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Bosch 16977 Oxygen Sensor - Downstream
| Brand | Bosch 16977 |
|---|---|
| Position | Downstream |
| Product line | Actual OE Oxygen Sensor |
| Fits | BMW · 6 vehicles |
Actual OE design. Built as a direct-fit replacement for straightforward installation.
Narrow-band sensor. Provides precise air-fuel-ratio readings for stable combustion control.
Heated construction. Helps the sensor reach operating temperature faster and stay consistent.
Cross-references 11787569968 for the same application. See all 1.
Bosch 16977 Oxygen Sensor for BMW 528i
Bosch 16977 is a direct-fit, heated narrow-band oxygen sensor for specific BMW downstream applications. It provides the ECU with accurate air-fuel-ratio feedback to support stable combustion control and lower emissions in normal driving conditions.
Key Features
- Direct fit oxygen sensor for specific BMW applications
- Heated narrow-band design for quicker closed-loop operation
- Threaded mounting with 18 mm thread diameter and 22 mm hex size
- 4-wire configuration with included wiring harness
- Round female connector with pin terminals
- Steel finish and metal housing for underbody durability
- Wiring harness length: 16 in; overall length: 19.4 in
Product Details
This Bosch Actual OE Oxygen Sensor is built around Bosch switching-type sensor technology, which measures exhaust oxygen content so the engine control unit can adjust fueling precisely. Bosch developed this narrow-band sensor design from its long OE engineering history, focusing on faster sensor response, improved lambda accuracy, and reliable heater control under heat and vibration. Bosch 16977 is a standard replacement oxygen sensor for downstream use on the BMW 528i, BMW 528i xDrive, and BMW 528xi listed below.
This part cross-references BMW 11787569968 for the same application.
Vehicle Fitment
- Fits 2008-2010 BMW 528i, downstream; cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor
- Fits 2009-2010 BMW 528i xDrive, downstream; cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor
- Fits 2008 BMW 528xi, downstream; cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor
What It Helps Address
- Check engine light related to oxygen sensor performance
- Rich or lean fuel trim conditions caused by inaccurate exhaust feedback
- Slow closed-loop response after startup
- Emissions test failures tied to downstream sensor faults
- Rough combustion control from a worn heated O2 sensor
Installation Notes
Use the threaded mounting point and verify the 4-wire round connector matches the original sensor before installation. Confirm downstream placement and vehicle-specific fitment for the BMW 528i, BMW 528i xDrive, or BMW 528xi listed above. Inspect the harness routing and connector condition during replacement to help avoid wiring strain or poor terminal contact.
Quality Assurance
Bosch has more than five decades of OE oxygen sensor development and supplies aftermarket sensors built to OE-proven standards for accuracy, durability, and consistent heater performance.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2010 | BMW | 528i | 3.0L | L6 | Downstream | Cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor |
| 2010 | BMW | 528i xDrive | 3.0L | L6 | Downstream | Cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor |
| 2009 | BMW | 528i | 3.0L | L6 | Downstream | Cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor |
| 2009 | BMW | 528i xDrive | 3.0L | L6 | Downstream | Cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor |
| 2008 | BMW | 528i | 3.0L | L6 | Downstream | Cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor |
| 2008 | BMW | 528xi | 3.0L | L6 | Downstream | Cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor |
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