Looking for anything in particular?
Cart
0
Apply Promo Code
Subtotal
$0.00 USD
Order total:
$0.00 USD
Note:
Displayed Shipping Cost is estimate here. Final costs will be calculated at Checkout for actual Shipping Address.
Displayed Shipping Cost is estimate here. Final costs will be calculated at Checkout for actual Shipping Address.
Haltech Usage Policy:
In many states, it is unlawful to tamper with your vehicle's emissions equipment. Haltech products are designed and sold for sanctioned off-road/competition non-emissions controlled vehicles only and may never be used on a public road or highway. Using Haltech products for street/road use on public roads or highways is prohibited by law unless a specific regulatory exemption exists (more information can be found on the SEMA Action Network website www.semasan.com/emissions for state by state details in the USA). It is the responsibility of the installer and/or user of this product to ensure compliance with all applicable local and federal laws and regulations. Please check with your local vehicle authority before purchasing, using or installing any Haltech product.
In many states, it is unlawful to tamper with your vehicle's emissions equipment. Haltech products are designed and sold for sanctioned off-road/competition non-emissions controlled vehicles only and may never be used on a public road or highway. Using Haltech products for street/road use on public roads or highways is prohibited by law unless a specific regulatory exemption exists (more information can be found on the SEMA Action Network website www.semasan.com/emissions for state by state details in the USA). It is the responsibility of the installer and/or user of this product to ensure compliance with all applicable local and federal laws and regulations. Please check with your local vehicle authority before purchasing, using or installing any Haltech product.
IMPORTANT EMISSIONS NOTICE:
In many states, it is unlawful to tamper with your vehicle's emissions equipment. Haltech products are designed and sold for sanctioned off-road/competition non-emissions controlled vehicles only and may never be used on a public road or highway. Using Haltech products for street/road use on public roads or highways is prohibited by law unless a specific regulatory exemption exists (more information can be found on the SEMA Action Network website www.semasan.com/emissions for state by state details in the USA). It is the responsibility of the installer and/or user of this product to ensure compliance with all applicable local and federal laws and regulations. Please check with your local vehicle authority before purchasing, using or installing any Haltech product.
In many states, it is unlawful to tamper with your vehicle's emissions equipment. Haltech products are designed and sold for sanctioned off-road/competition non-emissions controlled vehicles only and may never be used on a public road or highway. Using Haltech products for street/road use on public roads or highways is prohibited by law unless a specific regulatory exemption exists (more information can be found on the SEMA Action Network website www.semasan.com/emissions for state by state details in the USA). It is the responsibility of the installer and/or user of this product to ensure compliance with all applicable local and federal laws and regulations. Please check with your local vehicle authority before purchasing, using or installing any Haltech product.
Overview
PRE-SALE ITEM - ESTIMATED SHIPPING MID September 2025
The Haltech Nexus Mazda RX-8 Plug-in, as the name suggests, plugs directly into the Mazda harness, and nestles neatly into factory location.
It seamlessly supports vital OEM functions.
Unlock enhanced capabilities with "OEM Plus" functionality via the auxiliary connector, enabling features such as O2 Control, Flex Fuel, Oil Pressure monitoring, Fuel Pressure sensing.
And for serious drivers, the Nexus ECU unleashes potent Race Functionality, including CO2 Boost Control, Race Timer, Advanced Torque Management, Launch Control, Nitrous Control, and 128MB of onboard data logging.
Setting up your Mazda has never been easier, thanks to the intuitive setup wizard in NSP software or the Haltech Connect App on your smartphone. Plus, Wi-Fi capability ensures effortless diagnostics and tuning on the go.
Nexus Plug-in ECU includes
- Nexus Plug-in Mazda RX-8 ECU
- Air temperature + Wideband expansion harness 2.5m (8')
- Air temperature sensor (1/8' NPT)
- Aluminium bung for air temperature sensor
- Mounting brackets and hardware to suit
- 3mm Vacuum hose 2.5m (8')
- 3mm Aluminium Vacuum T piece
- Haltech USB-C cable
- Quick start guide
LSU4.9 Wideband hardware pack
- Includes sensor, weld in bung and 1.2M / 47" harness plug and play with Nexus Series harnesses
Features
NEXUS PLUG-IN ECU FEATURES
- Drive By Wire Throttle Support
- Single Channel Onboard Wideband Control - Supports LSU4.9/NTK
- Wi-Fi
- 4 channel onboard oscilloscope
- Data logging 128MB
- Flex Fuel
- Closed Loop O2 Control
- Knock Control
- Long term learning
AUXILIARY CONNECTOR
- 4 X Digital Pulsed Outputs
- 4 X Synchronised Pulsed Inputs
- 1 X Onboard Wideband
- 2 X Sensor Ground
- 2 x 12V Output
- 2 x 5V Output
SUPPORTED OEM FUNCTIONALITY:
- Drive-By-Wire / Electronic throttle
- Alternator control
- Cruise control switch
- Oil Metering Pump (OMP)
- Secondary Shutter Valve (SSV) solenoid
- Variable Dynamic Intake (VDI) solenoid
- Variable Fresh Air Duct (VFAD) solenoid
- Auxiliary Port Valves (APV) motor
- Electronic Power Steering
- DSC / Traction control
- Instrument cluster
- Rear O2 sensor (used as narrowband)
- ABS module (Note: Limited support. Currently we support the AUDM, JDM, USDM, and two different European versions of the ABS module. Other modules will have different CAN addressing.) ABS modules using K-line (instead of CAN) is not supported.
- Immobiliser light on dash (Note: We don't support the immobiliser, but the Haltech Plug-in ECU will still function and run the car regardless of the factory immobiliser and can prevent the immobiliser warning light from turning ON when the factory ECU is replaced.)
Share this product
HT-231402
Nexus Plug-in ECU - Mazda RX-8 + LSU4.9 Wideband Hardware Pack
Back Order
$1875.00 USD
(excl tax)
Add to cart
Suits: Mazda RX-8 Series 1 2003-2008, 13B-MSP Renesis 6-port (ADM, USDM, JDM, EUDM) Mazda RX-8 Series 1 2003-2008, 13B 4-port (JDM)
Includes: Nexus Plug-in ECU, Air temperature + Wideband expansion harness 2.5m (8'), Air temperature sensor (1/8 NPT), Mounting hardware, vacuum hose, T-piece, USB cable, LSU 4.9 Sensor, harness and bung, Quick Start Guide.
Notes: Supports Manual Transmissions Only - Factory manual - 5 speed on 4-port, 6 speed on 6-port
SAFE & SECURE SHOPPING