Will fit the following models:
1992 Mercury Grand Marquis
1993 Mercury Grand Marquis
1994 Mercury Grand Marquis
1998 Mercury Grand Marquis
- OE Identical Connector
- Design for Small Spaces
- Engine Performance Improvements
- Increased Fuel Efficiency
- Reduced Harmful Emissions
Bosch® Premium Oxygen Sensor (6604CF) Downstream position. A faulty oxygen sensor can impair engine performance and shorten the life of the catalytic converter. Tune-up your vehicle with a Bosch Oxygen Sensor, which is equally effective at improving fuel efficiency and lowering harmful exhaust emissions.
An oxygen sensor measures the amount of oxygen in the exhaust gases of a vehicle and sends a signal to the engine computer. The engine ECU uses this signal to fine-tune the air/fuel mixture to the optimal level for maximum catalyst efficiency and long service life. A faulty oxygen sensor can result in serious issues such as excessive fuel consumption and increased exhaust emissions, as well as shortening the life of a catalytic converter and affecting engine performance. Many car manufacturers around the world prefer Bosch oxygen sensors. To ensure environmental and functional robustness, each Bosch oxygen sensor is subjected to a 1,000 degree Celsius functional test as well as a leak test. Bosch oxygen sensors have a revolutionary Bosch patented universal connection system that is fully submersible in water, protects against contamination, and can withstand high temperatures and engine vibration.
**Please note some of our listings use stock photos which may be slightly different than the actual product.