OEM numbers: 64539323658, 64 53 6 909 257, 64536909257, 64 53 9 323 658, 64539141957, 64530141211 Realtime pressure monitoring and alerts The sensor monitors the car air conditioning refrigerant pressure in real time and issues a warning when pressure is abnormal. This helps prevent damage to the A/C system and avoids performance degradation caused by abnormal pressure conditions. Durable metal construction Made of metal to ensure practicality and longlasting performance. The design is robust and not easy to damage, supporting reliable operation over time. Important compatibility and fit note Please read the description and pictures carefully to confirm the OEM part number of the sensor, especially the plug. The plug must be exactly the same, otherwise it will not match your vehicle. The listed OEM numbers are the supported options for this sensor. Use scenarios Daily driving: Realtime pressure monitoring provides early warning of pressure issues, reducing the risk of unexpected A/C failure. A/C service and maintenance: During refrigerant charging or system diagnostics, the sensor helps confirm safe pressure levels and protects the compressor. Workshop or fleet maintenance: Useful for quickly diagnosing A/C pressure problems across multiple vehicles and ensuring correct replacement parts.