How to remove and refit the front belt tensioner on the timing belt for 2.0 litre DOHC petrol engines on 2012 Audi A3?

Removing the timing belt starts by removing the tensioner/roller, be aware of the location of tensioner hub. Turn the crankshaft anti-clockwise to avoid piston to valve contact then loosen the camshaft sprocket bolt and take the sprocket off. Clean sprockers, check wear and change tensioner where needed. Install the tensioner roller and timing belt, checking that they are correctly assembled and within the right specification.

Genuine 2012 Audi A3 Belt Tensioner

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2012 Audi A3 Serpentine Tensioner Part Number: 038-903-315-AN
$122.56 MSRP: $171.64
You Save: $49.08 (29%)
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Product Specifications
- Other Name: Tensioner; Serpentine Tensioner
- Replaces: 03L-145-276, 038-903-315-AH, 038-903-315-AM
- Item Weight: 2.20 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 038-903-315-AN
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
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Fits the following 2012 Audi A3 Submodels:
- Base, TDI | 4 Cyl 2.0 L DIESEL, 4 Cyl 2.0 L GAS
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2012 Audi A3 Serpentine Tensioner Part Number: 06J-903-133-D
$136.84 MSRP: $191.65
You Save: $54.81 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Tensioner; Belt Tensioner, Serpentine Tensioner
- Replaces: 06J-903-133-A
- Item Weight: 2.20 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 06J-903-133-D
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
More Info
Fits the following 2012 Audi A3 Submodels:
- Base, TDI | 4 Cyl 2.0 L DIESEL, 4 Cyl 2.0 L GAS
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2012 Audi A3 Tensioner Part Number: 06H-109-467-AE
$104.71 MSRP: $146.64
You Save: $41.93 (29%)
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Product Specifications
- Replaces: 06H-109-467-L
- Item Weight: 0.70 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 06H-109-467-AE
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following 2012 Audi A3 Submodels:
- Base | 4 Cyl 2.0 L GAS

2012 Audi A3 Belt Tensioner Parts and Q&A

Q: How to remove and refit the front belt tensioner on the timing belt for 2.0 litre DOHC petrol engines on 2012 Audi A3?
A: Removing the timing belt starts by removing the tensioner/roller, be aware of the location of tensioner hub. Turn the crankshaft anti-clockwise to avoid piston to valve contact then loosen the camshaft sprocket bolt and take the sprocket off. Clean sprockers, check wear and change tensioner where needed. Install the tensioner roller and timing belt, checking that they are correctly assembled and within the right specification.