Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Engine Starting System & Charging System (2.0L): General Description: Specification
| Item | Specifications | |||||
|---|---|---|---|---|---|---|
| Vehicle model | CVT | MT | ||||
| Starter | Type | Reduction type | ||||
| Model | M000T38571 | M000T33176 | ||||
| Manufacturer | Mitsubishi Electric | |||||
| Voltage and output | 12 V - 1.2 kW | 12 V - 1.0 kW | ||||
| Direction of rotation | Counter Clockwise (when observed from pinion) | |||||
| Number of pinion teeth | 9 | 8 | ||||
| No-load characteristics | Voltage | 11 V | ||||
| Current | 90 A or less | 95 A or less | ||||
| Generator | Type | Rotating-field three-phase type, voltage regulator built-in type, each with load response control system | ||||
| Model | A2TX5081 | |||||
| Manufacturer | Mitsubishi Electric | |||||
| Voltage and output | 12 V - 130 A | |||||
| Polarity on ground side | Negative | |||||
| Direction of rotation | Clockwise (when observed from pulley side) | |||||
| Stator connection | 3-phase Δ type | |||||
| Output current | 1, 500 r/min - 50 A or more 2, 500 r/min - 111 A or more 5, 000 r/min - 133 A or more | |||||
| Regulated voltage | 14.1 - 14.8 V [20°C (68°F)] | |||||
| Rotor slip ring outer diameter | Standard | 22.7 mm (0.894 in) | ||||
| Limit | 22.1 mm (0.870 in) | |||||
| Brush length | Standard | 22.5 mm (0.886 in) | ||||
| Limit | 5.0 mm (0.197 in) | |||||
| Battery | Type | 75D23L | ||||
| Nominal capacity | 5 HR: 53 Ah [25°C (77°F)] | |||||
| Nominal voltage | 12 V | |||||
| CCA | 470 A | |||||
| BCI group number(1) | 35 | |||||
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Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.