12321711399 Hella Voltage Regulator
Click the image to expand

Hella Voltage Regulator | 12321711399

Audi, BMW, Mercedes, VW
$12.89
Reg
$13.43
List
$205.11
In Stock Status
In Stock Information Icon
Leaves warehouse within 1-2 business days.
Loading...

Make Sure It Fits

P/N: 12321711399 Hella
Description:
1 per car.
Cross References:
  • 0021545806
  • 0021547206
  • 004241151
  • 1197311028
  • 12311726022
  • HL0021545806
  • HL0021547206
  • W01331623408
  • W01331634960
  • W01331635481

Voltage regulators maintain a constant range of alternator voltage output and convert the alternate current (AC) produced by the alternator into the direct current (DC) the vehicle operates on. As the alternator turns, it uses coil windings and magnets to create the alternate current. The faster the alternator turns, the more current and voltage is produced. The voltage regulator uses diodes to convert the AC to DC, limiting the alternator's voltage output to 12-14 volts.

Voltage regulators fail when they can no longer convert alternate current to direct current or when they can no longer maintain a consistent voltage that the vehicle requires to operate.

Signs of a faulty voltage regulator include:
  • Surging lights
  • Flickering interior lights
  • Instrument cluster or panel malfunctioning
  • Battery light or check engine light illuminated
  • A battery not being charged

Checking battery voltage or alternator output are simple ways to test a voltage regulator. Fluctuating battery voltage or drops in alternator output when the engine is at idle indicates the voltage regulator has failed and is not regulating voltage or not converting alternate current to direct current.

Replacing Your Vehicle's Voltage Regulator

Some voltage regulators are external to the alternator and can be removed and replaced in series with the alternator output circuit. Other voltage regulators are mounted inside of the alternator and may be removable and replaceable, but some will require the replacement of the alternator to replace the voltage regulator.

View more Hella Voltage Regulators.

Hella has become synonymous with offroad lighting and foglights but is also an OEM supplier of headlights and electrical parts.
Left = Driver side and Right = Passenger side.
All parts are priced individually unless identified as a set or kit. "Per car" notes identify how many of a given part your car has and "Left/Right or Front/Rear" notes means the part fits the left or right side of the car. These parts are still sold individually and you'll need to select the appropriate quantity if you plan to replace more than one of this item.

Frequently Viewed Together

We found 10 additional part(s) that are frequently viewed together.

Why Buy OEM & Genuine Replacement Auto Parts from AutohausAZ?

Auto parts at wholesale prices is what you will find at AutohausAZ. Have you been searching the web for auto parts for your vehicle? You have come to the right place! Here at Autohaus, we strive to offer low prices on quality replacement parts and providing first rate customer service.

What This Hella Voltage Regulator Fits?

Application information below is for reference only and should not be used to determine the exact vehicle fitment. Please use the "Make Sure It Fits" vehicle selection box above to determine the exact fitment and review any application notes. If you need any help determining if this part works with your vehicle, please don't hesitate to contact us.

Audi
89-91 - 200
81-87 - 4000 Base, S
85-87 - 4000 Quattro CS, S
82-88 - 5000 Base, CS, S, S Turbo, Turbo
86-88 - 5000 Quattro CS
88-92 - 80
88-92 - 80 Quattro
88-91 - 90
88-91 - 90 Quattro Base, 20v
81-87 - Coupe Base, GT
73-79 - Fox
71-72 - Super 90
BMW
84-85 - 318i
77-83 - 320i
87-88 - 325
84-87 - 325e
87-95 - 325i E30, E36
87-95 - 325iC E30
87-95 - 325is E30, E36
88-91 - 325iX E30
85-86 - 524td
91-95 - 525i
82-88 - 528e
83-84 - 533i
85-93 - 535i
88-88 - 535is
77-77 - 630CSi
78-84 - 633CSi
85-89 - 635CSi
78-84 - 733i
85-92 - 735i
Mercedes
84-89 - 190D 2.2, 2.5, 2.5 Turbo
84-93 - 190E 2.3, 2.3-16, 2.6
87-93 - 190E 2.3
thru engine # 040723; Transmission Control Type: Manual
thru engine # 089215; Transmission Control Type: Automatic
77-78 - 230
74-76 - 230
from chassis # 033476
77-83 - 240D
74-76 - 240D
from chassis # 056706
87-89 - 260E
73-76 - 280
73-76 - 280C
78-81 - 280CE
77-81 - 280E
75-76 - 280S
77-80 - 280SE
78-81 - 300CD
82-85 - 300CDT
88-92 - 300CE
75-93 - 300D Base, 2.5
82-87 - 300DT
VW
90-92 - Corrado
87-93 - Fox Base, GL, GL Sport
85-92 - Golf Base, Custom, GL, GT, GTI & more
81-91 - Jetta Base, Deluxe, GL, GLI, Sport & more
90-93 - Passat Base, CL, GL, GLS
82-88 - Quantum Base, DLX, GL, GL Deluxe TDI, Syncro
83-84 - Rabbit Base, GTI, GTI Sport, LS Custom
82-84 - Rabbit Convertible
82-88 - Scirocco Base, 16-Valve, DLX
81-92 - Vanagon Base, Diesel, GL, Syncro