5-Pin Waterproof MAF & Oxygen Sensor Connector for Bosch – OEM 1928403738 BSK
Direct OEM-specification replacement for the Bosch 5-way waterproof female connector, cross-referencing part number 1928403738 (BSK series). Engineered for mass airflow (MAF) sensor, oxygen (O2/lambda) sensor, and other Bosch sensor harness applications across European and Asian vehicle platforms.
| Attribute | Specification |
|---|---|
| OEM Part Number | 1928403738 (Bosch BSK series) |
| Pin Count | 5-Way |
| Gender | Female (socket) |
| Seal Type | Waterproof – sealed housing with wire seals |
| Housing Material | PA66 Nylon – heat and chemical resistant |
| Terminal Plating | Tin-plated copper, high-precision |
| Operating Voltage | 12V DC |
| Primary Application | MAF sensor, O2/lambda sensor, Bosch sensor harness |
The Bosch 1928403738 BSK connector is the OEM standard for 5-pin sensor harness connections across Volkswagen, Audi, BMW, Mercedes-Benz, and Opel/Vauxhall platforms. It is most commonly found on mass airflow (MAF) sensors, wideband oxygen sensors, and NOx sensors where a 5-circuit sealed connection is required in the high-temperature engine bay environment.
1 × 5-Way Female Connector Housing (1928403738 BSK) with wire leads and terminal inserts pre-installed.
Q: What sensors use the Bosch 1928403738 connector?
A: The 1928403738 BSK is used on Bosch MAF sensors (e.g., 0 280 218 series), wideband O2/lambda sensors (e.g., LSU 4.9), and NOx sensors across VW, Audi, BMW, and Mercedes platforms. Verify pin count and wire gauge against your sensor’s datasheet before installation.
Q: Is this connector compatible with aftermarket Bosch sensors?
A: Yes. The 1928403738 BSK is the OEM Bosch connector housing and is compatible with both genuine Bosch and OEM-equivalent aftermarket sensors using the same 5-pin BSK interface.
Q: What is the temperature rating of this connector?
A: The PA66 nylon housing is rated for continuous service from -40°C to +120°C, suitable for engine bay sensor harness applications near the intake manifold and exhaust system.
Q: How do I remove terminals from the Bosch BSK housing?
A: Use a Bosch-compatible terminal removal pick (1.0mm flat-blade). Insert alongside the terminal to depress the locking lance, then pull the wire rearward to extract without damaging the housing or wire seal.
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