Diagnostic Adapter Scan Tool For Tesla Model 3 and Y 2019-2021 OBD2

Access Hidden Battery Data: Tesla Model 3 & Y Electric Drive Unit

Who Is This For? Designed specifically for Tesla Model 3 and Model Y owners (2019-2021) who want to monitor battery health, optimize charging efficiency, and troubleshoot their Electric Drive Unit like a professional technician.

The Proprietary Data Gap: Standard OBD2 ports are missing from the Tesla cabin, leaving owners in the dark regarding their vehicle’s true performance. You might see a range estimate on your screen, but you cannot see individual cell voltages, stator temperatures, or real-time energy conversion. Without this visibility, diagnosing range anxiety or monitoring battery degradation is nearly impossible for the average owner.

The Engineering Solution: This specialized diagnostic kit bridges the gap by tapping into the vehicle’s CANBUS system through the hidden console connector. We provide a precision-molded adapter cable and a high-speed OBD scan dongle that allows you to interface directly with the Tesla Electric Drive Unit. By translating the proprietary signal into a readable OBD2 format, this kit enables the use of advanced diagnostic software to verify charging efficiency and load sources.

The Comparative Edge: Why This Beats the Competition

• The Visibility Gain: Monitor real-time data including battery pack temperature, motor torque, and cell balancing—information the factory dash display hides from you.
• Engineered Precision: Unlike generic universal adapters that can have loose pins and cause CANBUS errors, our connectors are spec-matched to the Tesla 2019-2021 terminal housing for a secure, interference-free connection.
• The Proper Protocol: Specifically designed to work with the ScanMyTesla environment, ensuring high-speed data transfer rates without lagging or dropped connections during deep diagnostic sessions.

Technical Specifications & Factory Ratings

Compatibility & OEM Reference

Fits the Following Vehicles:

• Tesla Model 3 (Manufactured after Jan 2019, 2020, 2021)
• Tesla Model Y (2020, 2021)

Interchange Part Numbers:

TES-OBD2-ADPT-3Y, OBD2-SCAN-3Y-1921

Installation & Safety Note

To ensure a safe installation and restore full diagnostic visibility, the vehicle must be completely powered down. Access the center console beneath the rear ventilation nozzles. You will hear the HV contactor click when the vehicle has successfully switched off. If the contactor does not click, you must manually disconnect the HV loop and 12V system before inserting the adapter cable to protect the vehicle’s sensitive electronics.

The Performance Promise

Buy with confidence. This kit is designed for enthusiasts who demand transparency from their electric vehicle. Backed by real automotive experts and fast shipping.

Estimated gains; results vary by vehicle, engine, modifications, and conditions. See our dyno results.

Common Questions

Which Tesla models and years does this diagnostic adapter kit fit?
This kit fits 2019, 2020, and 2021 Tesla Model 3 vehicles manufactured after January 2019, as well as 2020 and 2021 Tesla Model Y vehicles.

Will this fit an earlier Tesla Model 3?
This adapter is built specifically for the 26-pin terminal housing introduced on Tesla Model 3 vehicles manufactured after January 2019.

What is included in the kit and what else is needed?
The kit includes the precision-molded CANBUS adapter cable and a high-speed OBD2 scan dongle. You will need to download the ScanMyTesla app separately on your device to view the data.

Where does the adapter cable plug into the vehicle?
It connects to the hidden 26-pin CANBUS harness located inside the rear of the center console beneath the rear ventilation nozzles.

Do I need to power down the vehicle before installing the cable?
Yes. The vehicle must be completely powered down until you hear the high-voltage (HV) contactor click off. If the contactor does not click, disconnect the HV loop and 12V system before plugging in the harness.