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Bosch 13378 Oxygen Sensor - Upstream
| Brand | Bosch 13378 |
|---|---|
| Position | Upstream |
| Wiring Harness Length | 71.1 |
| Terminal Type | Blade |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 3 |
| Grade Type | Standard replacement |
| Connector Shape | Rectangle |
| Terminal Quantity | 4 |
| Connector Gender | Male |
| Terminal Gender | Male |
| Overall Length | 74.8 |
| 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) | 73.6 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 | Volvo · 2 vehicles |
OE direct replacement. Standard replacement oxygen sensor with specific fit and threaded mounting.
Heated narrow-band design. Provides faster light-off and quicker closed-loop operation.
OE-proven quality. Backed by Bosch's decades of oxygen sensor development.
Cross-references 9135793 and 9135795 for the same application. See all 2.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Bosch Actual OE Oxygen Sensor 13378
Bosch 13378 is a narrow-band heated oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management for the 1994-1995 Volvo 940 upstream application without Regina Fuel Injection System.
Key Features
- Specific-fit oxygen sensor for direct application matching
- Narrow-band heated design for faster closed-loop operation
- Threaded mounting with 18 mm thread diameter and 22 mm hex size
- 3-wire harness with included wiring harness and rectangular male connector
- Metal housing with high-temperature-resistant construction for demanding exhaust conditions
- OE-focused Bosch Actual OE Oxygen Sensor line for consistent sensor output
Product Details
This Bosch oxygen sensor uses advanced ceramic sensing elements and controlled heater operation to deliver accurate lambda feedback under changing load and temperature conditions. As part of the Bosch Actual OE Oxygen Sensor line, part number 13378 reflects Bosch’s long OE development history and its narrow-band sensor design approach for reliable upstream exhaust monitoring. It is a direct-fit replacement for the 1994-1995 Volvo 940 upstream position, without Regina Fuel Injection System, and it cross-references Bosch 13378 for the same application.
Common Issues It Can Help Address
- Rich or lean fuel trim caused by slow or inaccurate O2 sensor response
- Check engine light related to upstream oxygen sensor performance
- Rough idle or unstable combustion control from incorrect air-fuel feedback
- Increased exhaust emissions from degraded sensor output
- Delayed closed-loop operation after cold start
Installation Notes and Tips
Fits 1994-1995 Volvo 940, upstream, without Regina Fuel Injection System. Confirm the threaded mounting location, connector style, and harness routing before installation. Use the correct 18 mm oxygen sensor socket or wrench, and inspect the exhaust bung threads and sealing surface before tightening the sensor to specification.
Quality Assurance
Bosch supplies this sensor as an OE-focused replacement built from durable materials for heat and vibration resistance. The Actual OE Oxygen Sensor line is backed by Bosch’s extensive original-equipment development experience and is engineered to deliver consistent sensor behavior in demanding exhaust environments.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1995 | Volvo | 940 | 2.3L | L4 | Upstream | without Regina Fuel Injection System; Actual OE Oxygen Sensor |
| 1994 | Volvo | 940 | 2.3L | L4 | Upstream | without Regina Fuel Injection System; Actual OE Oxygen Sensor |
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