What are the potential issues and necessary precautions when disconnecting the battery and handling the Engine Control Module (ECM) on 2005 Volkswagen Passat?

Disconnecting the battery might lead to drivability problems and warning lights that require dealers-level scan tools. Protect the ECM from static damage, and store it on an anti-static pad. Replacement involves programming. To remove the ECM, the battery must be disconnected and the housing cover and clips removed, as well as unplug connectors, and reinstalled in reverse order.

Genuine 2005 Volkswagen Passat Engine Control Module

Engine Control Computer

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3 Engine Control Modules found

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2005 Volkswagen Passat ECM Part Number: 3B0-907-551-DC
$797.88 MSRP: $1006.15
You Save: $208.27 (21%)
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Product Specifications
- Other Name: Control Unit
- Item Weight: 2.40 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 3B0-907-551-DC
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following 2005 Volkswagen Passat Submodels:
- GL, GL TDI, GLS, GLS 4 Motion, GLS TDI, GLX, GLX 4 Motion | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L DIESEL, 6 Cyl 2.8 L GAS
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2005 Volkswagen Passat ECM Part Number: 4B0-906-018-DQ
$817.40 MSRP: $1030.77
You Save: $213.37 (21%)
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Product Specifications
- Other Name: Control Unit
- Replaces: 4B0-906-018-DN, 4B0-906-018-DP, 4B0-906-018-DA
- Item Weight: 2.20 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 4B0-906-018-DQ
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
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Fits the following 2005 Volkswagen Passat Submodels:
- GL, GLS, GLS 4 Motion | 4 Cyl 1.8 L GAS
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2005 Volkswagen Passat ECM Part Number: 038-906-016-R
$968.68 MSRP: $1221.54
You Save: $252.86 (21%)
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Product Specifications
- Other Name: Module
- Item Weight: 2.30 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 038-906-016-R
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following 2005 Volkswagen Passat Submodels:
- GL TDI, GLS TDI | 4 Cyl 2.0 L DIESEL

2005 Volkswagen Passat Engine Control Module Parts and Q&A

Q: What are the potential issues and necessary precautions when disconnecting the battery and handling the Engine Control Module (ECM) on 2005 Volkswagen Passat?
A: Disconnecting the battery might lead to drivability problems and warning lights that require dealers-level scan tools. Protect the ECM from static damage, and store it on an anti-static pad. Replacement involves programming. To remove the ECM, the battery must be disconnected and the housing cover and clips removed, as well as unplug connectors, and reinstalled in reverse order.