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Genuine BMW E34 525i Intake Boot | Secondary Throttle To Air Mass Sensor Hose
About this item
If you've got a BMW E34 525i with a vacuum leak or a rough idle, check this intake boot.
It's a Genuine BMW part, so you're getting the exact same quality that came from the factory.
It's the hose that connects the secondary throttle housing to the air mass sensor.
Over time, these rubber boots get hard and crack, letting in unmetered air.
The part number is 13541703695, also listed as 13 54 1 703 695.
Replacing it with this new, OEM part will smooth out your idle and fix those air leaks.
A small part that makes a big difference.
USD$ 41.25 
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