What is the significance of Piston Top Dead Center (TDC) in engine timing on 2005 Audi A4?

Top Dead Center (TDC) is the maximum height that a piston travels to, which is important in activities such as the replacement of timing belt. In order to align a piston at TDC, rotate the crankshaft clockwise. Use socket and breaker bar and disable the fuel system. It is important to check TDC by aligning timing marks.

Genuine 2005 Audi A4 Piston

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2005 Audi A4 Piston Part Number: 06D-107-066-AB
$401.61 MSRP: $562.48
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Product Specifications
- Replaces: 06D-107-066-AA, 06D-107-066-C, 06D-107-066-T
- Item Weight: 1.40 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 06D-107-066-AB
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following 2005 Audi A4 Submodels:
- Base, Cabriolet | 4 Cyl 2.0 L GAS
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2005 Audi A4 Piston Part Number: 06C-107-065-N
$573.58 MSRP: $803.33
You Save: $229.75 (29%)
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Product Specifications
- Replaces: 06C-107-065-M, 06C-107-065-H
- Item Weight: 1.40 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 06C-107-065-N
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following 2005 Audi A4 Submodels:
- Base, Cabriolet | 6 Cyl 3.0 L GAS
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2005 Audi A4 Pistons Part Number: 06B-107-065-N
$321.29 MSRP: $449.98
You Save: $128.69 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Piston; Pistons
- Replaces: 06B-107-065-F
- Item Weight: 1.40 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 06B-107-065-N
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
More Info
Fits the following 2005 Audi A4 Submodels:
- Base, Cabriolet | 4 Cyl 1.8 L GAS

2005 Audi A4 Piston Parts and Q&A

Q: What is the significance of Piston Top Dead Center (TDC) in engine timing on 2005 Audi A4?
A: Top Dead Center (TDC) is the maximum height that a piston travels to, which is important in activities such as the replacement of timing belt. In order to align a piston at TDC, rotate the crankshaft clockwise. Use socket and breaker bar and disable the fuel system. It is important to check TDC by aligning timing marks.