Standard Ignition D-50 Alternator Rectifier Set
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Standard Ignition

Standard Ignition D-50 Alternator Rectifier Set

Brand Standard Ignition D-50
Voltage 12
Fits Audi and Volkswagen · 7 vehicles

Alternator rectifier set. Restores proper charging-system diode function.

12-volt design. Matches standard electrical system requirements.

Cross-references Standard Ignition AC50, Standard Ignition D-50 and Standard Ignition SC522 for the same application. See all 6.

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Alternator Rectifier Set for 12V Charging Systems

Standard Ignition D-50 is a 12-volt alternator rectifier set for select Audi and Volkswagen charging systems. It is built for vehicles that need rectifier service in the alternator / generator circuit, including Audi 80, Audi 90, Audi 4000, Audi 4000 Quattro, and Volkswagen Golf applications.

  • 12-volt electrical specification
  • Alternator rectifier set for charging system repair
  • Fits select Audi and Volkswagen applications with OE-matched references
  • Cross-reference part numbers include AC50 and SC522
  • Standard Ignition part number D-50

Fitment Details

Fits 1988 Audi 80, N/A, OE No. 049 903 023K, L, R; 55 to 65 Amp. Fits 1988 Audi 90, N/A, OE No. 049 903 023K, L, R; 55 to 65 Amp. Fits 1986-1987 Audi 4000, N/A, OE No. 049 903 023K, L, R; 55 or 65 Amp. Fits 1986-1987 Audi 4000 Quattro, N/A, OE No. 049 903 023K, L, R; 55 or 65 Amp. Fits 1986 Volkswagen Golf, N/A, w/o AC; OE No. 04993023R.

What It Helps Repair

  • Charging output problems caused by rectifier failure
  • Battery warning light concerns tied to alternator diode issues
  • Low or unstable system voltage
  • Alternator electrical faults in Audi and Volkswagen charging systems
  • Repair needs on 12V alternator assemblies with OE-numbered applications

Installation Notes and Tips

Verify alternator OE number, amperage rating, and vehicle application before installation. Match the rectifier set to the alternator configuration listed for the vehicle, including the 55 to 65 amp Audi applications and the Volkswagen Golf without air conditioning. Confirm all electrical connections are clean and secure during service.

Quality Assurance

Standard Ignition supplies electrical service parts for charging and starting system repair. D-50 is identified for 12-volt applications and OE-referenced fitment across select Audi and Volkswagen models.

Related reading

This part fits 7 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
1988Audi802.0LL4N/AOE No. 049 903 023K, L, R; 55 to 65 Amp
1988Audi902.0LL4N/AOE No. 049 903 023K, L, R; 55 to 65 Amp
1987Audi4000——N/AOE No. 049 903 023K, L, R; 55 or 65 Amp
1987Audi4000 Quattro——N/AOE No. 049 903 023K, L, R; 55 or 65 Amp
1986Audi4000——N/AOE No. 049 903 023K, L, R; 55 or 65 Amp
1986Audi4000 Quattro——N/AOE No. 049 903 023K, L, R; 55 or 65 Amp
1986VolkswagenGolf——N/Aw/o AC; OE No. 04993023R
Directly replaces or cross-references 6 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Standard Ignition — AC50Standard Ignition — D-50Standard Ignition — SC52272GB10304AA049903359DO323