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MG620055 / MG610056 / 6240-5101 / 7122-1300 / 7123-1300 Automotive 10-Pin Connector — Toyota F3/F0 / BYD G3 / MG Tail Socket
MG620055 / MG610056 / 6240-5101 / 7122-1300 / 7123-1300 Automotive 10-Pin Connector Toyota F3/F0 / BYD G3 / MG Tail Socket
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MG620055 / MG610056 / 6240-5101 / 7122-1300 / 7123-1300 Automotive 10-Pin Connector — Toyota / BYD / MG
The MG620055, MG610056, 6240-5101, 7122-1300, and 7123-1300 are 10-pin automotive connector housings used in Toyota F3/F0, BYD G3, and MG vehicle wiring harness applications. This connector family is notable for its cross-platform use across Japanese (Toyota), Chinese domestic (BYD), and British-heritage Chinese (MG) vehicle brands — reflecting the shared connector standards adopted by Chinese OEMs that license or co-develop platforms with Japanese manufacturers.
The MG620055/MG610056 are KET (Korea Electric Terminal) part numbers; the 6240-5101, 7122-1300, and 7123-1300 are Toyota/Sumitomo cross-references for the same connector system. The 10-pin tail socket configuration is used for rear lighting, tail lamp assembly, and body control module wiring harness connections on these platforms.
Key Specifications
| Parameter | Value |
|---|---|
| Part Numbers | MG620055 / MG610056 / 6240-5101 / 7122-1300 / 7123-1300 |
| Pin Count | 10-pin |
| Application | Tail lamp / rear lighting / BCM socket |
| Sealing | Unsealed |
| Housing Material | PA66 glass-filled nylon |
| Terminal Material | Tin-plated copper alloy |
| Operating Temperature | -40°C to +85°C |
| Compatible Platforms | Toyota F3/F0, BYD G3, MG (KET/Sumitomo harness) |
| Compliance | RoHS |
Cross-Platform Connector Compatibility
| Part Number | Platform | Manufacturer |
|---|---|---|
| MG620055 (female) / MG610056 (male) | Hyundai/KIA, MG | KET |
| 6240-5101 | Toyota F3/F0 | Sumitomo |
| 7122-1300 (female) / 7123-1300 (male) | Toyota, BYD G3 | Sumitomo/KET |
Tail Lamp Connector — Common Failure Modes
- Moisture ingress from boot/trunk seal failure — tail lamp connectors are located in the boot/trunk area; a failed boot seal allows water to pool around the connector and cause terminal corrosion
- LED tail lamp driver faults — on vehicles with LED tail lamps, a corroded connector terminal causes LED driver faults and tail lamp warning lights
- Intermittent tail lamp operation — a loose or corroded terminal causes intermittent tail lamp, brake light, or turn signal operation — a safety issue that requires prompt repair
- Cross-platform parts availability — the multiple cross-references for this connector ensure parts availability across Toyota, BYD, and MG dealer networks and aftermarket suppliers
Frequently Asked Questions
Q: Which Toyota models use the 6240-5101 / 7122-1300 connector?
The 6240-5101 and 7122-1300 are used in Toyota F3 (Corolla EX in China) and F0 (Yaris in China) tail lamp and rear body wiring harness applications. These models are produced by FAW-Toyota and Guangzhou-Toyota joint ventures for the Chinese market. Consult the Toyota EPC with your vehicle’s VIN to confirm the exact connector part number for your specific model and year.
Q: Why does BYD G3 use the same connector as Toyota?
BYD (Build Your Dreams) licensed Toyota platform technology for the G3 model and adopted Toyota’s wiring harness connector standards as part of the technology transfer. This is common practice in the Chinese automotive industry — Chinese OEMs that license or co-develop platforms with Japanese manufacturers often adopt the Japanese OEM’s connector standards, resulting in cross-platform parts compatibility that simplifies aftermarket supply.
Q: How do I diagnose a tail lamp connector fault vs a failed LED module?
Disconnect the tail lamp connector and inspect all 10 terminals for corrosion. Use a multimeter to check for battery voltage at the power supply terminal (with tail lamp switch on) and continuity on the ground terminal. If voltage and ground are present but the tail lamp does not illuminate, the LED driver module may be faulty. If voltage or ground is absent, the fault is in the connector, wiring, or BCM output circuit. A scan tool can also check for B-code DTCs related to the tail lamp circuit.
