Bosch 13706 Oxygen Sensor - Upstream

Bosch Wideband O2 Sensor for Honda

Bosch Validated Oxygen Sensor 13706 is a specific-fit wideband air-fuel ratio sensor for select Honda applications. It provides the ECU with continuous, high-precision air-fuel data for accurate mixture control, stable drivability, and lower emissions.

Key Features

• Wideband A/F oxygen sensor with continuous lambda-range measurement
• Heated design for faster sensor activity and stable operation
• Specific fit with 4-wire configuration and included wiring harness
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing with rectangle male connector and blade terminals
• Overall length: 13.2 in; harness length: 9.8 in

Product Details

Bosch part number 13706 is built as a standard replacement oxygen sensor for upstream locations on select Honda Civic and Honda CR-V models. It uses Bosch wideband technology to deliver more detailed air-fuel feedback than a traditional switching sensor, helping the engine control system maintain precise fueling during idle, cruise, acceleration, and load changes. Bosch Validated Oxygen Sensor 13706 reflects Bosch’s long OE development history and the company’s role in advancing planar pump-cell wideband sensor design for modern engine management.

This part cross-references Bosch 36531PPA305 and 36531PZAA01 for the same application.

Vehicle Fitment

• Fits 2003-2005 Honda Civic, upstream, without California Emission System.
• Fits 2002-2004 Honda CR-V, upstream.

Common Replacement Reasons

• Check engine light related to oxygen sensor performance
• Rough idle or inconsistent air-fuel control
• Reduced fuel economy from inaccurate sensor readings
• Emissions test failure tied to upstream sensor response
• Slow sensor switching or degraded wideband signal output

Installation Notes

Confirm the upstream location, connector shape, terminal count, and thread size before installation. Use the existing threaded mounting point and verify the harness routing matches the original sensor path on the Honda Civic or Honda CR-V application. Always compare the old sensor connector and wire length to Bosch 13706 before final fitment.

Quality Assurance

Bosch Validated Oxygen Sensor 13706 is backed by Bosch’s OE-focused sensor development and aftermarket validation standards. The design uses robust ceramic construction, optimized heater control, and fast light-off characteristics for dependable operation under changing thermal conditions.