I need a serpentine belt route diagram for my bmw 316i

1997 BMW 540i Serpentine Belt Routing and Timing Belt Diagrams (2carpros.com)

Jeff, Check the attached links,instruction and guides, diagram for a serpentine belt, Good luck
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You will find said diagram under hood near the front and around the radiator core support on a sticker and/or in the owner/repair manual.

Need engine information, but it's easy to lookup on gates.com website. Use the part selector, run through the choices...make, model, year, engine size....and when you get the list of belts, click on the camera icon next to the serpentine or accessory belt listing. It will open a diagram of the belt routing.

You didn't list your motor size so please pick the applicable diagram:


Accessory serpentine belt routing—4.8L, 5.3L & 6.0L engines


Accessory serpentine belt routing—5.7L engines with A/C


Accessory serpentine belt routing—5.7L engines without A/C


Accessory serpentine belt routing—6.5L Diesel engines


Accessory serpentine belt routing—7.4L engines


Accessory serpentine belt routing—8.1L engines

I'm not sure but there is often a diagram on the underside of the hood.

Hey Andy a quick was to solve your problem is to locate a similar vehicle in a car yard, go have a look at the configuration and draw your self a quick diagram whilst your there.