OVERVIEW
Genuine VW/Audi serpentine belt tensioner pulley bolt, part number N-910-329-01. This original fastener fits the assigned accessory-drive tensioner pulley connection on the VR6 arrangements below. It is supplied individually for replacement of missing or damaged pulley hardware.
Technical details
- Original number: N-910-329-01 / N91032901.
- Internal multipoint drive with the pictured rounded head.
- Specified connection: serpentine belt tensioner pulley bolt position.
- One bolt supplied. Tensioner, pulley, belt and other service hardware are separate.
The bolt secures the specified component at its intended mounting point in the accessory belt arrangement. Correct engagement and head contact are necessary for the assembly to remain properly seated. Similar-looking pulley bolts can differ in dimensions and assigned location.
This fastener is separate from the crankshaft pulley attachment and other idler or tensioner mounting bolts. Match the original number and the actual tensioner pulley arrangement before selecting replacement hardware.
Common reasons to replace
Replace a bolt with a damaged multipoint drive, worn threads, a distorted head, missing hardware or corrosion that compromises reliable installation. Previous service with an incorrect tool can damage the recess and make later removal difficult.
Belt, pulley or tensioner service can expose the fastener for inspection. Renew the bolt whenever the factory repair procedure requires replacement after removal. Correct any unsuitable hardware found during inspection of the accessory-drive assembly.
Belt noise, pulley movement or abnormal belt tracking requires diagnosis of the whole drive system. A new bolt cannot repair a worn pulley bearing, failed tensioner, damaged belt or distorted mounting surface. Replace the fastener as part of correcting the diagnosed defect.
Installation and service notes
Follow the factory procedure for the exact engine and accessory-drive layout. Observe the prescribed method for relieving belt tension and securing the tensioner. Spring-loaded components must be handled with the service equipment and sequence required by the procedure.
Inspect the pulley, tensioner, receiver and mating surfaces before assembly. Confirm the original bolt number and intended installation point. Start the correct bolt by hand without cross-threading or using it to force a misaligned component into place.
Use the correct multipoint tool fully seated in the drive recess. Apply the factory tightening specification for this exact tensioner pulley connection. Do not transfer a tightening value from an idler pulley, crankshaft bolt or unrelated accessory-drive fastener.
Follow the prescribed thread preparation, tightening sequence and hardware renewal instructions. Additional washers or thread treatments should be used only where required by the applicable factory procedure.
Confirm the correct belt route and seating in every pulley before completing assembly. Inspect neighboring pulleys and service parts disturbed during the repair. This listing supplies one bolt rather than a tensioner assembly or serpentine belt kit.
After installation, carry out the required operating checks and inspect belt tracking and component seating. Diagnose any remaining noise or movement rather than attempting to correct it by overtightening the fastener.
Fitment
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Volkswagen Passat | 2012–2018 | 3.6L VR6 gasoline | SEL Premium sedan; Original factory arrangement | Specified original serpentine belt tensioner pulley bolt position requiring N91032901. Match actual tensioner and pulley arrangement; one bolt supplied. |
| Volkswagen Passat | 2012–2014, 2017 | 3.6L VR6 gasoline | SE sedan; Original factory arrangement | Specified original serpentine belt tensioner pulley bolt position requiring N91032901. Match actual tensioner and pulley arrangement; one bolt supplied. |
| Volkswagen Passat | 2018 | 3.6L VR6 gasoline | GT sedan; Original factory arrangement | Specified original serpentine belt tensioner pulley bolt position requiring N91032901. Match actual tensioner and pulley arrangement; one bolt supplied. |
| Volkswagen R32 | 2008 | 3.2L VR6 gasoline | Mk5 hatchback, 4Motion; Original factory arrangement | Specified original serpentine belt tensioner pulley bolt position requiring N91032901. Match actual tensioner and pulley arrangement; one bolt supplied. |
Confirm N91032901 at the tensioner pulley connection. One bolt supplied.