Oxygen Sensor for 2003-2007 Ford Focus - Bosch 15804

Bosch 15804 oxygen sensor for the 2003-2007 Ford Focus 4-cylinder 2.3L and the 2005-2007 Focus 4-cylinder 2.0L measures the oxygen in the exhaust and reports the air-fuel ratio to the ECU. This Bosch O2 sensor is a heated, narrow-band, switching-type unit that helps the ECU hold stable combustion control and keep emissions down.

• Switching-type narrow-band sensor that gives the ECU precise air-fuel-ratio readings
• Advanced ceramic element and optimized heater control for consistent readings
• Withstands exhaust gas up to 1,880°F; metal housing, integrated heater element and TSP coating resist vibration, corrosion and contamination
• Reaches operating temperature in under 10 seconds for quick closed-loop control and cold-start response

Quick facts

• Part: Bosch 15804 oxygen sensor
• Fits: 2003-2007 Ford Focus 4-cylinder 2.3L and the 2005-2007 Focus 4-cylinder 2.0L
• Position: Upstream
• Material: Metal housing
• Condition: New

A check engine light, a rougher idle or poorer fuel economy can show up when an upstream oxygen sensor wears out. A vacuum leak, a misfiring spark plug or an exhaust leak can be behind those signs too, so track down the cause before you buy.

Fits

This listing is one upstream sensor. It fits the 2003-2007 Ford Focus 4-cylinder 2.3L and the 2005-2007 Focus 4-cylinder 2.0L, and each of those engines takes one.

Specifications

In the box

One oxygen sensor with its wiring harness. A mounting bracket is not included, and an old one may not be reusable.

Installation notes

• Pre-applied conductive anti-seize is on the threads.
• Direct-fit connectors make for a quick installation.