Bosch 13458 Oxygen Sensor - Downstream or Upstream

Bosch Actual OE Oxygen Sensor for Hyundai

Bosch 13458 is a specific-fit, narrow-band heated oxygen sensor built for precise air-fuel ratio feedback to the ECU. It supports stable combustion control and emissions management for select Hyundai Accent, Elantra, and Tiburon applications.

Key Features

• Actual OE Oxygen Sensor from Bosch Actual OE Oxygen Sensor line
• Narrow-band heated design for faster closed-loop operation
• Specific fit with threaded mounting and square female connector
• 4-wire configuration with included wiring harness
• 18 mm thread diameter and 22 mm hex size
• Metal housing with high-temperature-resistant construction
• Fits upstream and downstream positions on listed Hyundai applications

Product Details

Bosch 13458 uses a switching-type sensing element to measure exhaust oxygen content and send accurate feedback to the engine control unit. Bosch developed this oxygen sensor technology through decades of OE engineering, including planar narrowband designs that improve light-off speed, lambda accuracy, and closed-loop response. For drivers servicing a 1995-1997 Hyundai Accent, 1996-1997 Hyundai Elantra, or 1997 Hyundai Tiburon, this sensor provides the OE-style signal behavior expected by the vehicle calibration.

This part cross-references Hyundai OE applications (e.g., 3921022020, 3921022025) for the same application. Bosch 13458 is a direct replacement choice when the original sensor has aged, slowed response, or triggered emissions-related faults.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rich or lean fuel trim conditions caused by inaccurate exhaust feedback
• Slow sensor response during closed-loop operation
• Emissions test failures tied to a worn narrow-band sensor
• Rough idle or drivability issues linked to incorrect air-fuel control

Installation Notes and Tips

Verify the connector shape, wire count, thread size, and sensor position before installation. This Bosch 13458 sensor is listed for upstream and downstream locations depending on the vehicle and emission package, including 1996-1997 Hyundai Accent, 1996-1997 Hyundai Elantra, and 1997 Hyundai Tiburon applications. Use the vehicle’s original routing and mounting point, and confirm the harness length reaches the factory connector without strain.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development and aftermarket supply experience. The design uses ceramic sensing elements, controlled heating, and durable materials selected for high thermal and vibration loads.