Elite 750 Mazda Miata (MX-5) NB Plug'n'Play Adaptor Harness (HT-140621)

Put a Haltech Elite 750 in an NB Miata without cutting a single factory wire.

The Haltech Elite 750 Mazda Miata (MX-5) NB Plug'n'Play Adaptor Harness sits between the factory engine harness and a Haltech Elite 750 ECU. One side carries the factory ECU connectors, the other plugs straight into the Elite, so the factory loom stays untouched and the swap is fully reversible. A typical install is a few hours, not a weekend of pinouts and splices. It suits NB cars with the three-plug, three-row factory ECU: the 1.8L VCT NB8B (2001-2004), the Australian factory-turbo SE, and the 2004-2005 USA Mazdaspeed NB8C. Manual transmission only.

Need the ECU as well? The same application is also available as: Elite 750 ECU kit (HT-150621), adaptor harness only, Elite 1000/1500 (HT-140921), Elite 1500 ECU kit (HT-150921).

What You'll Feel

• A boosted NB that drives like Mazda built it that way
• VVT kept working and mapped to suit the cam and turbo you actually have
• Factory connectors that click home instead of a loom you have to rebuild
• A stock harness you can return to at any time

Features

• Plug 'n' play adaptor with the Mazda Miata (MX-5) NB factory ECU connector layout
• Suits Haltech Elite 750 ECUs
• No cutting or splicing of the factory harness, fully reversible
• Includes an M14 x 1.5 air temp sensor with plug and pins, so the ECU sees real intake temperature from day one
• Auxiliary I/O 16-pin Tyco plug and pins for extra sensors and outputs (wideband, fuel and oil pressure, flex fuel)
• Haltech quick start guide walks through the fit
• Backed by the Haltech limited warranty

The Details

Part number HT-140621. Mazda Miata (MX-5) 1.8L VCT NB8B (01-04), 1.8L Factory Turbo SE (Aus), Mazdaspeed NB8C (04-05 USA) with 3-plug 3-row factory ECU. Manual transmission only. Unsure whether your car matches? Send us the VIN or a photo of the factory ECU plug before ordering and we will confirm.

Kit Includes

• 1x Plug'n'Play adaptor harness
• 1x M14 x 1.5 air temp sensor with matching plug and pins
• 1x Auxiliary I/O 16 Pin Tyco plug and pins. waterproof USB cap
• 1x USB programming cable

Applications

• Mazda Miata (MX-5) NB, BP 1.8L, VVT and Mazdaspeed turbo
• 2001-2005 Mazda MX-5 Miata
• Requires a Haltech Elite 750 ECU (sold separately)

Tuned By Shawn is a Platinum Haltech Dealer with in-house wiring and remote tuning. If this is part of a larger build, ask and we will spec the full parts list.