Tesla Model 3 Rear Drive Unit: Difference between revisions

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== External Documentation ==
== External Documentation ==
[[Tesla Model 3 Drive Unit PCB]]
[https://openinverter.org/forum/viewtopic.php?f=10&t=575 Tesla Model 3 Rear Drive Unit Hacking] (forum thread)
[https://openinverter.org/forum/viewtopic.php?f=10&t=575 Tesla Model 3 Rear Drive Unit Hacking] (forum thread)


https://github.com/damienmaguire/Tesla-Model-3-Drive-Unit (Hardware and reverse engineering details)
https://github.com/damienmaguire/Tesla-Model-3-Drive-Unit (Hardware and reverse engineering details)


https://github.com/jsphuebner/stm32-sine/tree/tesla-m3-gate-driver (STM32 "modboard" firmware dev. branch)
https://github.com/davefiddes/stm32-sine (STM32 replacement PCB firmware dev. branch)


==Part Numbers==
==Part Numbers==
Line 13: Line 15:
!Max Current
!Max Current
!Cars
!Cars
!
|-
|-
|1120970-00-F
|1120970-00-F
Line 18: Line 21:
|800A
|800A
|Model 3
|Model 3
|
|-
|-
|1120980-00-G
|1120980-00-G
Line 23: Line 27:
|800A
|800A
|Model 3 / Model Y
|Model 3 / Model Y
|"3D1"
|-
|-
|1120990-00-G
|1120990-00-G
Line 28: Line 33:
|600A
|600A
|Model 3 / Model Y
|Model 3 / Model Y
|
|-
|-
|1120990-00-H
|1120990-00-H
Line 33: Line 39:
|???A
|???A
|Model 3 / Model Y
|Model 3 / Model Y
|
|-
|-
|1120990-00-J
|1120990-00-J
Line 38: Line 45:
|???A
|???A
|Model 3 / Model Y
|Model 3 / Model Y
|"3D5"
|-
|-
|1521365-00-B
|1521365-00-B
Line 43: Line 51:
|800A
|800A
|Model 3 / Model Y
|Model 3 / Model Y
|
|-
|-
|1521487-00-A
|1521487-00-A
Line 48: Line 57:
|600A
|600A
|Model 3 / Model Y
|Model 3 / Model Y
|
|}
|}


Line 67: Line 77:
|30
|30
|Toyota 90980-12712 (Sumitomo 6189-6987)
|Toyota 90980-12712 (Sumitomo 6189-6987)
|
|https://prd.sws.co.jp/components/en/detail.php?number_s=61896987
https://www.aliexpress.com/item/1005005920568514.html
|-
|-
|?
|?
Line 224: Line 235:


== Oil specification ==
== Oil specification ==
There are two variants of rear drive unit in terms of oil. One where the oil is also inside the motor and one where it isn't. Where the gear oil is also inside the motor the oil will be black in colour. In this case FUCHS BluEV EDF 7005 oil is required, not using this oil will degrade the motor and cause failure in the long term.
There are two variants of rear drive unit in terms of oil. One where the oil is also inside the motor and one where it isn't. Where the gear oil is also inside the motor the oil will be black in colour. In this case FUCHS BluEV EDF 7005 oil is required, not using this oil will degrade the motor and cause failure in the long term. The oil filter is available as a BluePrint part number ADBP210139.
 
== Cooling ==
The drive unit has a water cooling loop which runs into the inverter then out and into a water/oil plate heat-exchanger before returning to the car. The system uses NW18 connectors. The cooling hoses supplied use the following:
 
{| class="wikitable"
|+
!Part No
!Description
|-
|FIP-NW18-90°-3
|90 degree fitting made from 66% Nylon/30% Glass Fibre
|-
|FIP-NW18-180°-1
|Straight fitting made from 66% Nylon/30% Glass Fibre
|}
 
A variety of confirmed compatible fittings can be purchase from https://www.aliexpress.com/item/1005007457411094.html in straight, 45 degree or 90 degree format as required.


[[Category:Tesla]]
[[Category:Tesla]]

Latest revision as of 19:07, 18 November 2025

External Documentation

Tesla Model 3 Drive Unit PCB

Tesla Model 3 Rear Drive Unit Hacking (forum thread)

https://github.com/damienmaguire/Tesla-Model-3-Drive-Unit (Hardware and reverse engineering details)

https://github.com/davefiddes/stm32-sine (STM32 replacement PCB firmware dev. branch)

Part Numbers

Part Number Description Max Current Cars
1120970-00-F (ASY,M3,3DU,REAR,IGBT) - original RWD and/or "binned" Perf 800A Model 3
1120980-00-G (ASY,M3,REAR 3DU,MOSFET,GLOBAL) - early AWD motor 800A Model 3 / Model Y "3D1"
1120990-00-G (ASY,M3,REAR,MOSFET-LC,GLOBAL) - newer AWD motor 600A Model 3 / Model Y
1120990-00-H (ASY,M3,REAR,MOSFET-LC,GLOBAL) - newer AWD motor 2021 with few hints on it's actual existence ([2]) ???A Model 3 / Model Y
1120990-00-J (ASY,M3,REAR,MOSFET-LC,GLOBAL) - current (Jan 2022) AWD (EPC [3]) ???A Model 3 / Model Y "3D5"
1521365-00-B (ASY, REMAN, 3DU-Rear 800 MOSFET) - Remanufactured 1120980-00-G 800A Model 3 / Model Y
1521487-00-A (ASY, REMAN, 3DU-REAR 630 MOSFET) - Remanufactured 1120990-00-G 600A Model 3 / Model Y

[1] Details from https://www.reddit.com/r/teslamotors/comments/ioat3d/rear_motor_efficiency_improvements_980_vs_990/.
[2] https://www.ebay.de/itm/185026392386
[3] https://epc.tesla.com/en/catalogs/138/categories/10030/subcategories/42427

Connectors and Pinouts

Label Description Pins Compatible Plugs Link
X090 Inverter connector 30 Toyota 90980-12712 (Sumitomo 6189-6987) https://prd.sws.co.jp/components/en/detail.php?number_s=61896987

https://www.aliexpress.com/item/1005005920568514.html

? Rotor Shaft Resolver 10 (8 connected) TE Connectivity 1-2282337-1
? Oil Pump 3 TE Connectivity 1-1718644-1
? HV connector 2 TE Connectivity HC-STAK 90° 2840900-1 TE Product Application

Power Figures

Taken from tesla:

RWD Variant

Voltage: 350v

Max Power: 239 KW @ 5525 rpm

Max Torque: 420 nm @ 325-5200 rpm

AWD Variant

Voltage: 335v

Max Power: 203 KW @ 6700 rpm

Max Torque: 330 nm @ 325-5200 rpm

Performance Variant

Voltage: 320v

Max Power: 219 KW @ 5075 rpm

Max Torque: 420 nm @ 325-4800 rpm

Mechanical Specification

Max rotor speed: 18,447 rpm

Input shaft gear: 31 teeth

Counter shaft input: 81 teeth

Counter shaft output: 24 teeth

Ring gear: 83 teeth

Gearbox Ratio: (81/31) * (83/24) = 9.036

Weight: 80 kg

Dimensions approx: 676 x 554 x 353 mm

Details from https://www.youtube.com/watch?v=SRUrB7ruh-8 & https://eveurope.eu/en/product/tesla-model-3-rwd-drive-kit.

Inverter Components

Manufacturer Part No Description Quantity Datasheet
ST ST GK026 SiC FET drive transistors 24 https://www.st.com/en/power-transistors/sctw100n65g2ag.html (?)
ST STGAP1AS Gate Drivers 6 https://www.st.com/en/power-management/stgap1as.html
ST STD46P4LLF6 P-channel Power MOSFET 40V 6 https://www.st.com/en/power-transistors/std46p4llf6.html
Infineon 3N0408 N-channel Power Transistor 6
TI TMS320F28377DPTPQ C2000 Delfino MCU 1 TMS320F2837xD Dual-Core Microcontrollers Datasheet

TMS320F2837xD Dual-Core Microcontrollers Technical Reference Manual

On Semi TCA0372BDW Resolver amplifier 1 https://www.onsemi.com/pdf/datasheet/tca0372-d.pdf
TI LMV844 Temperature sensor amplifier 1 https://www.ti.com/lit/gpn/lmv844
Microchip 25LC256E EEPROM 1 http://ww1.microchip.com/downloads/en/DeviceDoc/20005715A.pdf
TI SN65HVD1040A CAN Transceiver 2 https://www.ti.com/lit/ds/symlink/sn65hvd1040a-q1.pdf
NXP TJA1021 LIN Transceiver 1 https://www.nxp.com/docs/en/data-sheet/TJA1021.pdf
Broadcom ACPL-C87BT-000E DC HV sense 1 https://docs.broadcom.com/docs/AV02-3564EN
Infineon TLF35584QVVS2 DC-DC Power and system watchdog 1 https://uk.farnell.com/infineon/tlf35584qvvs1xuma2/multi-volt-pwr-supply-ic-40-to/dp/3155085
TDK VGT22EPC-222S6A12 DC-DC Transformer (gate drive?) 1 https://product.tdk.com/en/search/transformer/transformer/gate-drive/info?part_no=VGT22EPC-200S6A12

Details from https://www.youtube.com/watch?v=l6dV2re3rtM.


Oil specification

There are two variants of rear drive unit in terms of oil. One where the oil is also inside the motor and one where it isn't. Where the gear oil is also inside the motor the oil will be black in colour. In this case FUCHS BluEV EDF 7005 oil is required, not using this oil will degrade the motor and cause failure in the long term. The oil filter is available as a BluePrint part number ADBP210139.

Cooling

The drive unit has a water cooling loop which runs into the inverter then out and into a water/oil plate heat-exchanger before returning to the car. The system uses NW18 connectors. The cooling hoses supplied use the following:

Part No Description
FIP-NW18-90°-3 90 degree fitting made from 66% Nylon/30% Glass Fibre
FIP-NW18-180°-1 Straight fitting made from 66% Nylon/30% Glass Fibre

A variety of confirmed compatible fittings can be purchase from https://www.aliexpress.com/item/1005007457411094.html in straight, 45 degree or 90 degree format as required.

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