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 

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).

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 Pre-Facelift MX5 NB (MY1998-2000, 3 Plug ECU, non-VVT 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 7 bar MAP sensor 
• Most factory features are supported 
• Check the features tab for I/O expansion options

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 
Pin 1                An Temp 4
Pin 2                An Temp 3
Pin 3                DI 10
Pin 4                DI 9 
Pin 5                DI 8 
Pin 6                DI 7
Pin 7                IGN 4
Pin 8                IGN 3

E-Throttle Connector 
Pin 1                Ground (signal)
Pin 2                +5V out
Pin 3                An Volt 12
Pin 4                An Volt 11
Pin 5                An Volt 10
Pin 6                An Volt 9
Pin 7                Aux 10
Pin 8                Aux 9

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 Facelift MX5 NB (MY2001-2005, VVT Naturally Aspirated Engines and non-VVT Mazdaspeed Turbo 1.8L)
 

• Please check your connector matches the header in the listed photo before purchasing.  
• This ECU works for manual transmissions only.  
• Includes onboard 7 bar MAP sensor 
• Most factory features are supported 
• Check the features tab for I/O expansion options

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 
Pin 1                Ground (signal)
Pin 2                +14 out
Pin 3                An Temp 4
Pin 4                An Temp 3
Pin 5                DI10
Pin 6                DI9
Pin 7                IGN3
Pin 8                IGN4

E-Throttle Connector 
Pin 1                Ground (signal)
Pin 2                +5V out
Pin 3                An Volt 12
Pin 4                An Volt 11
Pin 5                An Volt 10
Pin 6                An Volt 9
Pin 7                Aux 10
Pin 8                Aux 9

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: 
Gnd                Sensor Ground Only  
+5V Out        Supply for MAP sensor 
An Volt 5        Analog 0-5V input 
An Volt 6        Analog 0-5V input 
DI 6                Digital Input

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 
Gnd                Sensor Ground Only  
+5V Out        Low Current +5V Supply 
DI8                Digital Input 
DI7                Digital Input 
An Volt 5        Analog 0-5V input 
An Volt 6        Analog 0-5V input 
An Volt 7        Analog 0-5V input 
An Temp 4        Temperature sensor input 

Expansion Connector 2 
Ign 8                Ignition 8 Auxiliary Output 
Ign 7                Ignition 7 Auxiliary Output 
Ign 6                Ignition 6 Auxiliary Output 
Ign 5                Ignition 5 Auxiliary Output 
An Volt 9        Analog 0-5V input 
An Volt 8        Analog 0-5V input 
DI10                Digital Input 
DI9                Digital Input