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2002 Audi A4
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2002 Audi A4

2002 Audi A4 Voltage Regulators

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Voltage Regulator - Replaces OE Number 038903803E
Vemo®
Voltage Regulator - Replaces OE Number 038903803E
Part Number: Z8YV10770014
Guaranteed to Fit
$37.99
Vehicle Fitment
  • 2002 Audi A4 Base 4 Cyl 1.8L Slipring 14 mm; Voltage: 14,5 V; With OE No. 0004320637
Product Details
Warranty : 24-month or 24,000-mile Vemo limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : European Vehicle PartsInterchange Part Number : 038903803, 038903803B, 038903803E, 038903803EX, 77364088, 42533813, 42534878, 42553814, 42559751, 0001543205, 0001543705, 0031542406, 0031545306, 0031549706, 0121542702, 0131548302, 013154830280, 013154830287, 013154830288, A0001543205, A0001543705, A0031542406, A0031545306, A0121542702, A0131548302, A013154830280, 24436554, 00004320637, 4320637, 95560301700, 95560391701, 99660301200, 99660301201, 99660301202, 99660301203, 99660301204, 99660301205, 99660301206, 5001850026, 038903803AReplaces OE Number : 038903803, 038903803B, 038903803E, 038903803EX, 77364088, 42533813, 42534878, 42553814, 42559751, 0001543205, 0001543705, 0031542406, 0031545306, 0031549706, 0121542702, 0131548302, 013154830280, 013154830287, 013154830288, A0001543205, A0001543705, A0031542406, A0031545306, A0121542702, A0131548302, A013154830280, 24436554, 00004320637, 4320637, 95560301700, 95560391701, 99660301200, 99660301201, 99660301202, 99660301203, 99660301204, 99660301205, 99660301206, 5001850026, 038903803ARecommended Use : OE ReplacementProduct Fit : Direct Fit
Voltage Regulator - Sold individually
WAI®
Voltage Regulator - Sold individually
Part Number: WAIM547
Guaranteed to Fit
$30.99
Vehicle Fitment
  • 2002 Audi A4 Base 4 Cyl 1.8L
Product Details
Warranty : WAI limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Voltage Regulator - Direct Fit
Hitachi®
Voltage Regulator - Direct Fit
Part Number: HITALR0570
Guaranteed to Fit
$52.49
Vehicle Fitment
  • 2002 Audi A4 Base 6 Cyl 3.0L To Vin 8D-2-010 000
  • 2002 Audi A4 Base 4 Cyl 1.8L To Vin 8D-2-010 000
Product Details
Warranty : 24-month or 24,000-mile limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : OE ReplacementProduct Fit : Direct Fit
Voltage Regulator - Direct Fit
Hitachi®
Voltage Regulator - Direct Fit
Part Number: HITALR0573
Guaranteed to Fit
$69.49
Vehicle Fitment
  • 2002 Audi A4 Base 6 Cyl 3.0L From Vin 8E-2-000 001
  • 2002 Audi A4 Base 4 Cyl 1.8L From Vin 8E-2-000 001
Product Details
Warranty : 24-month or 24,000-mile limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : OE ReplacementProduct Fit : Direct Fit
Voltage Regulator - Replaces OE Number 078 903 803 D
Vemo®
Voltage Regulator - Replaces OE Number 078 903 803 D
Part Number: Z8YV10771017
Guaranteed to Fit
$88.49
Vehicle Fitment
  • 2002 Audi A4 Base 6 Cyl 3.0L Aftermarket Grade
Product Details
Warranty : 24-month or 24,000-mile Vemo limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : European Vehicle PartsInterchange Part Number : 06C903016BX, 074903018PX, 078903016R, 078903016RX, 078903016S, 078903803D, 78903803D, 06C903016B, 6C903016BX, 6C903016B, 74903018PX, 78903016RX, 78903016R, 78903016SReplaces OE Number : 06C903016BX, 074903018PX, 078903016R, 078903016RX, 078903016S, 078903803D, 78903803D, 06C903016B, 6C903016BX, 6C903016B, 74903018PX, 78903016RX, 78903016R, 78903016S
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Helpful Automotive Resources

Where is the Voltage Regulator Located on an Alternator?
Where is the Voltage Regulator Located on an Alternator?To access the voltage regulator, all you need to do is park your vehicle, disconnect the car battery, and check the engine compartment. It’s helpful to look up the voltage regulator for your vehicle on CarParts.com so you can determine what it looks like. .kadence-column_d10526-07 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_d10526-07 > .kt-inside-inner-col,.kadence-column_d10526-07 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column_d10526-07
Why Is My Battery Light On?
Why Is My Battery Light On?It’s normal to see the “battery icon” illuminated when you start your car. But if the battery light came on again while you were driving, that’s a different story. Here are the possible reasons why your battery light is on: It’s normal to see the “battery icon” illuminated when you start
Why Won’t My Car Start?
Why Won’t My Car Start?Automotive professionals break down no-start situations into two separate categories: crank-no-start and no-crank-no-start.
Alternator Voltage Regulation 101 (with Wiring Diagrams)
Alternator Voltage Regulation 101 (with Wiring Diagrams)As most people know, the alternator charges the battery whenever the engine is running while also supplying electricity to the car’s electronics. The alternator accomplishes these tasks through electromagnetic induction—a phenomenon that generates electrical current from a magnetic field. The alternator’s stator (background), rotor (center), and rectifier (foreground).
Bad Voltage Regulator: Symptoms, Testing, Replacement Cost & More
Bad Voltage Regulator: Symptoms, Testing, Replacement Cost & MoreAs most people know, the alternator charges the battery (whenever the engine is running) while also supplying electricity to the car’s electronics. The alternator accomplishes these tasks through electromagnetic induction—a phenomenon that generates electrical current from a magnetic field. The voltage regulator controls the amount of current that flows through the
P2503 Code: Charging System Voltage Low
P2503 Code: Charging System Voltage LowCode P2503 is set once the PCM detects that the alternator output is less than the target charging voltage during engine operation.