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Easy to install. Affordable. Reliable.  
G4X PlugIn ECUs offer the latest in engine management technology, designed to easily maximize the potential from your car.  
This ECU fits inside the factory OEM enclosure. Installation is a breeze, with no alteration of the factory wiring loom required for the models listed below. 

Designed for the MX5 B6ZE(RS) / BP 1.8L engine. 

  • Please check your connector matches the header in the listed photo before purchasing.  
  • This ECU works for manual transmissions only.  
  • Includes onboard 4 bar or 7 bar MAP sensor 
  • Knock control not available on this ECU. 
  • Most factory features are supported. 
  • Check the features tab for I/O expansion options.
  • This ECU will need a modification before E-Throttle is usable.

Suitable applications:  

1600 1989-1997 NA MX5 

1800 1989-1997 NA MX5 

1800 323 GTX 

1800 323 GTR 

Please note: This ECU does not fit NB, NC, ND models. This unit is only suitable for the 2 plug ECU and not the later 3 plug models). 


MTS - Link G4X Case Enclosure sold separately 

MX5Link - MX5NAX Link G4X pnp ECU

$1,843.00 Regular Price
$1,707.00Sale Price
  • G4X PlugIn Key Features (where applicable):
    Up to 6D fuel and ignition mapping
    Precision closed loop cam control (four cam, independent control)
    Sequential fuel delivery
    Digital triggering, all OEM patterns
    OEM idle hardware supported
    5D boost control with three switchable tables
    Motorsport features - antilag, launch, flat shift
    Continuous barometric correction (on board)
    CAN port
    QuickTune - automated fuel tuning
    Individual cylinder correction
    USB tuning cable included
    Stats recording into on-board memory
    Gear compensations for spark, boost and fuel
    Real time selectable dual fuel, ignition and boost maps
    Sync and crank sensors can be a combination of Hall effect, variable reluctance or optical
    Boost control referenced to gear, speed or throttle position
    512 mega bytes data logging memory
    Staged injection
    Knock with "windowing"

    I/O Expansion Options:
    The following expansion connector inputs/outputs are provided: 
    Expansion Connector 1 
    SGnd                Sensor Ground Only  
    +5V                Low Current +5V Supply 
    DI 7                Digital Input 
    DI 6                Digital Input 
    Volt 5                Analog 0-5V input 
    Volt 6                Analog 0-5V input 
    Temp4                Temperature sensor input 
    Temp3                Temperature sensor input 

    Expansion connector 2 
    SGnd                Sensor Ground Only  
    +5V                Low Current +5V Supply 
    Ign 7                Auxiliary Output 
    Ign 8                Auxiliary Output 
    DI 8                Digital Input 
    DI 9                Digital Input 
    Volt 9                Analog 0-5V input 
    Volt 10                Analog 0-5V input 

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