Julie GPEC4 Custom | IMMO OFF Emulator
Features
- Supported ECU Transmission CAN
- Built-in Memory 24C02 (EEPROM)
Julie™ GPEC4 Custom
Immo Off Emulator for GPEC4 and GPECLM ECUs. From a Fiat 500X to a Jeep Wrangler 4xe.
Julie™ GPEC4 Custom is an emulator from CarLabImmo that replaces the immobiliser signal in Continental and Mopar GPEC4 and GPECLM ECUs. It works with Abarth, Alfa Romeo, Fiat, Jeep and Ram vehicles listed below. Use it when the original ECU is damaged and you replace it with another unit, or in a custom project such as a boat engine, motorsport or racing build.
How it works
Step 1
Find your ECU
Check the ECU number on the label. Pick your car brand below, or search this page for the number.
ℹ️ The ECU numbers listed are tested. Other numbers of the same ECU type may work too. To confirm, create a free ticket on our forum.
Step 2
Install Julie
Follow the manual for your ECU type. It is always up to date. Videos give a quick overview of the job.
Step 3
Immo Off with Julie
Julie gives the ECU the immobiliser signal it expects, enabling car start.
Built to last, down to the PCB
The board inside Julie™ is made for life in a car, not on a shelf.
Automotive MCU
Improved performance and stability, even in harsh weather conditions.
Gold-plated solder pads
Gold resists oxidation, so Julie™ keeps working for decades.
Externally programmable EEPROM
Program selection and values are written to the 24C02 EEPROM on board. With the 24C02 EEPROM Memory Adapter for Julie™ Emulator, you no longer need to solder jumpers or unsolder the EEPROM.
Find by car brand
Find your car brand, then click the ECU type to jump to its details.
| Brand | ECU Manufacturer | ECU Type | ECU Numbers | Example cars |
|---|---|---|---|---|
| Abarth | Continental / Mopar | GPEC4 / GPECLM | — |
|
| Alfa Romeo | Continental / Mopar | GPEC4 / GPECLM | — |
|
| Fiat | Continental / Mopar | GPEC4 / GPECLM | — |
|
| Jeep | Continental / Mopar | GPEC4 / GPECLM | — |
|
| Ram | Continental / Mopar | GPEC4 / GPECLM | — |
|
Supported ECUs
Grouped by ECU manufacturer. Always install Julie following the manual for your ECU type. It has the current procedure.
Continental / Mopar ECUs
Continental and Mopar GPEC4 / GPECLM ECUs (Continental GPEC4, Continental GPECLM, Mopar GPEC4, Mopar GPECLM)
ℹ️ Use Julie™ when you replace a damaged ECU with another unit. All other components (key, BSI module, etc.) must remain the original ones in the vehicle.
ℹ️ Julie™ can also be used in a custom project, such as boat engines, motorsport or racing applications.
ℹ️ Tested on: GPEC4 P068292196AD T00EP0279GUPGM (Jeep Wrangler 2.0T 4xe Plug-in-Hybrid 272HP / 380HP 2019).
Supported cars
- Abarth 500 1.3T FireFly 150HP 2020-2022
- Alfa Romeo Tonale 1.3T MultiAir 280HP 2022-2025
- Alfa Romeo Tonale 1.5T FireFly 130HP 2022-2024
- Alfa Romeo Tonale 1.5T FireFly 160HP 2022-2025
- Fiat 500X 1.0T FireFly 120HP 2020-
- Jeep Cherokee (KL) 2.0T GME 272HP 2019-2023
- Jeep Grand Cherokee (WK2) 3.6 V6 Pentastar 290HP 2017-2018
- Jeep Renegade 1.0 GSE 120HP 2018-2022
- Jeep Renegade 1.3 GSE 180HP 2018-2020
- Jeep Wrangler 2.0T 4xe Plug-in-Hybrid 272HP / 380HP 2018-2026
- Ram Truck Rampage 2.0 GME Hurricane 4 Turbo 272HP 2023-
ℹ️ This video is for reference only. Always check the manual first.
Manual and full ECU list
Emulator Installation steps for every supported ECU type, plus the full ECU list.
Open the manual
Didn't find your ECU?
Check Immo Bypass, our database of software immo off solutions and original ECU files.
Check your ECU in Immo Bypass⚠️ Disclaimer
The products offered by CarLabImmo Sp. z o.o. are professional automotive diagnostic, repair and programming tools, intended exclusively for use by qualified automotive professionals — including licensed locksmiths, vehicle repair workshops and ECU/immobilizer repair specialists. By purchasing, the buyer confirms that they are a professional user and agrees to use the product in full compliance with all applicable local, national and international laws. Any use of these products for unauthorized vehicle access or any other unlawful purpose is strictly prohibited and is the sole responsibility of the buyer. CarLabImmo does not condone and accepts no liability for any misuse of its products.
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