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Denso 234-4088 Oxygen Sensor - Upstream
| Brand | Denso 234-4088 |
|---|---|
| Position | Upstream |
| Wiring Harness Length | 25.51 |
| Sensor Type | Heated |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Connector Gender | Female |
| Thread Diameter | 0.708 |
| Mounting Type | Threaded |
| Product line | OE Style |
| Fits | BMW · 6 vehicles |
OE style replacement. Precision-built for exact replacement and a first-time fit.
Heated sensor. Helps support efficient engine performance and fuel economy.
Threaded mounting. Female connector and specific-fit design simplify installation.
Cross-references ACDelco 213-536, ACDelco 213-1336 and BMW 11781714772 for the same application. See all 13.
Denso OE Style Oxygen Sensor 234-4088
Denso 234-4088 is a heated, specific-fit oxygen sensor built to OE-style dimensions for direct replacement on select BMW applications. It is engineered for accurate exhaust feedback, stable engine management, and a first-time fit on compatible BMW 325i, 325is, 325iX, and 528e models.
Key Features
- OE Style replacement oxygen sensor from Denso
- Heated sensor design for faster operating readiness
- Specific fit for direct application matching
- 4-wire configuration with female connector
- Threaded mounting type with 0.708 in. thread diameter
- 25.51 in. wiring harness length for vehicle-specific routing
- Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination
Product Details
This Denso oxygen sensor is manufactured and tested to OE standards for consistent signal accuracy and dependable replacement performance. The OE Style line is built for exact fitment, and the Denso 234-4088 follows the original-style configuration needed for upstream exhaust monitoring on select BMW models. It is a direct-fit oxygen sensor for 1987-1988 BMW 325i, 1987-1988 BMW 325is, 1988 BMW 325iX, and 1988 BMW 528e, all in the upstream position.
This part cross-references Bosch 13038 and NTK 25540 for the same application.
Common Issues This Sensor Can Address
- Faulty oxygen sensor signal causing incorrect fuel trim
- Check engine light related to upstream sensor performance
- Reduced fuel economy from inaccurate exhaust feedback
- Rough idle or drivability concerns tied to sensor degradation
- Slow sensor response from contamination or age-related wear
Installation Notes and Tips
Verify the upstream location, connector style, wire count, and threaded mounting before installation. Confirm the vehicle is one of the listed BMW applications and match the harness routing to the original sensor path. Because this is a specific-fit sensor, correct application matching is important for proper installation and signal performance.
Quality Assurance
Denso manufactures this oxygen sensor to strict OE standards and tests each component for replacement accuracy and fit. The OE Style design and contamination-resistant trap layer support reliable operation in the exhaust stream on compatible BMW 325i, 325is, 325iX, and 528e applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1988 | BMW | 325i | Upstream | To 09/87; OE Style |
| 1988 | BMW | 325is | Upstream | To 09/87; OE Style |
| 1988 | BMW | 325iX | Upstream | To 09/87; OE Style |
| 1988 | BMW | 528e | Upstream | OE Style |
| 1987 | BMW | 325i | Upstream | To 09/87; OE Style |
| 1987 | BMW | 325is | Upstream | To 09/87; OE Style |
| No rows match your filter. | ||||