Tesla Model S / Tesla Model X 2021–2025 HV battery pyrofuse – 1523878-00-D

Pyrotechnic high-voltage fuse / pyrofuse for the main battery in the Tesla Model S and Model X Refresh/Plaid. The fuse acts as a pyrotechnic battery disconnect that can interrupt the connection to the high-voltage battery to isolate the HV system in a serious incident.

• OEM/part number: 1523878-00-D
• Type: High Voltage Pyrofuse / Pyrotechnic Battery Disconnect
• Position: main battery / HV battery pack
• Vehicle model: Tesla Model S Refresh/Plaid and Tesla Model X Refresh/Plaid, from approximately 2021
• Later revision: 1523878-00-E

Compatibility depends on the production date and battery/HV configuration. Always check the OEM number and preferably the VIN before ordering. This is a safety-critical high-voltage component and must be handled and installed by personnel with the appropriate high-voltage system expertise.