Audi Crankshaft Main Bearing Cap Bolt - Genuine VW Audi 078103039F

Product Information

An engine crankshaft main bearing cap bolt is a high-strength fastener that secures the main bearing caps to the engine block. These caps hold the crankshaft in place and keep the main bearings properly aligned, allowing smooth rotation under heavy loads. The bolts must maintain precise torque and clamping force to prevent movement of the crankshaft, ensuring durability and performance.

• Knocking or deep engine noises, if the crankshaft shifts due to loose or weakened bolts.
• Loss of oil pressure, caused by bearing misalignment or damage.
• Severe engine damage or seizure, if a bolt breaks or stretches, allowing the crankshaft to move out of position.

About Genuine VW Audi

The Volkswagen Group, also known as “VAG”, consists of Volkswagen, Audi, Lamborghini, Bentley, Bugatti, Porsche, Ducati, MAN, Scania, SEAT, and Skoda. The original parts used by VAG to build your car are available as replacement parts under the “Genuine VAG” brand. Manufactured under the direction of VAG, expect excellent quality and a premium price since these parts are available exclusively through the VAG Dealership network.

You may not realize this, but the parts that make up your VAG are not necessarily manufactured by VAG. No cause for concern, as VAG designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for VAG for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine VAG parts box and find an OEM branded part inside, simply with the addition of a VAG logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.