Bosch 13058 Oxygen Sensor - Upstream

Bosch Actual OE Oxygen Sensor 13058

Bosch 13058 is an Actual OE oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It is a narrow-band heated sensor with a specific-fit design for the upstream position on select BMW applications, including 1988-1991 BMW M3.

The Bosch Actual OE Oxygen Sensor line reflects Bosch’s long OE development history, including early thimble-style sensors and later planar narrowband designs that improved light-off speed, lambda accuracy, and closed-loop response. Bosch 13058 carries that OE-focused approach into the aftermarket with a threaded metal-body sensor, integrated wiring harness, and a 3-wire configuration for stable signal delivery.

Key Features

• Specific-fit oxygen sensor for the upstream position
• Narrow-band heated sensor design for closed-loop fuel control
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Round connector with 3 terminals and 3-wire harness
• Wiring harness included for direct replacement use
• Metal housing built for high-temperature and vibration exposure
• Bosch part number 13058 for catalog and cross-reference lookup

Detailed Description

Bosch 13058 is an OE-style switching oxygen sensor that measures exhaust oxygen content and sends the signal the ECU uses to manage fuel delivery. For 1988-1991 BMW M3 upstream service, this sensor supports accurate air-fuel control during warm-up and normal operating conditions, helping the engine maintain stable combustion and emissions performance. The Bosch Actual OE Oxygen Sensor line is engineered around ceramic sensing elements, controlled heater operation, and durable materials suited to demanding exhaust environments.

This part cross-references BMW 11781310838 for the same application. Bosch 13058 is a direct-fit choice for BMW M3 oxygen sensor replacement work where the original upstream narrow-band heated sensor needs to be restored.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough idle caused by inaccurate air-fuel feedback
• Fuel trim issues from slow or weak sensor response
• Failed emissions inspection tied to sensor degradation
• Closed-loop operation problems after sensor aging or contamination

Installation Notes and Tips

Install Bosch 13058 in the upstream threaded location specified for the vehicle application. Verify connector shape, terminal count, thread size, and harness routing before installation. Use proper oxygen sensor service tools to avoid damaging the 18 mm threaded bung or the sensor body, and confirm the exhaust system is cool before removal or installation.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development experience. The Actual OE Oxygen Sensor line is built to the same OE-proven standards trusted by vehicle manufacturers, with materials and heater control chosen for consistent operation under thermal and vibration load.