S-Series Plug n Play Kits

Haltech Nexus S2 and S3 plug and play kits pair an S-Series ECU with a vehicle specific adapter harness, so full standalone engine management goes in without cutting or splicing a single factory wire. Every kit on this page is matched to a chassis and its factory connectors, and every one of them is reversible if the car ever needs to go back to stock.

The S-Series is the direct successor to the Elite 1500 and 2500. It keeps the two connector Elite layout and the wiring you already know, then adds the Nexus generation processor, faster logging, and the current Haltech NSP software. If you were shopping an Elite 1500, the Nexus S2 is its replacement. If you were shopping an Elite 2500, the Nexus S3 is where you land.

Coverage runs to more than 330 kits across over 150 chassis. Toyota is the deepest section, with the Supra JZA80, Chaser and Soarer, MR2, Celica, Corolla, 86 and BRZ, and Land Cruiser. From there it is Nissan Silvia, 240SX, Skyline, 300ZX and Z cars, Subaru WRX and STI, Mitsubishi Evo II through IX, Mazda RX-7 and Miata, and Honda and Acura from the OBD-I Civic and Integra through the S2000, RSX, TSX and 2012-2015 Civic. Ford, Chevrolet, BMW, Audi, Lexus, Hyundai, Kia, Lotus, Porsche, Dodge and Jeep fitments fill in the rest, including immobilizer specific versions where the factory ECU needs one.

Picking between the S2 and the S3 comes down to cylinder count, ignition setup, and how many inputs and outputs your build actually needs. Send us the engine and the goal and we will spec it. Every ECU here ships free in the lower 48, arrives with a Haltech basemap, and can be tuned remotely by us once it is installed and running.