LSU4.9 Wideband adaptor harness - LSU4.9 to DTM6

Overview

Connect your Bosch LSU4.9 wideband oxygen sensor directly to Haltech's DTM6 wideband controller input with this precision-engineered adaptor harness. Essential for retrofit installations and sensor upgrades, this harness eliminates wiring complications and ensures reliable AFR monitoring across your entire rpm and load range.

Technical Specifications

• Part Number: HT-010726
• Sensor Compatibility: Bosch LSU4.9 wideband oxygen sensor
• Controller Connection: DTM6 connector (Haltech standard)
• Construction: OEM-grade automotive wire and connectors
• Length: Optimised for clean engine bay routing

Why You Need This

The LSU4.9 is one of the most accurate and responsive wideband sensors available, but connecting it to your Haltech ECU's WB1 or WB2 controller requires the correct interface harness. This adaptor eliminates the guesswork and potential wiring errors that can cause erratic AFR readings or sensor damage. We've seen too many builds where DIY wiring attempts result in poor connections, voltage drops, or incorrect pin assignments that compromise tune quality.

Whether you're retrofitting an LSU4.9 to replace an older sensor in an RB25 or 2JZ build, or specifying one for a fresh LS swap with Haltech management, this harness ensures proper signal integrity from sensor to ECU. The DTM6 connector provides the secure, weatherproof connection that Haltech's wideband controllers expect, crucial for maintaining accurate AFR feedback during aggressive street driving or track sessions.

ECU & System Compatibility

Compatible with all Haltech ECUs featuring WB1 and WB2 wideband controller inputs, including the complete Elite range (550, 750, 1000, 1500, 2000, 2500), Nexus R3, R5, and Rebel series. Also works with standalone Haltech WB1 and WB2 wideband controllers when used with non-Haltech ECUs requiring external AFR monitoring.

What's in the Box

• LSU4.9 to DTM6 adaptor harness with pre-terminated connectors
• Installation documentation with pinout reference

Complete Your Build

Most customers fitting this harness also specify the Bosch LSU4.9 sensor itself, along with an M18 x 1.5 weld-in bung for exhaust installation. If you're upgrading an existing narrowband setup, consider adding our wideband gauge for cabin AFR monitoring alongside your ECU's internal logging. Our technical team can recommend the complete wideband package for your specific application and help ensure proper exhaust placement for accurate readings. UK stock means same-day despatch on complete wideband solutions.