What precautions should be taken when disconnecting the battery equipped with an alternator and an anti-theft radio on Volkswagen Passat?

These models come with anti-theft radio, therefore, have the activation code prior to the battery disconnection. The battery disconnection may cause driveability problems, which may be fixed with the help of the scan tool and it may also provoke a warning light on the instrument panel, which should be switched off with the help of the scan tool. The majority of publicly available scan tools do not have the facilities to complete such functions and as such a visit to an appropriate dealer service department or a properly equipped repair facility can be required following service work. Start by detaching the negative battery cable then proceed to detach the engine cover and splash shield. Removing the air intake duct and alternator drivebelt, removing the engine cooling fan, disconnecting the wire terminals to the alternator, and removing the alternator mounting bolts are steps that one has to follow to remove it on four-cylinder models. In the V6 models, loosen the front end/radiator support by making it lie in service position, loosen the alternator drivebelt and the refrigerant line clamp, disconnection of starter/alternator wiring harness, alternate removal of coolant duct at the alternator, then loosen the alternator mounting bolts. In case changing the alternator, carry the old one so that the new or re-manufactured one will be the same in terms of looks, arrangement of terminals and identification numbers. Note that lots of new or rebuilt alternators do not include a pulley, and therefore ensure the store policy on pulley installation. The reverse sequence of the removal procedure involves installation with ensuring tightening the mounting bolts to the required torque and provision of the drivebelt. Lastly, test the charging voltage to make sure that the alternator is working.

Genuine Volkswagen Passat Alternator

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36 Alternators found

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Volkswagen Passat Alternator Part Number: 06F-903-023-R
$192.77 MSRP: $249.22
You Save: $56.45 (23%)
Ships in 1-2 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2016-2018 Volkswagen Passat | GT, SE, SEL Premium | 6 Cyl 3.6 L GAS
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Volkswagen Passat Alternator Part Number: 028-903-025-H
$352.76 MSRP: $444.85
You Save: $92.09 (21%)
Ships in 1-2 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 1993-1994 Volkswagen Passat | GL, GLX | 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
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Volkswagen Passat Alternator Part Number: 06K-903-026-C
$405.64 MSRP: $511.53
You Save: $105.89 (21%)
Ships in 1-2 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2020-2022 Volkswagen Passat | Limited Edition, R-Line, S, SE, SEL | 4 Cyl 2.0 L GAS
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Volkswagen Passat Alternator Part Number: 028-903-018-CX
$345.40 MSRP: $432.91
You Save: $87.51 (21%)
Ships in 1-2 Business Days
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Product Specifications
- Replaces: 028-903-018-C, 028-903-025-RX
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 1993-1997 Volkswagen Passat | GL, GLS, GLX | 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
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Volkswagen Passat Alternator Part Number: 074-903-018-PX
$405.75 MSRP: $507.69
You Save: $101.94 (21%)
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Product Specifications
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2004-2005 Volkswagen Passat | GL TDI, GLS TDI | 4 Cyl 2.0 L DIESEL
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Volkswagen Passat Alternator Part Number: 058-903-018-BX
$480.54 MSRP: $602.00
You Save: $121.46 (21%)
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Product Specifications
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 1998-2001 Volkswagen Passat | GLS, GLX | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
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Volkswagen Passat Alternator Part Number: 04L-903-023-A
$652.69 MSRP: $823.06
You Save: $170.37 (21%)
Ships in 1-2 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2015 Volkswagen Passat | TDI SE, TDI SEL Premium | 4 Cyl 2.0 L DIESEL
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Volkswagen Passat Alternator Part Number: 028-903-031
$667.38 MSRP: $841.58
You Save: $174.20 (21%)
Ships in 1-2 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2004-2005 Volkswagen Passat | GL TDI, GLS TDI | 4 Cyl 2.0 L DIESEL
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Volkswagen Passat Alternator Part Number: 028-903-029-R
$674.05 MSRP: $850.00
You Save: $175.95 (21%)
Ships in 1-2 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2004-2005 Volkswagen Passat | GL TDI, GLS TDI | 4 Cyl 2.0 L DIESEL
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Volkswagen Passat Alternator Part Number: 028-903-018-AX
$480.26 MSRP: $600.32
You Save: $120.06 (20%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaces: 028-903-025-QX, 028-903-018-A
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 1993-1997 Volkswagen Passat | GL, GLX | 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
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Volkswagen Passat Alternator Part Number: 038-903-018-EX
$486.09 MSRP: $607.67
You Save: $121.58 (21%)
Ships in 1-2 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2000-2005 Volkswagen Passat | 4 Motion, GL, GLS, GLS 4 Motion, GLX, GLX 4 Motion, W8 | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS, 8 Cyl 4.0 L GAS
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Volkswagen Passat Alternator Part Number: 06K-903-024
$1140.69 MSRP: $1438.45
You Save: $297.76 (21%)
Ships in 1-2 Business Days
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Product Specifications
- Replaced by: 06K-903-024-E
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2014-2017 Volkswagen Passat | Limited Edition, R-Line, S, SE, SEL, SEL Premium, Sport, Wolfsburg Edition | 4 Cyl 1.8 L GAS
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Volkswagen Passat Alternator Part Number: 051-903-017-X
$515.38 MSRP: $644.62
You Save: $129.24 (21%)
Ships in 1-2 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 1990-1993 Volkswagen Passat | CL, GL | 4 Cyl 2.0 L GAS
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Volkswagen Passat Alternator Part Number: 028-903-031-AX
$549.47 MSRP: $687.60
You Save: $138.13 (21%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2004-2005 Volkswagen Passat | GL TDI, GLS TDI | 4 Cyl 2.0 L DIESEL
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Volkswagen Passat Alternator Part Number: 06B-903-018-EX
$402.21 MSRP: $501.91
You Save: $99.70 (20%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaces: 078-903-016-HX
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2002-2005 Volkswagen Passat | GL, GLS, GLS 4 Motion | 4 Cyl 1.8 L GAS
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Volkswagen Passat Alternator Part Number: 07K-903-023-CX
$651.74 MSRP: $819.22
You Save: $167.48 (21%)
Ships in 1-2 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2012-2014 Volkswagen Passat | S, SE, SEL, SEL Premium, Wolfsburg Edition | 5 Cyl 2.5 L GAS
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Volkswagen Passat Alternator Part Number: 07K-903-023-C
$768.59 MSRP: $969.21
You Save: $200.62 (21%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2012-2014 Volkswagen Passat | S, SE, SEL, SEL Premium, Wolfsburg Edition | 5 Cyl 2.5 L GAS
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Volkswagen Passat Alternator Part Number: 07D-903-021
$770.39 MSRP: $971.49
You Save: $201.10 (21%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Generator
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2002-2004 Volkswagen Passat | W8 | 8 Cyl 4.0 L GAS
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Volkswagen Passat Alternator Part Number: 06J-903-023-CX
$631.44 MSRP: $792.30
You Save: $160.86 (21%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaces: 06D-903-016-AX
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2009-2010 Volkswagen Passat | Komfort | 4 Cyl 2.0 L GAS
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Volkswagen Passat Alternator Part Number: 078-903-016-SX
$610.54 MSRP: $764.62
You Save: $154.08 (21%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2002-2005 Volkswagen Passat | GL, GLS, GLS 4 Motion, GLX, GLX 4 Motion | 6 Cyl 2.8 L GAS

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1-20 of 36 Results

Volkswagen Passat Alternator

Volkswagen Passat Alternator transforms engine movement into constant electricity, which maintains the charge of the battery and powers all lights and control modules. It is mounted on the front of the engine and connected to the crankshaft belt; then, as the motor rotates, a rotor mounted on the shaft passes through fixed stator windings and, according to Faraday's Law, generates voltage. Due to the alternating current of the output, the diode rectifiers in the rear housing transform the alternating current into direct current that the electrical network requires. Each half of the rugged aluminum shell has bearings that allow the shaft to rotate freely, and there is an internal fan that moves cooling air over the windings and heat sinks. The earlier Volkswagen cars employed an external or independent internal voltage regulator, which applied to regulate the field current; however, the later Volkswagen cars have passed that responsibility to the powertrain control module, which also adjusts output to avoid undercharging and overcharging. This shift in the regulators to PCM control is the primary shift in the Alternator design in the lifespan of the Passat, since the rotor-stator-diode layout is the same. Either with the earlier regulator or with the PCM-controlled unit supplied to the later Volkswagen sedans, all have lightweight aluminum cases, built-in brushes that supply the rotating field coil, and cooling fans that combat heat during day-to-day driving. Concisely, the Alternator is an unboastful device that transforms mechanical movement into dependable electrical current and ensures that the headlights are lit and the electronics become functional whenever the engine is operating.

Choose OEM Alternator 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 Alternator 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 Alternator Parts and Q&A

Alternator
028-903-029-R
Q: What precautions should be taken when disconnecting the battery equipped with an alternator and an anti-theft radio on Volkswagen Passat?
A:
These models come with anti-theft radio, therefore, have the activation code prior to the battery disconnection. The battery disconnection may cause driveability problems, which may be fixed with the help of the scan tool and it may also provoke a warning light on the instrument panel, which should be switched off with the help of the scan tool. The majority of publicly available scan tools do not have the facilities to complete such functions and as such a visit to an appropriate dealer service department or a properly equipped repair facility can be required following service work. Start by detaching the negative battery cable then proceed to detach the engine cover and splash shield. Removing the air intake duct and alternator drivebelt, removing the engine cooling fan, disconnecting the wire terminals to the alternator, and removing the alternator mounting bolts are steps that one has to follow to remove it on four-cylinder models. In the V6 models, loosen the front end/radiator support by making it lie in service position, loosen the alternator drivebelt and the refrigerant line clamp, disconnection of starter/alternator wiring harness, alternate removal of coolant duct at the alternator, then loosen the alternator mounting bolts. In case changing the alternator, carry the old one so that the new or re-manufactured one will be the same in terms of looks, arrangement of terminals and identification numbers. Note that lots of new or rebuilt alternators do not include a pulley, and therefore ensure the store policy on pulley installation. The reverse sequence of the removal procedure involves installation with ensuring tightening the mounting bolts to the required torque and provision of the drivebelt. Lastly, test the charging voltage to make sure that the alternator is working.