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Bosch 16218 Oxygen Sensor - Downstream
| Brand | Bosch 16218 |
|---|---|
| Position | Downstream |
| Product line | Actual OE Oxygen Sensor |
| Fits | BMW · 3 vehicles |
OE direct replacement. Bosch Actual OE line reflects OE-proven development and fitment-ready replacement design.
Heated narrow-band sensor. Provides precise air-fuel measurements for stable combustion control and lower emissions.
Threaded metal housing. Built with high-temperature-resistant materials for consistent performance under harsh conditions.
Cross-references 11787603023 for the same application. See all 1.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Bosch Actual OE Oxygen Sensor for BMW
Bosch 16218 is a specific-fit, narrow-band heated oxygen sensor built for downstream applications on select BMW models. It provides the ECU with air-fuel-ratio feedback for stable closed-loop control and emissions management.
Key Features
- Actual OE Oxygen Sensor from Bosch
- Narrow-band heated O2 sensor design
- Specific fit with threaded mounting
- 4-wire harness with rectangular male connector
- 18 mm thread size and 22 mm hex size
- Steel finish with metal housing for underbody use
- Wiring harness included
- Wiring harness length: 11.6 in; overall length: 15 in
Product Details
Bosch 16218 is part of the Bosch Actual OE Oxygen Sensor line, which draws on Bosch’s long OE development history in oxygen sensing technology. This sensor uses a heated narrow-band design with advanced ceramic elements and controlled heater operation to deliver accurate switching-type feedback under changing exhaust temperatures. For BMW owners, Bosch 16218 supports downstream monitoring on the 2011 BMW 528i and 2011-2012 BMW X3, including the specified cylinder-bank applications. This part cross-references 11787603023 for the same application.
What It Helps Address
- Check engine light caused by oxygen sensor signal faults
- Rough idle or unstable fuel control from inaccurate exhaust feedback
- Excessive emissions from delayed or incorrect closed-loop operation
- Slow sensor response after warm-up
- Driveability issues related to downstream sensor failure
Installation Notes
Install Bosch 16218 in the threaded downstream location specified for the vehicle application. Verify connector shape, terminal count, wire quantity, and harness length before installation. Use the correct 18 mm thread size and 22 mm hex size during removal and tightening, and confirm the sensor routing keeps the harness clear of heat and moving components. For BMW 528i and BMW X3 applications, match the cylinder-bank and position notes exactly to the vehicle.
Quality Assurance
Bosch supplies OE-proven oxygen sensor technology to the aftermarket, with designs focused on accurate lambda measurement, fast light-off, and durable operation in high-temperature, high-vibration environments. Bosch 16218 is built as a standard replacement part for direct-fit service on the listed BMW applications.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2012 | BMW | X3 | 3.0L | L6 | Downstream | Cylinder(s) 4, 5, and 6; Actual OE Oxygen Sensor |
| 2011 | BMW | 528i | 3.0L | L6 | Downstream | Cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor |
| 2011 | BMW | X3 | 3.0L | L6 | Downstream | Cylinder(s) 4, 5, and 6; Actual OE Oxygen Sensor |
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