
No wiring needed
No ECU included
Elite 1000/1500 Mazda Miata (MX-5) NB Plug'n'Play Adaptor Harness (HT-140921)
SKU: HT-140921
No wiring needed
No ECU included
ECUs always ship FREE with Tuned By Shawn!
Manufacturer Limited Warranty

Elite 1000/1500 Mazda Miata (MX-5) NB Plug'n'Play Adaptor Harness (HT-140921)
Product details
Description
Put a Haltech Elite 1000/1500 in an NB Miata without cutting a single factory wire.
The Haltech Elite 1000/1500 Mazda Miata (MX-5) NB Plug'n'Play Adaptor Harness sits between the factory engine harness and a Haltech Elite 1000/1500 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: 2001-2005 USA models (2000-2004 Australia), VCT and non-VCT, including the factory-turbo Mazdaspeed / SE. Manual transmission only.
Need the ECU as well? The same application is also available as: adaptor harness only, Elite 750 (HT-140621), Elite 750 ECU kit (HT-150621), 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 1000/1500 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-140921. Mazda Miata (MX-5) NB ADM Special Edition (Factory Turbo), USDM Special Edition (Factory Turbo), VCT, Non-VCT (00-04 Aust, 01-05 USA). 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
Applications
- Mazda Miata (MX-5) NB, BP 1.8L, VVT and Mazdaspeed turbo
- 2001-2005 Mazda MX-5 Miata
- Requires a Haltech Elite 1000/1500 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.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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