The alternator used in the Mitsubishi Lancer 10 (Lancer EX) and Proton Inspira 2.0 with the 4B11 engine is essentially the same unit, as both vehicles share a common Mitsubishi-sourced engine platform.

Alternator Description:

• Type: Internal Regulator, Internal Fan
• Voltage: 12V
• Amperage Output: Typically 110A to 130A depending on OEM specification
• Pulley Type: 6-Groove Serpentine Pulley
• Mounting: Direct bolt-on to 4B11 engine block
• OEM Part Numbers (may vary by market):
  
• Mitsubishi: A3TJ1891, A3TJ1891ZC, or A3TJ0091
• Proton: Matches Mitsubishi part numbers (Proton uses rebranded Mitsubishi parts)
• 
  

Interchangeability:

• The alternator is compatible across:
  
• Mitsubishi Lancer 10 2.0 (4B11)
• Proton Inspira 2.0
• Some Outlander and ASX models with 4B11
• 
  

Common Issues:

• Bearing noise after high mileage
• Voltage regulator failure leading to undercharging or overcharging
• Loose belt causing poor alternator performance

Would you like help identifying the exact OEM part number based on your car’s year or chassis number?