N-911-297-01 Genuine VW/Audi Transmission Case Bolt - M12 x 120 mm

Genuine VW/Audi transmission case bolt, part number N-911-297-01. This original fastener secures the transmission case to the engine at the specified mounting position. Its published nominal size is M12 x 120 mm. One bolt is supplied.

Technical details

• Original number: N-911-297-01 / N91129701.
• Published nominal metric thread diameter: M12.
• Published nominal bolt length: 120 mm.
• External twelve-point head with flange, as pictured.
• Assigned connection: transmission case to engine.
• Other bolts, alignment sleeves and transmission mounting components are separate.

The transmission-to-engine joint uses multiple fasteners and locating features. This bolt belongs in the position assigned to its original number and length. It is not a universal replacement for every M12 fastener around the transmission case.

The 120 mm length distinguishes this bolt from shorter M12 fasteners in the case attachment. Compare the original mounting position and required length carefully; a shorter bolt does not provide equivalent engagement at a position specified for this fastener.

Common reasons to replace

Inspect the bolt during transmission removal, clutch service or other work that separates the transmission case from the engine. Replace damaged threads, a rounded drive head, corrosion affecting the bearing surface or a visibly bent fastener. Renew removed fasteners whenever the applicable factory procedure requires it.

Previous repairs can leave a mismatched bolt, an incorrect length or a damaged head that prevents proper installation. Verify the original number and mounting position before ordering. A bolt that starts in a threaded hole is not proof that its length and bearing arrangement are correct.

Inspect the joint if a fastener is missing or loose. Determine why it became loose and check the surrounding case, threads, locating features and other hardware. A replacement bolt cannot repair a cracked housing, stripped hole, damaged locating sleeve or an incorrectly aligned transmission.

Installation and service notes

Use the factory removal and installation procedure for the vehicle's exact engine and manual transmission. Support the drivetrain with appropriate equipment before disturbing the connection. Identify each fastening position and preserve the position information for bolts of different lengths.

Inspect the mating faces, threaded mounting point and locating features before assembly. Address damage or contamination using the prescribed repair procedure. Do not force a bolt into damaged or misaligned threads.

Align the transmission correctly with the engine before tightening the case fasteners. Do not use this bolt to pull a separated or misaligned transmission into position. Correct alignment is particularly important when the transmission has been removed for clutch work.

Start the bolt by hand in its assigned position. Use a correctly fitting twelve-point socket and keep it square to the head. Stop if the bolt binds before seating and recheck the hole, alignment and part selection instead of applying more force.

Follow the factory tightening sequence and the exact torque or angle requirement for this fastening position. No universal torque value applies to every transmission case bolt. Follow the specified thread preparation and replacement instructions; do not add lubricant or thread locking compound unless prescribed.

For replacement transmission cases or modified drivetrain installations, confirm the hardware specification independently. This original fastener's confirmed factory application does not establish compatibility with every conversion or aftermarket component.

Check that all required case fasteners and locating components are present before completing the surrounding service work. Perform the prescribed final checks for the repair. This listing supplies one 120 mm bolt rather than a complete transmission attachment hardware kit.

Fitment

Confirm the original bolt number, manual transmission and exact case fastening position before ordering. One bolt supplied.