Bosch 17012 Premium Wideband A/F Oxygen Sensor Original Equipment

The Bosch 17012 is a premium wideband air/fuel ratio (A/F) oxygen sensor engineered to deliver continuous, precise exhaust gas measurements for modern engine management systems. Unlike conventional switching-style O2 sensors, this wideband sensor provides a proportional signal to the vehicle's ECU across the full lambda range, giving the engine control unit far more detailed air/fuel ratio data for optimized combustion control.

How It Works:

Wideband/Air-Fuel sensors perform the same function as a regular O2 sensor, but they precisely measure the amount of oxygen in the exhaust rather than simply switching between a rich or lean state. The sophisticated sensing element produces an output signal that is directly proportional to the oxygen content in the exhaust stream, enabling exceptionally accurate air/fuel mixture control across a wide measurement range.

Key Features:

• Advanced wideband sensing element for exact, continuous air/fuel ratio measurement
• Planar pump-cell design — the same technology Bosch pioneered as the global standard for modern engine management
• Fast light-off and optimized heater control for reliable performance from cold start
• Robust ceramic construction withstands rapid load changes and harsh thermal cycles
• Pre-coated threads with anti-seize compound included from the factory
• True direct-fit OE connectors and harness for a hassle-free installation
• 100% functionally tested with a seared protection tube for long service life
• Original equipment quality — built to the same specifications trusted by vehicle manufacturers worldwide

A failing or worn oxygen sensor can lead to reduced fuel economy, poor engine performance, and emissions test failure. The Bosch 17012 restores precise air/fuel ratio monitoring, supporting improved fuel efficiency, engine performance, and reduced harmful emissions. Backed by more than five decades of OE oxygen sensor development, Bosch remains the world's leading manufacturer of automotive O2 sensors.