BMW E9X 3-Series Pre Cat Oxygen Sensor OEM 11787558055 or 11787558073

The BMW E9X 3-Series Pre Cat O2 Sensor is a crucial component for optimizing your vehicle's performance. Located before the catalytic converter, this oxygen sensor plays a key role in measuring the air-fuel mixture, ensuring that your car runs efficiently and within emissions standards.

Crafted by Bosch, a trusted name in the automotive industry, this OEM oxygen sensor guarantees quality and reliability. Replacing a faulty O2 sensor can lead to numerous benefits for your vehicle.

• Enhanced Fuel Efficiency: A working oxygen sensor accurately monitors the engine's air-to-fuel ratio, helping to improve your car's mileage and reduce fuel costs.
• Reduced Emissions: A properly functioning pre-cat O2 sensor minimizes harmful emissions, ensuring compliance with environmental standards.

When selecting your O2 sensor, you can choose between two locations:

• Part # 11 78 7 558 055 - Pre cat in front manifold (Cyl 1-3) with a length of 1400mm.
• Part # 11 78 7 558 073 - Pre cat in rear manifold (Cyl 4-6) with a length of 910mm.

The following cross-reference numbers are also available for your convenience:

• 11787558055
• 11787558073
• 17098
• 17099
• 0-258-017-0999

Installing a new pre cat O2 sensor can make a significant difference in your BMW E9X's performance. Don’t wait until your check engine light comes on; upgrade today to experience the benefits of an efficient and responsive driving experience.