Genuine Audi A4 Voltage Regulator

Adjustable Voltage Regulator

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11 Voltage Regulators found

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Audi A4 Voltage Regulator Part Number: 038-903-803-F
$145.18 MSRP: $203.33
You Save: $58.15 (29%)
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Product Specifications
- Other Name: Regulator
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2000-2002 Audi A4 | Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 3.0 L GAS
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Audi A4 Voltage Regulator Part Number: 028-903-803-E
$145.18 MSRP: $203.33
You Save: $58.15 (29%)
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Product Specifications
- Other Name: Regulator
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 1997-2001 Audi A4 | Avant, Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
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Audi A4 Voltage Regulator Part Number: 06B-903-803-B
$300.46 MSRP: $420.82
You Save: $120.36 (29%)
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Product Specifications
- Other Name: Regulator
- Replaces: 03C-903-803, 06B-903-803-A, 5U0-903-803-A
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2003-2009 Audi A4 | Base, Cabriolet | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L GAS
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Audi A4 Voltage Regulator Part Number: 059-903-193-C
$14.84 MSRP: $19.78
You Save: $4.94 (25%)
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Product Specifications
- Other Name: Cap; Cover, Protect Cap, Rear Cap
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2006-2008 Audi A4 | Base | 6 Cyl 3.2 L GAS
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Audi A4 Voltage Regulator Part Number: 028-903-803-FX
$89.57 MSRP: $125.00
You Save: $35.43 (29%)
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Product Specifications
- Other Name: Regulator
- Replaces: 028-903-803-F
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 1996-2001 Audi A4 | Avant, Base | 6 Cyl 2.8 L GAS
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Audi A4 Voltage Regulator Part Number: 038-903-803-E
$105.01 MSRP: $147.07
You Save: $42.06 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Regulator
- Replaces: 038-903-803-EX
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2007-2009, 2002-2004 Audi A4 | Base, Cabriolet | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L GAS, 6 Cyl 3.0 L GAS
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Audi A4 Voltage Regulator Part Number: 06H-903-803-E
$188.01 MSRP: $263.31
You Save: $75.30 (29%)
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Product Specifications
- Other Name: Regulator
- Replaces: 06H-903-803-B
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2013-2016 Audi A4 | Base, Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
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Audi A4 Voltage Regulator Part Number: 028-903-803-DX
$548.15 MSRP: $767.72
You Save: $219.57 (29%)
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Product Specifications
- Other Name: Regulator
- Replaced by: 028-903-803-D
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 1996-2001 Audi A4 | Avant, Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
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Audi A4 Voltage Regulator Part Number: 059-903-803-N
$243.94 MSRP: $341.65
You Save: $97.71 (29%)
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Product Specifications
- Other Name: Regulator
- Replaces: 06E-903-803-S
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2013-2016 Audi A4 | Base, Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
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Audi A4 Voltage Regulator Part Number: 07K-903-803
$252.86 MSRP: $354.15
You Save: $101.29 (29%)
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Product Specifications
- Other Name: Regulator
- Replaces: 06E-903-803-F
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2009-2012 Audi A4 | Base | 4 Cyl 2.0 L GAS
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Audi A4 Voltage Regulator Part Number: 06E-903-803-M
$300.46 MSRP: $420.82
You Save: $120.36 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Regulator
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2006-2008 Audi A4 | Base | 6 Cyl 3.2 L GAS

Audi A4 Voltage Regulator

Audi A4 Voltage Regulator maintains the charging system steady between about 13.5 and 14.5 volts. It protects the battery and every onboard electronic. Renowned for its dependability, the Voltage Regulator monitors your battery's load. Based on this data, it adjusts the alternator's field current. This solid-state device switches up to 7,000 times per second. Consequently, voltage cannot drift high enough to bake wires or low enough to dim lights. The owners appreciate how this model protects expensive elements of Audi's luxury experience and dodges battery stress that cuts into its lifespan. The A4 line compatibility is for sedan and wagon variations, whether fitted with front wheel drive or Audi quattro all wheel drive. It works with engines from 1.6-liter inline four to 3.2-liter V6. The flexibility is impressive. Some older cars still use mechanical external units that do the same job as the Voltage Regulator but with contacts that chatter 200 times per second. Many people, however, like the integrated electronic type because they are tougher and the wiring is cleaner. As it continuously adjusts electrical output to match the electrical demand, it enhances fuel efficiency because the alternator never works harder than necessary. In addition, it improves safety by preventing sudden light outages at night. Audi's commitment to continuous service from the part also maintains the value of an A4 owner, showing how the Voltage Regulator quietly protects everyday motoring. It is capable of resisting heat and vibration effects along with moisture, and these traits have been proven on thousands of highway miles every day with winter starts as well. People who love cars view this small protector as necessary for reliability across the Audi range.

Choose original equipment manufacturer Voltage Regulator for great performance and strong durability. They use Audi's official craftsmanship and high-grade materials, and meet strict quality standards. Are you looking for quality Voltage Regulator at a good price? Come to our online store. We carry a wide range of genuine parts for your Audi A4 and the prices are competitive. Each part comes with the manufacturer's warranty. You can install with confidence and get steady results. Over time, you'll save money and avoid hassle. Keep your maintenance simple and protect your vehicle with OEM parts. Get the quality your A4 needs now.