Bosch 15295 Oxygen Sensor - Upstream

Bosch Oxygen Sensor 15295 Overview

Bosch 15295 is a specific-fit, narrow-band heated oxygen sensor built for precise air-fuel ratio feedback to the ECU. It is engineered for upstream use on select Chevrolet Tracker and Suzuki Grand Vitara applications, where accurate exhaust monitoring is critical for stable closed-loop operation and emissions control.

The Bosch Engineered Oxygen Sensor line draws on Bosch OE development dating back to the original thimble sensor and later planar narrowband designs. That product line focuses on fast sensor response, accurate lambda measurement, and durable operation under high heat and vibration.

Key Features

• Specific-fit Bosch oxygen sensor for direct application matching
• Narrow-band heated O2 sensor design for upstream exhaust monitoring
• 4-wire configuration with square connector and blade terminals
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing with high-temperature-resistant construction
• Wiring harness included with 6.1 in harness length
• Fits 2001-2004 Chevrolet Tracker, upstream
• Fits 1999-2000 Suzuki Grand Vitara, upstream

Detailed Description

Bosch 15295 is a standard replacement oxygen sensor that measures exhaust oxygen content and sends that data to the engine control unit for fuel-trim correction. In upstream locations, this sensor plays a direct role in closed-loop fuel control, helping the engine maintain the proper air-fuel balance during warm-up and normal driving. For drivers searching for a Bosch oxygen sensor 15295 for Chevrolet Tracker upstream or a Suzuki Grand Vitara upstream O2 sensor, this part matches the listed applications.

This Bosch Engineered Oxygen Sensor uses a heated narrow-band design with a threaded metal body, male connector, and male blade terminals. The sensor is built for consistent signal output across changing operating conditions, including thermal cycling and vibration. This part cross-references 1821367D00 and 30025846 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect fuel mixture readings at the ECU
• Rough idle caused by inaccurate upstream O2 feedback
• Reduced emissions performance from a worn sensor
• Slow closed-loop response after engine warm-up

Installation Notes and Tips

Verify the connector shape, wire count, thread size, and upstream location before installation. The sensor uses an 18 mm thread and 22 mm hex size, so the correct oxygen sensor socket or wrench is recommended. Confirm the harness routing and connector orientation on the vehicle before securing the wiring away from heat sources.

For fitment, use Bosch 15295 on 2001-2004 Chevrolet Tracker, upstream, and 1999-2000 Suzuki Grand Vitara, upstream. Always compare the original sensor connector and mounting style to the replacement part before installation.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development in engine management and emissions sensing. The Bosch Engineered Oxygen Sensor line is built to OE-style standards for accurate signal delivery, stable heater performance, and durable service in demanding exhaust environments.