39112-2B125 73G – Hyundai i30 engine ECU IMMO OFF Plug & Play
Hyundai engine ECU 39112-2B125 marked 73G / 9001090131KC is an original control module used in selected Hyundai i30 models. The offered ECU has been professionally prepared in IMMO OFF version, allowing true Plug & Play installation without immobilizer programming.
The module is fully tested, checked before shipment and supplied with warranty. This solution is commonly chosen for vehicles with damaged engine ECU, immobilizer faults or communication problems with the original controller.
Possible application of engine ECU 39112-2B125
The 39112-2B125 ECU was installed in selected Hyundai i30 petrol models. Compatibility must always be confirmed using the original ECU part number.
- Hyundai i30
- Hyundai i30 FD
- model years approximately 2007–2012
- selected 1.4 / 1.6 petrol engines
Main features
- prepared as IMMO OFF version,
- true Plug & Play installation,
- no immobilizer coding required,
- tested before sale,
- warranty included,
- original Hyundai / Kia ECU.
Typical faults of Hyundai 39112-2B125 ECU
- engine does not start,
- no communication with ECU via diagnostics,
- vehicle starts and stalls after a few seconds,
- immobilizer related errors,
- fuel injection or engine running problems,
- no control of ignition coils or injectors,
- random engine shutdowns,
- electrical faults after short circuit or discharged battery.
Why choose IMMO OFF version?
The IMMO OFF Plug & Play version allows the vehicle to start without immobilizer adaptation or key programming. This solution is often used when the original ECU is damaged or when Hyundai i30 immobilizer synchronization problems occur.
FAQ – Hyundai i30 engine ECU 39112-2B125 IMMO OFF
Does ECU 39112-2B125 work as Plug & Play?
Yes, the offered 39112-2B125 ECU has been prepared as IMMO OFF Plug & Play, so immobilizer coding is not required after installation.
Which Hyundai i30 models use ECU 391122B125?
The 391122B125 engine ECU is used in selected Hyundai i30 FD petrol models. Matching the original part number is the most important requirement.
What are the symptoms of faulty Hyundai 39112-2B125 73G ECU?
A defective ECU may cause no start condition, lack of diagnostic communication, immobilizer errors, unstable engine operation or random stalling.
Does Hyundai i30 ECU 9001090131KC require programming?
No. The offered 9001090131KC module is prepared as IMMO OFF, so in most cases it can be installed without key programming.
Is ECU 39112-2B125 tested before shipping?
Yes, every 39112-2B125 engine ECU is individually tested and verified before sale.
Can Hyundai i30 73G ECU be matched only by appearance?
No. The ECU should always be selected using the exact part number, especially 39112-2B125 and marking 73G. Housing appearance alone does not guarantee compatibility.
Does IMMO OFF solve immobilizer problems in Hyundai i30?
Yes, the IMMO OFF version bypasses immobilizer related issues caused by damaged ECU or synchronization problems between the key and control unit.
See also the other items in the Hyundai Engine Control Units (ECUs) category.
