Bosch 18064 Oxygen Sensor - Upstream

Bosch Wideband Oxygen Sensor for Honda and Acura

Bosch Validated Oxygen Sensor 18064 is a direct-fit wideband air-fuel ratio sensor for select Honda and Acura applications. It delivers continuous, high-precision lambda measurement to help the ECU manage fueling more accurately across changing load and temperature conditions.

Built with a heated design, threaded mounting, and a 4-wire blade-terminal configuration, this Bosch oxygen sensor is made for upstream replacement on vehicles that rely on wideband feedback for precise engine control.

Key Features

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement
• Heated sensor with optimized heater control for faster operating response
• Specific-fit replacement with rectangle male connector and 4 terminals
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing with robust ceramic construction for thermal durability
• Wiring harness included; harness length measures 11.5 in
• Overall length: 15.0 in; sealing surface to connector end: 13.8 in

Product Details

Bosch 18064 is part of the Bosch Validated Oxygen Sensor line, a product line focused on OE-style replacement for modern engine management systems. Bosch pioneered the wideband A/F oxygen sensor design used in many current emissions and fuel-control strategies, and this sensor reflects that development with fast light-off behavior, stable heater performance, and accurate feedback across the full lambda range. It is a direct replacement for upstream sensor locations on select Acura ILX, Acura TLX, Acura TSX, Acura RDX, Honda Fit, Honda CR-V, Honda Accord, Honda CR-Z, Honda Civic, Honda Crosstour, and Honda Insight applications.

This part cross-references Honda/Acura OE numbers such as 36531R40A01 and 36531RB0003 for the same application. Bosch 18064 is a practical choice when replacing a worn upstream wideband sensor on vehicles that depend on precise air-fuel control.

Common Issues This Sensor Can Help Address

• Check engine light related to oxygen sensor or air-fuel ratio sensor faults
• Rough idle or unstable fuel trim readings from an aging upstream sensor
• Reduced fuel economy caused by inaccurate mixture feedback
• Delayed sensor response during cold start or rapid throttle changes
• Emissions test failures tied to improper air-fuel ratio control

Installation Notes

Compatible With upstream sensor locations only on the listed Honda and Acura applications. Verify connector shape, wire count, thread size, and harness length before installation. Use the correct oxygen sensor socket for the 22 mm hex and 18 mm threaded mounting. Inspect the exhaust bung and wiring routing before final tightening to avoid harness strain or exhaust contact.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development in engine management and emissions technology. The Bosch Validated Oxygen Sensor line is built to OE-proven standards for accurate signal output, dependable heater performance, and long service life in demanding thermal conditions.