Haltech - Mazda Rx8 K20/K24 Swap Rx8 Engine Harness (TBS-00184)

In an effort to make the best possible product for you the customer, VERSION 3 is now under construction.

We re-engineer the factory Honda K series engine harness to run a 2004-2008 Mazda RX-8 on a Haltech Nexus S2 or Nexus S3 engine management system. Your TSX harness and your RX-8 engine harness come to us, and they leave as one purpose-built swap harness: repinned to the Nexus, integrated with the RX-8 body side, and finished to a standard you can actually service. One harness, one ECU, one car that drives like it was built that way.

What You'll Feel

• A K series that fires and idles on a Haltech base map instead of weeks of pin chasing
• Factory RX-8 chassis functions kept: fuel pump, fans, brake and clutch switches, reverse lights
• Drive-by-wire that just works, with the pedal and throttle body both landing where the Nexus expects them
• Onboard wideband and 4 bar MAP built into the ECU, so fewer boxes to mount and wire
• A clean, retaped, loomed harness with repaired factory weak points, not a splice job

Features

• Factory K20/K24 engine harness repinned to the Haltech Nexus S2 or Nexus S3
• Nexus S2: successor to the Elite 1500, built for up to 4 cylinders, 4 injector and 4 ignition outputs, onboard wideband controller (NTK and LSU4.9), onboard 4 bar MAP, dual CAN, USB-C tuning
• Nexus S3: successor to the Elite 2500, up to 8 cylinders, 8 injector and 8 ignition outputs, the same onboard wideband and MAP, plus the extra I/O headroom for bigger builds and more sensors
• Mazda RX-8 chassis integration jumper included and wired in
• Haltech CAN cable and Haltech plug and pin kit included
• Drive-by-wire extension, air temp sensor extension, and reverse light harness extension
• Full retape, loom, and repair of modified or damaged locations
• Optional extra modifications for additional sensors or functions, connector kit included in that price

The Details

We build this harness around the 2005-2006 Acura TSX engine harness with charge harness, manual or automatic. It gives the longest termination run of any K20/K24 configuration, which is what lets the harness reach the ECU location cleanly in an RX-8 without extensions everywhere. Standardizing on one donor harness also means faster turnaround, because we are not re-solving the layout on every job.

The TSX charge harness is separated and retained so the K series alternator keeps its factory control functions. The RX-8 charge harness handles the starter and alternator posts along with starter solenoid activation. The RX-8 chassis jumper bridges the Nexus to the Series 1 body side so the car still behaves like a street car after the swap.

Choosing between the S2 and the S3: the S2 is the direct fit for a naturally aspirated or turbo K20/K24 and covers everything a four cylinder needs, including VTEC, VTC, drive-by-wire, and boost control. Step up to the S3 if you want the additional inputs and outputs for extensive sensor packages, staged nitrous, or future-proofing the build. Both run Haltech NSP software and both are supported by our remote tuning sessions.

Service Includes

1x Factory K20/K24 engine harness repinned to Haltech Nexus S2 or Nexus S3
1x Mazda RX-8 Series 1 chassis integration jumper
1x Haltech CAN cable
1x Haltech plug and pin kit
1x Drive-by-wire extension
1x Air temp sensor extension
1x Reverse light harness extension
Retape, loom, and repair of modified locations

What We Need From You

• 2005-2006 Acura TSX engine harness with charge harness, manual or automatic
• Mazda RX-8 engine harness
• Both harnesses shipped to Tuned By Shawn
• Your ECU choice: Nexus S2 or Nexus S3

Applications

2004 Mazda RX-8
2005 Mazda RX-8
2006 Mazda RX-8
2007 Mazda RX-8
2008 Mazda RX-8
Chassis: Series 1
Engine: Honda K20 / K24
ECU: Haltech Nexus S2 / Nexus S3