V40 L4-1.9L Turbo VIN 29 B4204T3 (2002)
Symptoms of a deployed seat belt tensioner:
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when the seat belt is pulled out, it sticks or jerks
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the seat belt cannot be stretched out at all or only very little.
Preparations
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Make a note of the anti-theft radio code
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Switch off the ignition
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Disconnect the battery negative terminal.
NOTE: Wait at least five minutes before disconnecting the connector or beginning work with electrical components.
Removing The B-post Seat Belt Tensioner
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Remove the B-post panel
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Disconnect the connector from the seat belt tensioner
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Remove the two screws for the seat belt reel from the B-post
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Pull the seat belt upwards and outwards.
Checking The Seat Belt Tensioner