What does a lambda sensor do?

A lambda sensor (oxygen sensor) monitors exhaust oxygen levels and provides feedback to the engine control unit to optimize the fuel-air mixture, improving fuel efficiency and reducing emissions.

What is the 400Hz frequency rating?

The 400Hz specification indicates the sensor's response frequency or switching rate, determining how quickly it can detect and report changes in exhaust composition.

What does the 120mm dimension refer to?

The 120mm measurement is the insertion/probe length, indicating the depth the sensor extends into the exhaust manifold or pipe.

Which vehicles is this sensor compatible with?

The ES20364-12B1 is designed for various OEM automotive applications. Verify compatibility with your specific vehicle's year, make, model, and engine type before installation.

How often should a lambda sensor be replaced?

Most oxygen sensors last 40,000-80,000 miles. Signs of failure include check engine lights, rough idle, or poor fuel economy. Follow manufacturer recommendations for your vehicle.

Can this sensor be used as a direct replacement?

Always verify the part number and connector type match your vehicle's original equipment. Using an incompatible sensor may cause engine management issues.