How do Voltage Regulators function in the removal and inspection of the alternator and its components on Volkswagen Passat?

Take out the alternator and put it on a clean working surface with the pulley facing down. Take the retaining screws out, find the clips and remove the plastic cover on the rear of the alternator. Unscrew the screws on the voltage regulator/brush assembly and unattach the unit of the alternator. Check the length of the brush contact free and measure it against the given value; change the unit in case of worn-out below the minimum length used as a unit of measurement. Check the contact of the brush contacts on the end of the alternator shaft; and this can be slight but can be wiped with crocus cloth, but in cases where it is very dirty, has melted or pitted the alternator can be changed. The procedure of installation is in the opposite sequence of the one of removing, and when the alternator is installed, verify charging voltage.

Genuine Volkswagen Passat Voltage Regulators

Alternator Regulators

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8 Voltage Regulators found

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Volkswagen Passat Voltage Regulator Part Number: 028-903-803-FX
$89.57 MSRP: $125.00
You Save: $35.43 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Regulator
- Replaces: 028-903-803-F
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 1995-2001 Volkswagen Passat | 4 Motion, GLS, GLS 4 Motion, GLX, GLX 4 Motion, TDI | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
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Volkswagen Passat Voltage Regulator Part Number: 038-903-803-E
$105.01 MSRP: $147.07
You Save: $42.06 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Regulator; Voltage Regulator
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2001-2005 Volkswagen Passat | GL, GL TDI, GLS, GLS 4 Motion, GLS TDI, GLX, GLX 4 Motion, W8 | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L DIESEL, 6 Cyl 2.8 L GAS, 8 Cyl 4.0 L GAS
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Volkswagen Passat Voltage Regulator Part Number: 038-903-803-F
$145.18 MSRP: $203.33
You Save: $58.15 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Regulator
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2001-2005 Volkswagen Passat | GL, GLS, GLS 4 Motion | 4 Cyl 1.8 L GAS
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Volkswagen Passat Voltage Regulator Part Number: 03G-903-803
$199.91 MSRP: $279.99
You Save: $80.08 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Regulator
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2006-2008 Volkswagen Passat | 2.0T, 3.6, Komfort, Lux, Turbo, Value Edition, VR6, Wolfsburg Edition | 4 Cyl 2.0 L GAS, 6 Cyl 3.6 L GAS
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Volkswagen Passat Voltage Regulator Part Number: 078-903-803-D
$166.60 MSRP: $233.33
You Save: $66.73 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Regulator
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2002-2005 Volkswagen Passat | GL, GL TDI, GLS, GLS 4 Motion, GLS TDI, GLX, GLX 4 Motion, W8 | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L DIESEL, 6 Cyl 2.8 L GAS, 8 Cyl 4.0 L GAS
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Volkswagen Passat Voltage Regulator Part Number: 03L-903-803-A
$171.15 MSRP: $239.70
You Save: $68.55 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Regulator
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2012-2014 Volkswagen Passat | TDI SE, TDI SEL, TDI SEL Premium | 4 Cyl 2.0 L DIESEL
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Volkswagen Passat Voltage Regulator Part Number: 070-903-803-E
$237.99 MSRP: $333.32
You Save: $95.33 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Regulator
- Replaces: 070-903-803-B
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2001-2005 Volkswagen Passat | GL, GLS, GLS 4 Motion, GLX, GLX 4 Motion | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
View related parts
Volkswagen Passat Voltage Regulator Part Number: 028-903-803-DX
$221.33 MSRP: $309.99
You Save: $88.66 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Regulator; Voltage Regulator
- Replaced by: 028-903-803-D
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 1993-2001 Volkswagen Passat | 4 Motion, GL, GLS, GLS 4 Motion, GLX, GLX 4 Motion, TDI | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS

Volkswagen Passat Voltage Regulators

Choose OEM Voltage Regulators for superior quality and long-lasting durability. They match the Volkswagen's factory specifications exactly and pass strict quality control. If you plan to replace Voltage Regulators on your Passat, put OEM at the top of your list. You'll get the right fit, reliable performance, and peace of mind. We stock an extensive inventory of genuine Volkswagen Passat parts. It is easy to find what you need. You will love our competitive prices that help you save. No more hassle with returns or guesswork. Every part includes a warranty straight from the manufacturer. Get trusted quality, strong durability, and real value today.

Volkswagen Passat Voltage Regulators Parts and Q&A

Voltage Regulator
028-903-803-DX
Q: How do Voltage Regulators function in the removal and inspection of the alternator and its components on Volkswagen Passat?
A:
Take out the Alternator and put it on a clean working surface with the pulley facing down. Take the retaining screws out, find the clips and remove the plastic cover on the rear of the alternator. Unscrew the screws on the voltage regulator/brush assembly and unattach the unit of the alternator. Check the length of the brush contact free and measure it against the given value; change the unit in case of worn-out below the minimum length used as a unit of measurement. Check the contact of the brush contacts on the end of the alternator shaft; and this can be slight but can be wiped with crocus cloth, but in cases where it is very dirty, has melted or pitted the alternator can be changed. The procedure of installation is in the opposite sequence of the one of removing, and when the alternator is installed, verify charging voltage.