What precautions should be taken when disconnecting the battery and replacing the fuel filter on 2004 Volkswagen Passat?

These models are fitted with an anti-theft radio; make sure to have the activation code when changing the battery otherwise it could lead to driveability and warning lights. The under-rear fuel filter had to be changed at intervals. There are correct steps in removal and installation, and one should look after the leaks.

Genuine 2004 Volkswagen Passat Fuel Filter

Gas Filter

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2004 Volkswagen Passat Fuel Filter Part Number: 1J0-127-401-A
$30.47 MSRP: $42.32
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Product Specifications
- Item Weight: 1.20 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 1J0-127-401-A
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following 2004 Volkswagen Passat Submodels:
- GL TDI, GLS TDI | 4 Cyl 2.0 L DIESEL

2004 Volkswagen Passat Fuel Filter Parts and Q&A

Q: What precautions should be taken when disconnecting the battery and replacing the fuel filter on 2004 Volkswagen Passat?
A: These models are fitted with an anti-theft radio; make sure to have the activation code when changing the battery otherwise it could lead to driveability and warning lights. The under-rear fuel filter had to be changed at intervals. There are correct steps in removal and installation, and one should look after the leaks.