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TYC 2-20304 Alternator

Brand	TYC 2-20304
Oe Manufacturer	Bosch
Power Generation (amps)	140a
Pulley Type	Clutch pulley
Pully Wheel Grooves	6
Rotation Direction	Cw
Fits	Audi and Volkswagen · 5 vehicles

OE manufacturer. Built by Bosch for dependable alternator performance.

140A output. Provides strong charging capacity for electrical demands.

Clutch pulley. Helps smooth belt operation and reduce vibration.

Cross-references Bosch AL0170X and 04L 903 024 S for the same application. See all 2.

$242.00Free shipping

In stock · usually ships same day before 1pm CST

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Free returns within 60 days if it doesn't fit when fitment is verified.

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TYC 2-20304 Alternator Overview

The TYC 2-20304 alternator is a 140-amp charging unit built for Bosch OE applications. It uses a clutch pulley, 6-groove pulley design, and clockwise rotation to match the original charging system layout on select Volkswagen and Audi vehicles.

Compatible with 2018-2020 Volkswagen Atlas and 2015-2016 Audi A3, this alternator is a direct-fit replacement for Bosch-brand applications. The TYC 2-20304 supports stable electrical output for vehicles with standard charging demands and OE-style fitment.

Key Features

140A output for consistent charging performance
Bosch OE manufacturer application
Clutch pulley design
6-groove pulley wheel configuration
Clockwise rotation direction
Cross-reference: Bosch AL0170X and 04L 903 024 S

Detailed Description

TYC 2-20304 is an alternator for Bosch-based charging systems in the Volkswagen Atlas and Audi A3. The 140-amp rating, clutch pulley, and 6-groove belt interface are important details for matching the original accessory drive setup. If you are replacing a worn charging unit on a 2018-2020 Volkswagen Atlas or a 2015-2016 Audi A3, this part number provides the OE-style specifications needed for proper fitment. This part number, 2-20304, is also referenced against Bosch AL0170X and 04L 903 024 S for the same application.

Common Issues This Part Can Address

Low battery charging output
Battery warning light related to charging system faults
Dim lights caused by weak alternator performance
Electrical instability from a failing generator
Noise or belt drive concerns tied to a worn pulley assembly

Installation Notes and Tips

Verify pulley type, groove count, rotation direction, and amperage before installation. Confirm the vehicle application against the Bosch-based fitment listed for your Volkswagen Atlas or Audi A3, and compare the original unit to TYC 2-20304 before removal. Proper belt alignment and electrical connector matching are important for a correct replacement.

Quality Assurance

TYC manufactures replacement electrical components for OE-style applications, and this alternator follows the Bosch specification listed in the fitment data. Confirm all vehicle details before ordering to ensure the part matches the charging system requirements.

This part fits 5 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Submodel	Body Type	Liters	Cylinders	Fuel Type	Notes
2020	Volkswagen	Atlas	SEL R-Line	Sport Utility	3.6L	V6	—	Bosch Brand
2019	Volkswagen	Atlas	SEL	Sport Utility	3.6L	V6	—	Bosch Brand
2018	Volkswagen	Atlas	SE	Sport Utility	3.6L	V6	—	Bosch Brand
2016	Audi	A3	TDI Premium Plus	Sedan	2.0L	L4	DIESEL	Bosch Brand
2015	Audi	A3	TDI Prestige	Sedan	2.0L	L4	DIESEL	Bosch Brand
No rows match your filter.

Directly replaces or cross-references 2 part numbers

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

Bosch — AL0170X04L 903 024 S