Tesla Model S Onboard Charger – Gen 2 (1014963-00-xx)
Fits later Tesla Model S vehicles equipped with the second-generation onboard charger stack (roughly mid-2014 and newer, build-date dependent). Always confirm part number 1014963-00-xx and revision letter on your original unit or in the Tesla EPC before ordering.
The onboard charger (OBC) converts AC power from your wall connector or public EVSE into high-voltage DC for the main traction battery. This listing is for an OEM Gen 2 Tesla Model S onboard charger, part family 1014963-00-xx, used in later Model S vehicles with the updated charger stack architecture.
Units are sourced from donor vehicles, cleaned, visually inspected, and function-checked before shipment. Ideal as a direct replacement when your existing Gen 2 charger has failed and is logging AC charging faults, reduced charge rates, or refusing to start a charge session.
Why these fail
- Thermal cycling in daily use – High-current AC charging warms power electronics and control boards, slowly stressing solder joints and components.
- Coolant and moisture issues – Leaks, condensation, or compromised seals can allow coolant or moisture to reach sensitive circuitry and cause corrosion.
- Line transients and poor power quality – Voltage spikes, brownouts, or miswired EVSEs can damage input stages and EMI filtering.
- Aging components – Over time, electrolytic capacitors and other wear-out parts drift out of spec and trigger charger-related fault codes.
- Prolonged operation with faults – Ignoring intermittent AC charging problems can lead to secondary damage in the HV junction box and connectors.
Our solution
- Genuine Tesla hardware – OEM 1014963-00-xx Gen 2 charger module, not an aftermarket substitute.
- Cleaned and inspected – Mounting points, HV/low-voltage connectors, and coolant ports are checked before shipment.
- Known-good replacement – Intended as a like-for-like swap for failed Gen 2 onboard chargers in later Model S vehicles.
- Backed by Gruber – Sold by a shop that specializes in Tesla and EV power electronics, with technical support available.
- Ideal for service centers – A solid option for independent EV shops and fleet operators needing a tested spare on the shelf.
| Tesla Part Number |
Onboard Charger – Gen 2 1014963-00-xx (various suffix revisions) |
| Vehicle application |
Later Tesla Model S equipped with the second-generation charger stack; not intended for vehicles originally built with Gen 1 chargers without additional harness/HVJB changes |
| Function |
Converts AC input from Level 1/Level 2 EVSE into high-voltage DC for the traction battery |
| Charger generation |
Second-generation sealed onboard charger used in later Model S charger stacks |
| Approximate output |
Up to ~10 kW AC charging capability per module (vehicle-configuration dependent) |
| Condition |
Pre-owned OEM unit, cleaned and inspected; normal cosmetic wear from prior service is expected |
| Warranty |
Limited 90-day replacement warranty from ship date (contact us if your application requires different terms) |
Service & coverage
Installation of high-voltage components should only be performed by technicians trained on EV safety and Tesla procedures. If you are unsure about charger generation, build date, or compatibility with your HV junction box and harnessing, contact us with your VIN and existing part number before ordering so we can help verify fitment.
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Maintenance tip:
If the car will DC fast-charge (Supercharge) but refuses AC charging, shows reduced AC charge rates, or frequently aborts sessions with “Charging error” messages, the onboard charger or related HVJB wiring may be at fault. Address these symptoms early to avoid collateral damage to connectors and contactors.
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Need help confirming this is the right charger?
Contact Gruber for pre-sales technical support and charger stack compatibility questions:
480-921-8000 or use the contact form on our website with your VIN and a photo of your existing charger label.
