Description
Tesla Model 3 / Model Y
Battery Pyrofuse
OEM No: 1064689-00-J
High-Voltage Battery Safety Disconnect — Model 3 and Model Y
info What Is a Pyrofuse and What Does It Do?
A pyrofuse is a safety component that instantly cuts the connection between the high-voltage battery and the rest of an electric vehicle. In a collision or a serious electrical fault, the vehicle control system triggers it: a pyrotechnic charge fires and physically severs the high-voltage line.
This leaves no live current in the high-voltage cabling after an incident, reducing both the risk of fire and the risk of electric shock for first responders. It is a single-use component — once triggered it cannot be reused and must be replaced.
This product is a new replacement pyrofuse matching OEM number 1064689-00-J. Compatible vehicles and production ranges are listed in the table below.
warning Safety Warning — Qualified Personnel Required
- High-voltage systems carry a risk of fatal electric shock. This part must only be replaced by technicians trained and qualified to work on high-voltage systems.
- Before starting, the vehicle's high-voltage system must be disabled and discharged according to the manufacturer's procedure.
- It contains a pyrotechnic charge; protect it from impact, heat and static discharge, and follow the applicable handling and disposal rules.
- After replacement, remaining fault codes may need clearing and the high-voltage system checking, using a suitable diagnostic tool.
list_alt Technical Specifications
| Part Type | High-voltage battery pyrofuse |
| OEM Number | 1064689-00-J |
| Compatible Vehicles | Tesla Model 3 (2018.03 →) and Model Y (2023.02 →) — details below |
| Intended Use | Replacement / repair |
| Condition | New |
| Origin | Guangdong, China |
| Package Dimensions | 20 × 14 × 11 cm |
| Weight | 0.5 kg |
directions_car Vehicle Compatibility
| Model | Production | Drivetrain / Power |
|---|---|---|
| Model 3 | 2018.03 → | EV — 192 kW (261 PS) |
| Model 3 | 2018.06 → | EV AWD — 258 kW (351 PS) |
| Model 3 | 2019.02 → | EV AWD — 355 kW (482 PS) |
| Model 3 | 2019.03 → | EV AWD — 324 kW (441 PS) |
| Model 3 | 2019.06 → | EV AWD — 360 kW (490 PS) |
| Model 3 | 2019.12 → | EV — 239 kW (325 PS) |
| Model 3 | 2022.02 → | EV Performance AWD — 393 kW (534 PS) |
| Model Y | 2023.02 → | EV — 188 kW (256 PS) |
| Model Y | 2023.05 → | EV — 235 kW (320 PS) |
| Model Y | 2024.04 → | EV — 250 kW (340 PS) |
This list covers the main compatible variants. The part number fitted to your vehicle can differ by equipment level, so verify the number on your existing part before ordering.
help_outline Frequently Asked Questions
Why does a pyrofuse need replacing?
It is a single-use component. Once triggered after a collision or serious electrical fault, it permanently severs the high-voltage line and cannot be reused; the vehicle needs a new one before it can operate again.
Can I replace it myself?
No. Working on a high-voltage system requires specific training, equipment and procedures; incorrect handling can be fatal. Replacement must be carried out by a workshop qualified for high-voltage work.
How do I confirm it fits my car?
The deciding factor is the number on the existing part, not the vehicle model. Confirm that your part carries 1064689-00-J; if it shows a different number, get in touch with us.
Is anything required after replacement?
Usually yes. Remaining fault codes must be cleared and the high-voltage system checked, which requires a suitable diagnostic tool.
For availability, stock and pricing, get in touch with us. You can browse our EV diagnostic equipment under Electric Vehicle Equipment and Tesla-specific solutions in our Tesla category.
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