---
product_id: 30325912
title: "Michigan Motorsports TPI TBI 3-Wire Heated Oxygen O2 Sensor Wire Harness Adapter - Fits IROC - 48\" Lead - Compatible with AFS74"
brand: "michigan motorsports"
price: "5661 som"
currency: KGS
in_stock: true
reviews_count: 8
url: https://www.desertcart.kg/products/30325912-michigan-motorsports-tpi-tbi-3-wire-heated-oxygen-o2-sensor
store_origin: KG
region: Kyrgyzstan
---

# 48-inch extended lead 3-wire heated sensor upgrade easy plug-and-play install Michigan Motorsports TPI TBI 3-Wire Heated Oxygen O2 Sensor Wire Harness Adapter - Fits IROC - 48" Lead - Compatible with AFS74

**Brand:** michigan motorsports
**Price:** 5661 som
**Availability:** ✅ In Stock

## Summary

> 🔥 Upgrade your ride’s brain with precision and speed!

## Quick Answers

- **What is this?** Michigan Motorsports TPI TBI 3-Wire Heated Oxygen O2 Sensor Wire Harness Adapter - Fits IROC - 48" Lead - Compatible with AFS74 by michigan motorsports
- **How much does it cost?** 5661 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/30325912-michigan-motorsports-tpi-tbi-3-wire-heated-oxygen-o2-sensor)

## Best For

- michigan motorsports enthusiasts

## Why This Product

- Trusted michigan motorsports brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Simplicity:** Minimal wiring steps for quick, professional-grade installation🔧
- • **Boost Engine Efficiency:** Enables precise air-fuel readings for improved fuel economy and lower emissions
- • **Flexible Fit for Any Ride:** Generous 48-inch lead ensures hassle-free routing and clean installs📏
- • **Broad Sensor Compatibility:** Works seamlessly with ACDelco AFS74 and equivalents for versatile upgrades
- • **Heat Up Faster, Perform Better:** Upgrades single-wire to 3-wire heated O2 sensor for rapid optimal temp🔥

## Overview

The Michigan Motorsports TPI TBI 3-Wire Heated Oxygen Sensor Wire Harness Adapter transforms your vehicle’s single-wire O2 sensor setup into a 3-wire heated system, ensuring faster sensor warm-up and accurate air-fuel ratio readings. With a 48-inch lead for flexible installation and compatibility with ACDelco AFS74 sensors, it’s the perfect upgrade for enhanced engine performance, fuel efficiency, and reduced emissions—especially when running aftermarket headers.

## Description

Upgrade your vehicle's oxygen sensor system with the TPI TBI 3-Wire Heated Oxygen Sensor Wire Harness Adapter, designed to facilitate the installation of a 3-wire heated O2 sensor on vehicles originally equipped with a single-wire sensor. This adapter is particularly beneficial for applications involving aftermarket headers, which can reduce exhaust temperatures and impede the O2 sensor's ability to reach optimal operating temperature. By incorporating a heated sensor, this harness ensures accurate readings and improved engine performance. The 48-inch lead provides ample length for versatile installation, and the adapter is compatible with ACDelco AFS74 sensors or equivalents. Installation is straightforward: connect the OEM O2 sensor lead, wire the red lead to a "RUN" switched source, ground the black wire, and plug in your heated O2 sensor. This harness is an ideal solution for enthusiasts looking to enhance their vehicle's efficiency and performance.

## Features

- Enhanced Sensor Performance: Facilitates the upgrade from a single-wire to a 3-wire heated O2 sensor, ensuring the sensor reaches optimal operating temperature quickly, especially beneficial when using aftermarket headers that lower exhaust gas temperatures.
- Extended Lead Length: Features a 48-inch lead, providing flexibility in routing and installation, accommodating various vehicle configurations and ensuring a secure and tidy setup.
- Easy Installation: Designed for straightforward installation: connect to the OEM O2 sensor lead, wire the red lead to a "RUN" switched source, ground the black wire, and plug in the heated O2 sensor, minimizing installation time and effort.
- Compatibility: Compatible with ACDelco AFS74 sensors or equivalent, ensuring broad applicability across various vehicle models and making it a versatile choice for upgrades or replacements.
- Improved Engine Efficiency: By enabling the use of a heated O2 sensor, this adapter contributes to more accurate air-fuel ratio readings, leading to improved engine performance, fuel efficiency, and reduced emissions.

## Product Details

- **Brand:** Michigan Motorsports
- **Material:** Lead
- **Connector Type:** Deutsch Dt, Ring Terminal/Spade
- **Manufacturer:** Michigan Motorsports

## Images

![Michigan Motorsports TPI TBI 3-Wire Heated Oxygen O2 Sensor Wire Harness Adapter - Fits IROC - 48" Lead - Compatible with AFS74 - Image 1](https://m.media-amazon.com/images/I/61pSUhCOmsL.jpg)
![Michigan Motorsports TPI TBI 3-Wire Heated Oxygen O2 Sensor Wire Harness Adapter - Fits IROC - 48" Lead - Compatible with AFS74 - Image 2](https://m.media-amazon.com/images/I/615mdViwEjL.jpg)
![Michigan Motorsports TPI TBI 3-Wire Heated Oxygen O2 Sensor Wire Harness Adapter - Fits IROC - 48" Lead - Compatible with AFS74 - Image 3](https://m.media-amazon.com/images/I/61Fn4PMoF4L.jpg)
![Michigan Motorsports TPI TBI 3-Wire Heated Oxygen O2 Sensor Wire Harness Adapter - Fits IROC - 48" Lead - Compatible with AFS74 - Image 4](https://m.media-amazon.com/images/I/61wiL1ooTrL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Get this if you run with headers for sure!
*by R***S on February 24, 2021*

For anyone that has went from manifolds to headers, I definitely would recommend this change. Ignore my crap wiring. I didn't put much effort into it. Wanted to see if it worked first.I have a 93 k1500 I've been building on and I went with hooker ceramic coated long tube headers. My exhaust system flows way better than previously and I stuck with my original single wire o2 that pretty much tells the computer "Hey, I'm an o2 sensor. Run open loop, run closed loop." My issue was that my original o2 was not getting hot enough to tell the computer to run closed loop so it was staying with the default fuel settings and dumping way more gas than it needed to when I was running it. Actually, it got to a point where my truck was blowing straight soot and my spark plugs were about as dark as a haunted house.I installed this and it did great. I do notice a slight positive difference in fuel mileage which is great and it gets the truck into closed loop a lot sooner when warming it up. I'm happy with that. I'm grounding it off the engine and running the positive off a key on source. Running some cataclean in the fuel to help take care of my neglect I previously mentioned.

### ⭐⭐⭐⭐⭐ PERFECT fit
*by H***C on April 12, 2017*

This product is perfect- I don't know what the other reviewer is talking about.My 1988 GMC truck had a 1-wire unheated o2 sensor-- this wiring harness mated PERFECTLY with Walker Products 250-23005 3-wire oxygen sensor (or ACDelco AFS74)-- the connection is waterproof, dustproof, and uses existing 1-wire plug to mate w/ my truck's stock o2 sensor plug. Ground and power wires are plenty long to allow routing away from hot exhaust components and reach several power/ground locations.Would recommend to anyone running older vehicles (like most late 80's-early 90's TBI GM cars and trucks) still using a 1-wire oxygen sensor.

### ⭐⭐⭐⭐⭐ Easy install
*by U***N on August 23, 2021*

This harness was purchased along with a heated O2 sensor. Simplified the wiring significantly being I was only running a 1 wire O2 sensor. Truck runs much better now.

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-01-29*