → Denso Gen2 (D76F01xx / 02xx)
- 5.0 V8 (IS F / RC F)2UR-GSEDenso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
1998–2020
- 3.0 / 3.5 V6, 4.3 / 4.6 V82JZ-GE, 2GR-FSE, 3UZ-FE, 1UR-FSEDenso pre-CAN engine ECU → Denso Gen1 (NEC 76F00xx) → Denso Gen2 (D76F01xx / 02xx)
- 3.5 hybrid (GS450h)2GR-FSE / 2GR-FXEDenso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
1998–2026
- 4.0 / 4.3 / 4.6 V81UZ-FE, 3UZ-FE, 1UR-FSEDenso pre-CAN engine ECU → Denso Gen1 (NEC 76F00xx) → Denso Gen2 (D76F01xx / 02xx)
- 3.5 twin-turbo V6 (2018+)V35A-FTSDenso Gen3 (Renesas R7F7012xx, RH850)
- 4.6 / 4.7 / 5.7 V81UR-FE, 2UZ-FE, 3UR-FEDenso pre-CAN engine ECU / Denso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
- 3.4 twin-turbo V6 (GX 550 / LX 600)V35A-FTSDenso Gen3 (Renesas R7F7012xx, RH850)
2015–2026
- 2.0 turbo (NX200t / NX300)8AR-FTSDenso Gen2 (D76F01xx / 02xx)
- 2.5 hybrid (NX300h)2AR-FXEDenso Gen2 (D76F01xx / 02xx)
- 2.4 turbo / 2.5 hybrid (2022+)T24A-FTS, A25A-FXSDenso Gen3 (Renesas R7F7012xx, RH850)
2005–2016
- 2.4 / 2.5 4-cyl2AZ-FE, 2AR-FEDenso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
- 1.5 4-cyl (first-gen xB)1NZ-FEDenso pre-CAN engine ECUmodel code confirmed by label
- 2.4 4-cyl (xB 2008–2015)2AZ-FEDenso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
- 1.8 4-cyl (xD)2ZR-FEDenso Gen1 (NEC 76F00xx) / Denso Gen2 (D76F01xx / 02xx)
By ECU part number
Corolla / Matrix engine ECU
Denso · 1998–2013
Corolla (E110 through E140) and the Matrix. 89661-02K13 (2005 1.8), 89661-02L82 (2010 Corolla / 2009 Matrix) are typical full numbers.
Corolla / Scion xB engine ECU
Denso · 2008–2020
Scion xB 2008–2015 (89661-12N11, 89661-12T90) and the 2019–2020 TNGA Corolla (89661-12Y41). Older Japan-built Corollas carried it too.
Corolla engine ECU (E170)
Denso · 2014–2019
The 2014–2019 Corolla sedan and iM — 89661-0ZR11 on 2017–2018 cars. Gen2 Denso, routine clone.
Corolla hybrid engine ECU (TNGA)
Denso · 2020–2026
Corolla hybrid from 04/2020 (89661-1AB10). Gen3 — confirmed by label before payment.
Corolla Cross engine ECU
Denso · 2022–2026
Corolla Cross, incl. the 2.0 hybrid (89661-0A660). Gen3 — confirmed by label.
Camry engine ECU
Denso · 1997–2026
Camry across every generation: 89661-06B10 (2005 V6), 06G14 (2007–2009), 06K84 (2012–2014), 06N10 (2015), 06X91 (2018–2020 3.5). The most common Toyota ECU we see.
Camry / Lexus ES engine ECU
Denso · 1997–2026
The Camry/ES platform numbering: Lexus ES350 (89661-33E70 2008–2009, 33M71 2013–2015) and some 2018+ Camrys (89661-33T40).
Camry engine ECU (2002–2006)
Denso · 2002–2006
XV30 Camry 2.4 and 3.0/3.3 — 89661-0X043 on 2003–2004 cars. Also seen with 89661-06.
Avalon engine ECU
Denso · 2000–2022
Avalon: 89661-07241 (1999 1MZ-FE), 89661-07373 / 07340 (2003 1MZ-FE), 89661-07411 / 07450 / 07451 (2005–2006 2GR-FE), 89661-07470 / 07480 (2007–2008). Later Avalons may carry Camry 89661-06 / 89661-33 numbers — confirm by label.
Prius engine ECU
Denso · 2004–2026
Prius: 89661-47102 / 47071 (2004–2006), 89661-47A00 (2018–2020, incl. AWD-e). The hybrid vehicle control ECU is a separate 89981 part.
Venza engine ECU
Denso · 2009–2015
First-generation Venza 2.7 and 3.5 (89661-0T053, 89661-0T081 AWD).
RAV4 engine ECU
Denso · 2001–2020
RAV4 through the XA40: 89661-42Q34 (2009–2011), 42K50 (2013–2014 2.5), 42Z20 (2019–2020 2.5).
RAV4 engine ECU (TNGA)
Denso · 2019–2026
Fifth-generation RAV4 — 89661-0RA00 / 0RA41 on 2020 cars. Gen3 — confirmed by label.
Highlander engine ECU
Denso · 2008–2026
Highlander from the XU40: 89661-0E321 (2008–2010), 0E610 (2016), 0EQ31. 2020+ units are Gen3.
Highlander / Lexus RX engine ECU
Denso · 1999–2026
The Highlander/RX platform: 89661-48B70 (2008–2010 Highlander 3.5), 89661-48602 and 48C70 (RX350).
Sienna engine ECU
Denso · 1998–2026
Sienna: 89661-08120 (2005 3.3), 89661-08440 (2016–2018 3.5). 2021+ hybrids carry Gen3 units.
Tacoma engine ECU (2005+)
Denso · 2005–2026
Second- and third-generation Tacoma: 89661-04A30 (2005 4.0), 04D33 (2007–2009), 04D01 (2010–2011), 04J31 (2015–2016), 04M00 (2020–2023).
4Runner / FJ Cruiser / 1995–2004 Tacoma engine ECU
Denso · 1995–2026
4Runner (89661-35M72 on 2015–2016 4.0) and, by trade usage, the FJ Cruiser and the first-generation Tacoma. 4Runner stayed on the Gen2 unit for most of its run.
Tundra / Sequoia engine ECU
Denso · 2000–2026
Tundra and Sequoia: 89661-0C331 (2001–2002), 0C730 (2005–2006), 0C853 (2007 5.7), 0CG43 (2010 tow), 0CM70 (2011–2013), 0CP13 / 0CP45 (2014–2018 tow). Tow-package trucks carry their own number.
Land Cruiser / Lexus LX / GX engine ECU
Denso · 1998–2026
Land Cruiser (89661-60A02 2004, 60R10 2013), Lexus LX570 (89661-60Y31 2015–2019), Lexus GX460 (89661-60K40 / 60W10 2013, 60U20 / 60U21 2016–2019).
Yaris / Scion xD engine ECU
Denso · 2007–2020
Yaris: 89661-52B41 (2007), 89661-52G52 (2007–2008), 89661-52R71 (2012–2014). Scion xD by trade usage.
Scion tC engine ECU
Denso · 2005–2016
Scion tC: 89661-21460 (2005–2006), 89661-21520 (2008–2010).
Lexus IS engine ECU
Denso · 2001–2026
Lexus IS: 89661-53N50 (IS250), 89661-53V12 (IS350). The GS and RC share some numbers — label decides.
Lexus GS engine ECU
Denso · 1998–2020
Lexus GS, incl. the GS450h (89661-30G61).
Lexus LS engine ECU
Denso · 1998–2026
Lexus LS: 89661-50P12 (LS460 RWD to 09/2015).
Lexus NX engine ECU
Denso · 2015–2026
Lexus NX200t / NX300: 89661-78054, 89661-78610 (2017). 2022+ NX is Gen3.
Clone it — $350 flat
Mail your original ECU and a donor with the same full part number. We copy the original's VIN, immobilizer data, coding and adaptations onto the donor, typically within 24 hours of arrival, so it installs with the factory immobilizer intact. Every family on this page, one price. Immobilizer stays on; no emissions edits.
Toyota / Lexus / Scion engine ECU clone serviceAdapt it on the car — remote Techstream, $250
Some cars still want an on-car step after a module swap — an ECU communication ID registration on a smart-key car, a calibration update, or a key registration. Plug a J2534 pass-thru interface into the car and we run the factory Techstream software on it from our bench — no dealer visit. The same session covers programming after any other Toyota or Lexus module replacement.
Book the Toyota / Lexus remote sessionHow to read a Toyota ECU label
Toyota part numbers are a five-digit part type, a hyphen, and a five-character suffix. 89661 is "computer, engine control" (89666 and 89660 appear on some hybrids and newer cars). The first two characters of the suffix are the model code — 06 for Camry, 04 for the 2005-and-later Tacoma, 0C for Tundra and Sequoia, 35 for 4Runner, 42 and 0R for RAV4, 48 for Highlander and the Lexus RX — and the last three pick the exact engine, drivetrain, market, tow package and revision. This lookup matches on the model code.
The same label carries the Denso number (a 10-digit number starting 275 or 1758) and, on the controller itself, the processor generation that decides whether the unit is a routine bench clone: NEC 76F00xx (Gen1, roughly 2005–2009), D76F01xx or 02xx (Gen2, roughly 2010–2017) or Renesas R7F7012xx (Gen3, roughly 2018 on). Either number is enough for us to identify the module from a photo.
Two trucks of the same year and engine can carry two different ECM numbers — a tow-package Tundra has its own — and a Camry can carry a 89661-06 or a 89661-33 number depending on the plant and the year. The label beats the model year every time; when the lookup shows more than one code for your engine, that is why.
Every Toyota / Lexus / Scion model generation
Corolla / Matrix
E110 / E120 / E130 (NUMMI + Cambridge) · 1998–2008
2 engines · 1 ECU model codes
Corolla / Matrix
E140 · 2009–2013
2 engines · 1 ECU model codes
Corolla / Corolla iM
E170 · 2014–2019
1 engine · 2 ECU model codes
Corolla / Corolla Cross
TNGA (E210) + Corolla Cross · 2020–2026
2 engines · 3 ECU model codes
Camry / Solara
XV20 / XV30 · 1997–2006
2 engines · 3 ECU model codes
Camry / Camry Hybrid
XV40 / XV50 · 2007–2017
3 engines · 2 ECU model codes
Camry
XV70 / XV80 (TNGA) · 2018–2026
3 engines · 2 ECU model codes
Avalon
XX20 / XX30 / XX40 / XX50 · 2000–2022
2 engines · 1 ECU model codes
Prius / Prius c / Prius v / Prius Prime
XW10 through XW60 · 2001–2026
1 engine · 1 ECU model codes
RAV4
XA20 / XA30 / XA40 · 2001–2018
2 engines · 1 ECU model codes
RAV4 / RAV4 Hybrid / Prime
XA50 (TNGA) · 2019–2026
2 engines · 2 ECU model codes
Highlander / Highlander Hybrid
XU20 / XU40 / XU50 · 2001–2019
3 engines · 2 ECU model codes
Highlander / Grand Highlander
XU70 (TNGA) · 2020–2026
2 engines · 1 ECU model codes
Sienna
XL10 through XL40 · 1998–2026
2 engines · 1 ECU model codes
Venza
AV10 · 2009–2015
1 engine · 1 ECU model codes
Yaris
XP90 / XP130 · 2007–2020
1 engine · 1 ECU model codes
Tacoma
First generation · 1995–2004
2 engines · 1 ECU model codes
Tacoma
Second generation · 2005–2015
2 engines · 1 ECU model codes
Tacoma
Third generation · 2016–2023
2 engines · 1 ECU model codes
Tacoma
Fourth generation (TNGA-F) · 2024–2026
1 engine · 0 ECU model codes
Tundra
First generation · 2000–2006
2 engines · 1 ECU model codes
Tundra / Sequoia
Second generation · 2007–2021
2 engines · 1 ECU model codes
Tundra / Sequoia
Third generation (TNGA-F) · 2022–2026
1 engine · 1 ECU model codes
4Runner
Third and fourth generation · 1996–2009
2 engines · 1 ECU model codes
4Runner / FJ Cruiser
Fifth-gen 4Runner (2010–2024) + FJ Cruiser (2007–2014) · 2007–2024
1 engine · 1 ECU model codes
Land Cruiser
100 / 200 / 250 series · 1998–2026
2 engines · 1 ECU model codes
Lexus ES
XV20 through XV70 · 1997–2026
2 engines · 1 ECU model codes
Lexus RX
XU10 through AL30 · 1999–2026
2 engines · 1 ECU model codes
Lexus IS / RC
XE10 through XE30 · 2001–2026
2 engines · 1 ECU model codes
Lexus GS
S160 / S190 / L10 · 1998–2020
2 engines · 1 ECU model codes
Lexus LS
XF30 / XF40 / XF50 · 1998–2026
2 engines · 1 ECU model codes
Lexus GX / LX
GX 470 / 460 / 550; LX 470 / 570 / 600 · 1998–2026
2 engines · 1 ECU model codes
Lexus NX
AZ10 / AZ20 · 2015–2026
3 engines · 1 ECU model codes
Scion tC
AT10 / AT20 · 2005–2016
1 engine · 1 ECU model codes
Scion xB / xD
xB (2004–2015), xD (2008–2014) · 2004–2015
3 engines · 2 ECU model codes
Every ECU part-number family
Frequently asked questions
Where is the part number on a Toyota engine ECU?
On the label of the module itself, printed as 89661-XXYYY next to the Denso number. On most Toyotas the ECM is behind the glovebox or on the passenger-side kick panel; on trucks and many Lexus models it is in the engine bay in a plastic box near the battery or firewall. You can usually read the label without unplugging anything.
Does the donor ECM have to match the whole part number?
Yes — the full 89661-XXYYY number. The model code (what this lookup matches) tells you the family; the last three characters select the engine, transmission, market, tow package and revision. A clone copies your original’s data onto a donor; it cannot bridge a calibration mismatch, so we check both numbers by VIN before you buy.
My model code is not in the list. Can you still clone it?
Very likely. The catalog lists the common US codes, not every number Toyota printed in thirty years. Text us a photo of the label with the VIN and we tell you the family and whether it is a routine bench clone, usually within minutes.
What does “confirmed by label first” mean on the newest cars?
Toyotas from about 2018 — TNGA Camry, RAV4, Corolla, Highlander, the newest trucks — run the Denso Gen3 controller on a Renesas RH850 processor. Those units read on the bench with current tooling, but we confirm the exact unit from your label before you pay rather than promise a clone on a number we have not seen.
Does the clone carry the immobilizer and my keys?
Yes. On turn-key Toyotas the key data lives in the ECM, so the cloned donor accepts your existing keys. On smart-key cars the ECM is paired with the certification ECU and ID code box; the clone carries that pairing across. If a car still wants an on-car registration afterwards, the remote Techstream session over J2534 does it for $250 — no dealer visit.