Fitment :  (Please look the compatibility list's note to know more details )

2000 BMW 323Ci 2.5L
1999-2000 BMW 323i 2.5L
2001-2003 BMW 325Ci 2.5L
2001-2003 BMW 325i 2.5L
2001-2005 BMW 325xi 2.5L
2000 BMW 328Ci 2.8L
1999-2000 BMW 328i 2.8L
2001-2003 BMW 330Ci 3.0L
2001-2003 BMW 330i 3.0L
2001-2005 BMW 330xi 3.0L
2001-2003 BMW 525i 2.5L
1999-2000 BMW 528i 2.8L
2001-2003 BMW 530i 3.0L
2004-2005 BMW X3 2.5L
2001-2006 BMW X5 3.0L
1999-2002 BMW Z3 2.5L
1998-2000 BMW Z3 2.8L
2001-2002 BMW Z3 3.0L
2003-2005 BMW Z4 2.5L
2003-2005 BMW Z4 3.0L
2003-2005 Land Rover Range Rover 4.4L

Features & Benefits:

• One-piece laser welded body for maximum protection and precise operation maintaining sensor integrity
• Dual internal talc seal makes Oxygen sensors last longer
• PTFE allows increased air flow for a faster switch rate to improve fuel economy and save the motorist money at the pump
• Stainless steel shield protects the element from thermal shock and regulates proper air flow to ensure faster sensor response and better performance
• Manufactured with the highest grade materials for prolonged life and superior performance

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Symptoms of a bad osygen sensor:

• Check Engine Light is ON

• A decrease in fuel economy

• Engine Hesitation or misfire

• Rough Idling

• look the oxygen sensor's leader 

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Installation steps:

Step1.Park your Vehicle, set the parking brakes and open the hood

Step2.Disconnect the negative battery terminal. Remove the plastic cover. Loosen the 10mm nut. Remove the negative clamp from the battery. 

Step3.Locate the oxygen sensor on your Vehicle. Do not touch the sensor or the heat shield until the engine cools down.

Step4.Press the connector and pull it away to unplug the oxygen sensor. Use a flat head screwdriver to press the locking tab on the connector before you pull it.

Step5.Place the oxygen sensor socket on the sensor and break it loose. If the sensor cannot be loosened spray penetrating oil and let it sit for at least 10 minutes. This will make it easier to remove the old Vehicle oxygen sensor.

Step6.Install the new oxygen sensor. Tighten the new Vehicle oxygen sensor to the recommended torque. If you are not sure what the correct torque call your Chevy dealer. 

Step7.Connect the oxygen sensor wire harness by plugging it in.

How does the oxygen sensor in a car work?

The goal of the sensor is to help the engine run as efficiently as possible and also to produce as few emissions as possible.
The oxygen sensor is positioned in the exhaust pipe and can detect rich and lean mixtures. The mechanism in most sensors involves a chemical reaction that generates a voltage. The engine's computer looks at the voltage to determine if the mixture is rich or lean, and adjusts the amount of fuel entering the engine accordingly.
The reason why the engine needs the oxygen sensor is because the amount of oxygen that the engine can pull in depends on all sorts of things, such as the altitude, the temperature of the air, the temperature of the engine, the barometric pressure, the load on the engine, etc.
When the oxygen sensor fails, the computer can no longer sense the air/fuel ratio, so it ends up guessing. Your car performs poorly and uses more fuel than it needs to.

NOTES: If you have any question, please contact us.