Haltech HT-010719 Wideband Extension Harness 1.2M for Bosch LSU4.9 O2 Sensor

Vehicle Fitment

• Universal - designed for use with all Haltech CAN Wideband Controllers that support the Bosch LSU4.9 wideband O2 sensor
• Also compatible with any wideband controller or device that uses the standard Bosch LSU4.9 sensor connector
• Suitable for any vehicle where the standard sensor cable length is insufficient to reach the controller or ECU

Fitment Notes

• Designed specifically for use with the Bosch LSU4.9 wideband O2 sensor. Not compatible with NTK sensor variants - see Haltech's NTK extension harness for those applications.
• Extension length is 1.2M (approximately 4 feet). For installations requiring greater reach, two extension harnesses can be used in series where the sensor cable allows.
• This harness extends the cable between the LSU4.9 sensor and its controller - ideal for larger chassis, rear-engine builds, or tunnel-mounted controller installations where the standard sensor lead is too short.

Features

• Extends the Bosch LSU4.9 wideband O2 sensor cable by 1.2M (4 feet) for flexible sensor and controller placement in larger or custom chassis builds.
• Compatible with Haltech CAN Wideband Controllers and any other device using the standard Bosch LSU4.9 sensor harness connector.
• Maintains signal integrity across the extension - built to Haltech's quality standards for accurate wideband AFR readings.
• Plug-and-play installation between the sensor and controller - no splicing or modifications required.
• Suitable for race cars, purpose-built vehicles, and custom installs where routing the sensor harness requires additional cable length.
• Compact, lightweight cable minimizes routing complexity in tight engine bay or underbody installations.

Specifications

• Part Number: HT-010719
• Type: Wideband O2 Sensor Extension Harness
• Length: 1.2M / 1200mm (approximately 4 feet)
• Compatible Sensor: Bosch LSU4.9 Wideband O2 Sensor
• Application: Universal - Haltech CAN Wideband Controller and LSU4.9-compatible devices

Included Components

• 1x Haltech Wideband Extension Harness (1.2M / 1200mm, suits Bosch LSU4.9)

Product Description

The Haltech HT-010719 is a 1.2M (4-foot) wideband sensor extension harness designed for use with the Bosch LSU4.9 wideband O2 sensor. It extends the standard sensor cable between the LSU4.9 sensor and the connected wideband controller, making it the solution for larger vehicles, custom chassis builds, or installations where the standard harness length doesn't reach the controller or ECU mounting location. The extension plugs directly in-line between the sensor and controller with no splicing required, maintaining clean signal integrity throughout.

This harness is commonly used in race cars and purpose-built vehicles where the wideband controller is mounted remotely from the sensor location - such as a firewall or dashboard mounting inside the cabin when the sensor bung is at the rear of a long exhaust system. It is compatible with Haltech CAN Wideband Controllers and any other wideband device using the standard LSU4.9 connector format. For NTK sensor applications, a separate Haltech NTK extension harness is required.