LSU4.9 Wideband hardware pack

Overview

The Haltech LSU4.9 Wideband Hardware Pack delivers precision air-fuel ratio monitoring essential for safe tuning and maximum power extraction. Built around Bosch's proven LSU4.9 sensor technology, this complete kit provides the accurate wideband feedback your Haltech ECU needs to run optimal fuelling maps across all load conditions, preventing costly engine damage from lean conditions.

Technical Specifications

• Part Number: HT-010746
• Sensor Type: Bosch LSU4.9 wideband oxygen sensor
• Harness Length: 1.2M (47 inches)
• Bung Thread: M18 x 1.5mm weld-in fitting
• Operating Range: Lambda 0.65-1.6 (AFR 9.5-24:1)
• Response Time: <150ms

Why You Need This

Accurate wideband feedback is non-negotiable for any serious engine build. Whether you're tuning an LS swap, boosted RB26, or high-compression naturally aspirated setup, the LSU4.9 sensor provides the precision AFR data your Haltech ECU needs for safe, powerful operation. Without proper wideband monitoring, you're essentially tuning blind — risking catastrophic engine damage from undetected lean conditions under boost or high load.

The LSU4.9 represents the gold standard in wideband technology, offering superior accuracy and faster response times compared to older narrowband sensors. This complete hardware pack eliminates the guesswork of sourcing compatible components separately. The included 1.2M harness provides ample length for most installations, from engine bay mounting to exhaust manifold or downpipe placement. Professional tuners rely on this exact sensor combination for everything from track day builds to competition engines pulling serious power.

ECU & System Compatibility

This LSU4.9 hardware pack integrates seamlessly with the full Haltech Nexus range including R3, R5, and Rebel ECUs, utilising plug-and-play connectivity with Nexus series harnesses. Also compatible with Elite series ECUs when paired with appropriate wideband controller modules. Contact our technical team to confirm optimal integration for your specific Haltech setup and installation requirements.

What's in the Box

• Bosch LSU4.9 wideband oxygen sensor
• M18 x 1.5mm weld-in exhaust bung
• 1.2M plug-and-play harness for Nexus series ECUs
• Installation hardware and documentation

Complete Your Build

Most customers fitting wideband sensors also require exhaust fabrication work to properly position the bung for optimal readings. Consider pairing this with appropriate exhaust clamps and heat shielding for professional installation. Our technical team can recommend the ideal sensor placement for your specific exhaust configuration and provide guidance on proper installation techniques. With UK stock available for immediate despatch, we can get your wideband monitoring sorted quickly, backed by our in-house tuning expertise and post-installation support.