WB2 Bosch Dual Channel O2 Controller Kit

The WB2 Bosch Dual Channel O2 Controller Kit from Haltech is a professional-grade wideband oxygen sensor controller designed for tuners and engine builders who demand precision fuel mixture control. This dual-channel system enables simultaneous monitoring and adjustment of air-fuel ratio across multiple engine configurations, making it essential for forced-induction builds, naturally aspirated performance engines, and complex fuel mapping scenarios. The kit arrives complete with sensors included, eliminating the need for separate purchases and ensuring compatibility from installation to first startup.

The WB2 Bosch Dual Channel O2 Controller Kit operates by reading real-time exhaust oxygen content through its included wideband sensors, translating that data into precise AFR (air-fuel ratio) values that feed directly into engine management systems or standalone ECUs. Unlike traditional narrowband sensors, wideband technology provides linear output across a much wider range, allowing tuners to maintain optimal combustion efficiency whether running rich for power or lean for efficiency. The dual-channel architecture accommodates split-fire ignition systems, twin-turbo setups, or independent cylinder bank monitoring, giving users granular control over fuel delivery and ignition timing on a per-bank or per-cylinder basis.

This universal kit suits serious enthusiasts, professional tuners, and race shops building high-horsepower engines where factory oxygen sensing falls short. Installation integrates with most aftermarket ECUs and standalone tuning platforms, though compatibility should be verified with your specific engine management hardware before purchase. The included Bosch sensors are industry-standard components recognized for reliability and repeatability, providing the foundation for repeatable, safe tuning across cold starts, idle, cruise, and full-load conditions. Weighing approximately 1.93 lbs and compact in footprint, the WB2 controller mounts easily in engine bays with limited space.