Pretty sure repair parts are only 12mo or the original warranty period whichever comes first. Once you modify your car IN ANY WAY you are in an adversarial relationship with tesla
Out of warranty MCUs come with a 4-year warranty: Vehicle Warranty
The Tesla Parts, Body & Paint Repair Limited Warranty begins on the purchase date of the part(s), and coverage extends for a period of 12 months. Specific categories of parts have unique warranty coverage periods:
For details, please review the Tesla Parts, Body & Paint Repair Limited Warranty.
- Sheet metal: Limited lifetime
- Drive Unit: 4 years or 50,000 miles, whichever comes first
- Vehicle High Voltage Battery: 4 years or 50,000 miles, whichever comes first
- Wall Connectors: 4 years
- Touchscreen and microcontroller unit: 4 years