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Bosch 16789 Oxygen Sensor - Downstream or Downstream Front
| Brand | Bosch 16789 |
|---|---|
| Position | Downstream and Downstream Front |
| Wiring Harness Length | 15.6 |
| Terminal Type | Pin |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Grade Type | Standard replacement |
| Connector Shape | Round |
| Terminal Quantity | 4 |
| Connector Gender | Female |
| Terminal Gender | Female |
| Overall Length | 19 |
| Mounting Type | Threaded |
| Additional Accessories Included | No |
| Automotive Color / Finish | Steel |
| Automotive Item Weight (lbs) | 0.295419 lb |
| Heated (Oxygen Sensor) | Yes |
| Hex Size (Oxygen Sensor) | 22 mm |
| Housing Material | Metal |
| Length (Sealing Surface To End Of Connector) | 17.8 in |
| Mounting Bracket Included | No |
| Oxygen Sensor Type | Narrow-band heated |
| Sensor Type | Narrow-band |
| Thread Diameter (Oxygen Sensor) | 18 mm |
| Thread Size | 18 |
| Wiring Harness Included | Yes |
| Product line | Actual OE Oxygen Sensor |
| Fits | BMW · 8 vehicles |
Actual OE line. Bosch OE-developed oxygen sensor technology for accurate air-fuel feedback.
Heated narrow-band design. Supports faster light-off and quicker closed-loop operation.
Specific-fit replacement. Threaded sensor with 4-wire harness and female connector.
Cross-references 11787545243 for the same application. See all 1.
Overview
Bosch 16789 is an Actual OE oxygen sensor built as a standard replacement for specific BMW applications. It uses a narrow-band heated design to deliver precise air-fuel-ratio feedback to the ECU for stable combustion control and lower emissions.
Compatible With BMW 535i, BMW 535i xDrive, and BMW 535xi applications listed below, this Bosch oxygen sensor is engineered for threaded installation and OE-style electrical connection. The Bosch 16789 part number is used for the same application as the listed interchange reference.
Key Features
- Narrow-band heated oxygen sensor for closed-loop fuel control
- Actual OE product line from Bosch
- Threaded mounting with 18 mm thread size and 22 mm hex
- Female connector with 4 terminals and 4-wire harness
- Metal housing with high-temperature-resistant construction
- Wiring harness included
Detailed Description
Bosch 16789 is a specific-fit oxygen sensor for downstream applications on select BMW 535i, 535i xDrive, and 535xi models. It measures exhaust oxygen content and sends accurate feedback to the engine control unit, helping maintain consistent combustion control across changing load and temperature conditions. Bosch’s OE development history and ceramic sensing technology support fast light-off, accurate lambda measurement, and reliable operation under heat and vibration.
This part cross-references BMW 11787545243 for the same application. The Bosch 16789 oxygen sensor is a practical OE-style replacement when the original sensor has aged, slowed response, or triggered emissions-related faults.
What It Helps Address
- Check engine lights related to oxygen sensor performance
- Rich or lean fuel mixture readings
- Slow closed-loop fuel control response
- Emissions test failures tied to sensor accuracy
- Rough combustion control caused by a worn sensor
Installation Notes and Tips
Fits 2008 BMW 535xi, downstream. Fits 2008-2010 BMW 535i, downstream. Fits 2009-2010 BMW 535i, downstream front. Fits 2009-2010 BMW 535i xDrive, downstream. Verify connector shape, thread size, and harness length before installation. Use the listed fitment notes to confirm cylinder-bank location and exhaust-manifold placement where applicable.
Quality Assurance
Bosch backs this oxygen sensor with more than five decades of OE development and supplies it as part of its Actual OE Oxygen Sensor line, built to OE-proven standards for accuracy and durability.
| Year | Make | Model | Body Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2010 | BMW | 535i | Wagon | 3.0L | L6 | Downstream Front | Located in Exhaust Manifold; Actual OE Oxygen Sensor |
| 2010 | BMW | 535i | Sedan | 3.0L | L6 | Downstream | Cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor |
| 2010 | BMW | 535i xDrive | — | 3.0L | L6 | Downstream | Cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor |
| 2009 | BMW | 535i | Wagon | 3.0L | L6 | Downstream Front | Located in Exhaust Manifold; Actual OE Oxygen Sensor |
| 2009 | BMW | 535i | Sedan | 3.0L | L6 | Downstream | Cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor |
| 2009 | BMW | 535i xDrive | — | 3.0L | L6 | Downstream | Cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor |
| 2008 | BMW | 535i | — | 3.0L | L6 | Downstream | Cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor |
| 2008 | BMW | 535xi | — | 3.0L | L6 | Downstream | Cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor |
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