Inner CV joints for Audi A4 B9
Find the right inner CV joint for your Audi A4 B9, whether front-wheel drive or quattro all-wheel drive. Our range covers the extensive B9 engine line-up, including TFSI petrol engines,...
Products for Inner CV joints for Audi A4 B9
- Position: Inner
- Inner splines: 34
- Total length: 88 mm
- Joint diameter: 123 mm
- Outer splines: 34
- Position: Front, Inner
- Inner splines: 24
- Total length: 84 mm
- Joint diameter: 81 mm
- Outer splines: 24
- Position: Inner
- Inner splines: 34
- Total length: 88 mm
- Joint diameter: 123 mm
- Outer splines: 34
- Position: Front, Inner
- Inner splines: 24
- Total length: 84 mm
- Joint diameter: 81 mm
- Outer splines: 24
- Position: Inner
- Inner splines: 34
- Total length: 88 mm
- Joint diameter: 123 mm
- Outer splines: 34
- Position: Front, Inner
- Inner splines: 34
- Joint diameter: 85 mm
- Position: Front, Inner
- Inner splines: 24
- Total length: 84 mm
- Joint diameter: 81 mm
- Outer splines: 24
- Position: Inner
- Inner splines: 34
- Total length: 88 mm
- Joint diameter: 123 mm
- Outer splines: 34
- Position: Front, Inner
- Inner splines: 34
- Joint diameter: 85 mm
- Position: Front, Inner
- Inner splines: 24
- Total length: 84 mm
- Joint diameter: 81 mm
- Outer splines: 24
- Position: Inner
- Inner splines: 34
- Total length: 88 mm
- Joint diameter: 123 mm
- Outer splines: 34
- Position: Inner
- Inner splines: 34
- Total length: 88 mm
- Position: Front, Inner
- Inner splines: 34
- Joint diameter: 85 mm
- Position: Front, Inner
- Inner splines: 24
- Total length: 84 mm
- Joint diameter: 81 mm
- Outer splines: 24
- Position: Inner
- Inner splines: 34
- Total length: 88 mm
- Joint diameter: 123 mm
- Outer splines: 34
- Position: Front, Inner
- Inner splines: 34
- Joint diameter: 85 mm
- Position: Front, Inner
- Inner splines: 24
- Total length: 84 mm
- Joint diameter: 81 mm
- Outer splines: 24
Inner CV joints for Audi A4 B9
Inner CV joints for Audi A4 B9 are critical driveline components that demand high precision. This generation of the A4, known as the B9, places heavy demands on component durability, particularly given the high-torque TDI and TFSI engines often fitted to these cars. An inner CV joint is mounted closest to the gearbox, and its primary task is to allow the drive shaft to move up and down in line with suspension movements while transmitting power from the engine to the wheels. Selecting the correct component for your specific Audi A4 B9 is vital to maintaining the smooth, vibration-free ride that characterises the model. At the first sign of wear, you should act quickly to prevent consequential damage to the output shafts or bearings in the gearbox.
What does an inner CV joint do on the Audi A4 B9?
The inner CV joint on an Audi A4 B9 acts as a flexible link between the gearbox output shaft and the driveshaft itself. Unlike the outer constant velocity joint, which sits at the wheel and must cope with wide steering angles, the main task of the inner joint is to handle axial plunge and vertical movements. When the car drives over bumps in the road, the physical distance between the gearbox and the wheel hub changes continuously. This is where the inner joint steps in to compensate for this change in length through its plunging design. Without a properly functioning inner joint, the drivetrain would be subjected to enormous stress with every suspension movement, rapidly leading to mechanical failure in either the gearbox or the suspension. The inner joint is therefore essential for both comfort and mechanical integrity.
Common signs of wear
Wear on an inner CV joint in an Audi A4 B9 often presents differently from a failing outer joint. The most typical symptom is vibration that occurs specifically under acceleration, frequently at speeds between 70 and 100 km/h. These vibrations can be felt throughout the cabin and in the seats rather than merely through the steering wheel, which is a key distinction. Another common sign is a dull thud or clunking sound when coming off the throttle or changing gear, indicating play in the joint's internal mechanism. If the CV boot protecting the joint has split, grease can escape and dirt can penetrate, causing the joint to run dry and wear out extremely quickly. It is therefore vital to inspect the boots at every service to prevent costly repairs to the entire drivetrain later on.
How to choose the correct inner CV joint
To choose the correct inner CV joint for your Audi A4 B9, you need to consider several technical parameters that vary across different specifications. The spline count—the number of teeth on both the inside and outside of the joint—can vary depending on whether the car is fitted with a manual gearbox or an S-tronic dual-clutch transmission. In addition, the joint diameter and mounting to the gearbox can differ between front-wheel-drive models and quattro variants. The most reliable way to find the correct part in our range is to select your car's make, model and engine in our vehicle picker. This filters our catalogue so you see precisely what fits your specific configuration. We also recommend checking whether it is more economical to replace the complete Drive shafts for Audi A4 B9 if you discover extensive wear in multiple areas.
Related parts to inspect
Be sure to also check these exact pages for the same vehicle when working on the inner CV joint:
When a driveline component shows signs of wear, neighbouring parts on the same car often require inspection too. By comparing these exact pages for Audi A4 B9, it becomes easier to determine whether the fault lies strictly in the inner CV joint or in another adjacent section of the drivetrain.
This is particularly relevant on models where vibrations, play and noises can transfer symptoms across several driveline components. A quick check of related categories reduces the risk of replacing the right type of part while overlooking an adjacent component that affects the same issue.
By proactively replacing worn components and keeping the CV boots intact, you will considerably extend the service life of both your gearbox and differential.
Why shop at CVJoint24?
CVJoint24 is the international shop of a Swedish driveline specialist with its warehouse in Helsingborg, Sweden, dedicated to technical quality and exact fitment. We understand that your Audi A4 B9 requires high-precision parts to perform optimally and preserve its premium driving feel. Combining our technical expertise with extensive stock, we offer prompt deliveries across the EU and dependable purchases for DIY mechanics and professional garages alike. Our vehicle search by make, model and engine is designed to give you complete peace of mind, ensuring you always get the right part for your car without hassle. We are your partner for everything from Inner CV joints to complete drive shafts and propeller shafts, and we never compromise on the quality of our range.
Frequently asked questions about inner CV joints for Audi A4 B9
What are the most common symptoms of a faulty inner CV joint on an Audi A4 B9?
The most common symptom is body vibration during acceleration, especially at higher speeds. Unlike outer CV joints, which click when cornering, worn inner joints typically cause shuddering that can be felt throughout the entire car.
Can I replace just the inner CV joint, or do I need to replace the complete drive shaft?
On the Audi A4 B9, it is often possible to replace only the inner CV joint if the rest of the drive shaft is in good condition. However, if the shaft has covered many kilometres or the outer joint is also worn, replacing the complete drive shaft can be more cost-effective.
How do I know which inner CV joint fits my Audi A4 B9?
The easiest and most reliable way is to select your car's model, year and engine variant in our search filter. Because specifications such as spline count and diameter vary between different engines and gearboxes, matching your vehicle details ensures you get the exact right part.
Why does my Audi A4 B9 vibrate under acceleration?
Vibrations under acceleration are often caused by internal wear in the inner CV joint or by grease leaking out. When the joint is placed under load during acceleration, it creates an imbalance that travels through the drivetrain and into the car's body.
Is there a difference in inner CV joints between front-wheel drive and quattro models?
Yes, dimensions and mountings can differ between front-wheel drive and quattro models. It is therefore vital to verify your vehicle's specific drivetrain before placing an order.
How often should I inspect the boots on my inner CV joints?
We recommend inspecting the CV boots at every oil service or at least once a year. A split or torn boot is the most common reason an inner CV joint fails prematurely.