5-Pin MAF Air Flow Meter Sensor Connector – OEM 1928403146 | Bosch Multi-Brand
Direct OEM-specification replacement for the Bosch 5-pin MAF (Mass Air Flow) sensor connector. Cross-references Bosch part number 1928403146 (1 928 403 146). Used on Bosch hot-wire MAF sensors across VW, BMW, Ford, and Opel platforms. Available bare or with 15cm pre-wired leads.
| Pin | Function | Failure Symptom if Corroded |
|---|---|---|
| 1 | +12V power supply to MAF sensor | MAF sensor inactive, P0100 circuit malfunction |
| 2 | Ground (KL31) | MAF signal erratic, P0101 range/performance |
| 3 | MAF signal output to ECU (0–5V or frequency) | P0102 / P0103 — MAF circuit low/high |
| 4 | Intake air temperature (IAT) signal | P0110–P0113 — IAT circuit fault |
| 5 | IAT ground / signal return | Incorrect IAT reading, fuelling error |
| Attribute | Detail |
|---|---|
| Pin Count | 5-Pin |
| OEM Part Number | 1928403146 / 1 928 403 146 (Bosch) |
| Housing Material | High-temp nylon (PA66), waterproof sealed |
| Wire Option | Bare connector / 15cm pre-wired leads |
| Application | MAF / air flow meter sensor harness |
| Compatible Brands | VW, BMW, Ford, Opel / Vauxhall |
| Code | Description |
|---|---|
| P0100 | MAF sensor circuit — malfunction |
| P0101 | MAF sensor circuit — range/performance |
| P0102 | MAF sensor circuit — low input |
| P0103 | MAF sensor circuit — high input |
| P0110 | Intake air temperature sensor — circuit malfunction |
Q: My engine runs rough and has P0101 — is it the MAF connector?
A: P0101 (MAF range/performance) with rough running is frequently caused by a corroded 5-pin MAF connector rather than a failed MAF sensor. A corroded signal pin causes the ECU to receive an erratic airflow reading and miscalculate fuelling. Inspect the connector before replacing the MAF sensor.
Q: Are terminals included?
A: Yes, terminals are included with all variants.
Be the first to know about new collections and special offers.
5 Pin Connectors
