Ignitions and Electrical› Wiring Harnesses

Haltech

Haltech NEXUS S2/S3 Plug-n-Play Adapter Harness

$495.00

SKU: H002 HT-186337

Special Order
Special Order
Ships in 4–6 weeks
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Haltech HT-186337 is a plug-n-play adapter harness for Haltech NEXUS S2/S3 ECUs, providing seamless integration for the 2001-2005 Mazda Miata NB with 3-plug, 3-row factory ECU and manual transmission.

Fitment

Fitment Guaranteed

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on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandHaltech
Part NumberH002 HT-186337

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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