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Bosch 15951 Oxygen Sensor - Upstream
| Brand | Bosch 15951 |
|---|---|
| Position | Upstream |
| Wiring Harness Length | 6.1 |
| Terminal Type | Blade |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 3 |
| Grade Type | Standard replacement |
| Connector Shape | Oblong |
| Terminal Quantity | 3 |
| Connector Gender | Male |
| Terminal Gender | Male |
| Overall Length | 9.8 |
| Mounting Type | Threaded |
| Automotive Color / Finish | Steel |
| Automotive Item Weight (lbs) | 0.440925 lb |
| Heated (Oxygen Sensor) | Yes |
| Hex Size (Oxygen Sensor) | 22 mm |
| Housing Material | Metal |
| Length (Sealing Surface To End Of Connector) | 8.7 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 | Nissan · 1 vehicle |
OE-focused design. Bosch Actual OE Oxygen Sensor line reflects proven factory-style engineering.
Heated narrow-band. Provides faster light-off and accurate air-fuel feedback.
Threaded metal body. Uses an 18 mm thread size, 22 mm hex, and blade terminals.
Cross-references 226905S511 for the same application. See all 1.
Overview
Bosch 15951 is a specific-fit, heated narrow-band oxygen sensor for emission control applications. It provides air-fuel-ratio feedback to the ECU for stable combustion control and lower emissions. Fits 2001 Nissan Altima, upstream, from 12/2000.
Key Features
- Actual OE Oxygen Sensor line from Bosch
- Heated narrow-band design for quicker closed-loop operation
- Threaded mounting with 18 mm thread size and 22 mm hex
- Blade terminals, oblong connector, and included wiring harness
- Metal housing with high-temperature-resistant construction
Detailed Description
Bosch 15951 is built as a standard replacement oxygen sensor for precise exhaust feedback in emission control systems. The narrow-band heated design uses advanced ceramic elements and optimized heater control to improve light-off response and maintain accurate lambda measurement under thermal and vibration stress. This makes it a direct-fit choice for the 2001 Nissan Altima upstream application listed here. Bosch 15951 also cross-references 226905S511 for the same application.
What It Helps Address
- Incorrect air-fuel ratio readings sent to the ECU
- Delayed closed-loop fuel control after startup
- Emission-related drivability faults tied to sensor degradation
- Signal instability caused by heat and vibration exposure
Installation Notes
Verify the threaded mounting style, 18 mm thread size, 22 mm hex, and connector configuration before installation. This sensor is specific fit and listed for the upstream position on the 2001 Nissan Altima from 12/2000. Match the harness length and connector shape to the original sensor layout.
Quality Assurance
Bosch draws on more than five decades of OE oxygen sensor development, and the Actual OE Oxygen Sensor line reflects that OE-focused engineering approach.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2001 | Nissan | Altima | 2.4L | L4 | Upstream | From 12/2000; Actual OE Oxygen Sensor |
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