Audi VW Axle Bolt - Rein 4B0407643A

Product Information

The CV (Constant Velocity) axle assembly is responsible for transferring torque and rotational power from the transmission to the wheels while allowing for suspension movement and steering articulation. The CV axle consists of a shaft with joints at both ends: a CV joint that connects the axle to the transmission and another CV joint that connects the axle to the wheel hub. This design allows the axle to handle changes in angle and length as the vehicle moves, especially when turning or going over bumps.

• Clicking or Popping Noises: One of the most common signs of a failing CV axle is a clicking or popping noise when turning the vehicle. This noise typically occurs when the CV joint is damaged or worn out, especially during sharp turns.
• Vibration While Driving: A failing CV axle can cause noticeable vibrations while driving, especially at higher speeds. This vibration may indicate that the axle is bent, or damaged, or that the CV joints are worn out.
• Grease Leaks: If the CV axle boot tears or cracks, grease can leak out. You may notice grease on the inside of the wheel or around the CV joint. This can lead to increased wear on the joint due to a lack of lubrication.

About Rein

Founded in 2007, CRP Automotive introduced the Rein Automotive line of OE-quality replacement parts to the aftermarket. And in just two short years, Rein Automotive has become very popular among both warehouse distributors and professional repair technicians. Rein is the German word for “pure”, and has come to be synonymous with quality in the automotive aftermarket. A true dealer alternative.

The Rein brand includes a growing number of “better than OE” parts for selected applications. These parts address known weaknesses and premature failures of factory parts. Many of these replacement and service solutions have been developed with the help of our Innovation Council, a hand-picked group of experienced professional repair technicians and shop owners throughout North America.

All Rein Automotive OE-quality parts are backed by the CRP Automotive standard, and are backed with a ISO 9001:2015 quality management system certification. Each year, CRP Automotive ships thousands of Rein Automotive brand products. And with widespread NAFTA market distribution through strategically placed warehouses in Cranbury, New Jersey and Puebla, Mexico - OE-quality products like Rein Automotive are delivered to customers both faster and more cost-effectively than ever before.

In 2017 Rein partnered with FCP Euro in competing a W204 C300 AER car for the 2017 season. The partnership focused FCP Euro to dive deep into the Rein catalog offering, and hundreds of new products were added and integrated into our catalog. Hundreds of new packages were created not only using the full part pine up of Rein products, but also the entire family of CRP products like Pentosin.

Rein is also an innovative brand, winning numerous trade awards — including multiple new product innovation awards at the annual AAPEX trade show.