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Haltech Nexus S3 ECUs with Plug-and-Play Harness

Not Yet Reviewed

The Nexus S3 ECU is the successor to the acclaimed Elite 2500, offering a serious upgrade in performance and functionality. With advanced features, user-friendly in

The Nexus S3 ECU is the successor to the acclaimed Elite 2500, offering a serious upgrade in performance and functionality. With advanced features, user-friendly interface, and seamless connectivity, the S3 redefines the standard for engine management systems in the automotive industry. Haltech offers several ways to connect your S3 ECU.

If you are using a factory harness and are after an easy ECU upgrade, Haltech Nexus S3 ECUs with a plug-and-play adapter harness are excellent choices. They plug directly into the ECU and have a set of factory connectors on the other side which plug straight into the factory harness, allowing you to be up and running in just a few hours. The included quick-start guide will walk you through installation of the adapter harness into your vehicle. Select the Haltech S3 ECU and harness kit designed for your vehicle.

Kits include:

* Nexus S3 ECU
* Injection molded plastic plug-and-play adaptor harness
* M14 x 1.5 air temp sensor with matching plug and pins
* Auxiliary I/O 16-pin Tyco plug and pins

All the results found for this search are Not In Stock.

Results 1 - 25 of 26

Haltech Nexus S3 ECUs with Plug-and-Play Harness for 2006-2010 IMPREZA - HT-213311

Engine Management Systems, Nexus S3, ECU with Plug'n'Play Harness, Subaru WRX, Kit

Part Number: HTH-HT-213311

Not Yet Reviewed

Estimated Ship Date: Tomorrow if ordered today

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Estimated Ship Date: Tomorrow if ordered today

Haltech Nexus S3 ECUs with Plug-and-Play Harness for 1995-1997 LAND CRUISER - HT-213323

Engine Management Systems, Nexus S3, ECU with Plug'n'Play Harness, Toyota, Land Cruiser 80 Series, 1FZ-FE, Kit

Part Number: HTH-HT-213323

Not Yet Reviewed

Estimated Ship Date: Tomorrow if ordered today

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Estimated Ship Date: Tomorrow if ordered today

Haltech Nexus S3 ECUs with Plug-and-Play Harness for 1990-1996 300ZX - HT-213319

Engine Management Systems, Nexus S3, ECU with Plug'n'Play Harness, for Nissan, Z32, Kit

Part Number: HTH-HT-213319

Not Yet Reviewed

Estimated Ship Date: Tomorrow if ordered today

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Estimated Ship Date: Tomorrow if ordered today

Haltech Nexus S3 ECUs with Plug-and-Play Harness for 1994-1998 SUPRA - HT-213324

Engine Management Systems, Nexus S3, ECU with Plug'n'Play Harness, Toyota, Supra A80, 2JZ, Kit

Part Number: HTH-HT-213324

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today