Oxygen Sensor for 1999-2000 Mazda Miata - Bosch 13857

Bosch 13857 oxygen sensor for the 1999-2000 Mazda Miata 4-cylinder 1.8L measures the oxygen in exhaust gas so the engine computer can adjust the air-fuel ratio. This Bosch O2 sensor works in the downstream position and helps cut emissions.

• Switching-type narrow-band design with a heated element for precise air-fuel-ratio feedback
• Metal housing, integrated heater element and TSP coating resist vibration, corrosion and contamination in exhaust up to 1,880°F
• Reaches operating temperature in under 10 seconds for quick closed-loop control and cold starts

Quick facts

• Part: Bosch 13857 oxygen sensor
• Fits: 1996-1997 and 1999-2000 Mazda Miata 4-cylinder 1.8L
• Position: Downstream
• Material: Metal housing
• Condition: New

A check engine light, weaker fuel economy or a failed emissions test can point to a worn sensor, but an exhaust leak or a failing catalytic converter can be behind them too, so track down the cause first.

Fits

This sensor fits the 1996-1997 and 1999-2000 Mazda Miata 4-cylinder 1.8L. Both year ranges take one downstream sensor, and this listing is one sensor.

Specifications

In the box

One oxygen sensor with its wiring harness. A mounting bracket is not included.

Installation notes

• Conductive anti-seize comes pre-applied to the threads.
• Direct-fit connectors are made for quick installation.