Inner CV joints for Audi A4 B9 40 Tfsi Mild Hybrid
When it is time to replace the inner CV joint on your Audi A4 B9 40 TFSI Mild Hybrid, you will find components here to suit front-wheel-drive saloon models from 2017 onwards. To ensure...
Products for Inner CV joints for Audi A4 B9 40 Tfsi Mild Hybrid
- Position: Front, Inner
- Total length: 88 mm
- Splines gearbox side: 34
- ABS teeth: 34
Inner CV joints for Audi A4 B9 40 Tfsi Mild Hybrid
The Audi A4 B9 represents a sophisticated era of German engineering where every drivetrain component is optimised for both efficiency and performance. For the 40 Tfsi Mild Hybrid model, this is especially noticeable, as the system pairs a powerful internal combustion engine with an electric starter-generator that delivers extra torque during pull-away and acceleration. The inner CV joint serves as the critical link transferring this combined output from the gearbox out to the drive shafts. Here at CVJoint24, you will find inner CV joints engineered specifically to cope with the unique load patterns generated in a mild hybrid.
We are drivetrain specialists and understand that an Audi demands parts with an exact fit to retain its renowned driving dynamics. By choosing a high-quality inner constant velocity joint from our range, you ensure that your vehicle's power delivery remains quiet, efficient and reliable for many kilometres to come. We stock parts that meet the rigorous standards of the B9 platform, ensuring hassle-free installation and a long working life.
What does the inner CV joint do on an Audi A4 B9 40 Tfsi Mild Hybrid?
The inner CV joint on an Audi A4 B9 40 Tfsi Mild Hybrid performs a technically demanding role that differs markedly from that of the outer joint. Whilst the outer joint at the wheel hub must manage high steering angles, the inner joint sits right by the gearbox or differential. Its primary purpose is to allow the drive shaft to plunge—changing length as the car's suspension moves up and down over uneven surfaces. This plunge motion is essential for maintaining seamless power delivery in all road conditions.
In a modern car like the A4 B9 with its advanced multi-link suspension, the inner joint must operate with exceptionally low friction to prevent vibrations from transferring into the cabin. For the 40 Tfsi engine, which frequently switches between different load states thanks to the mild hybrid system, it is vital that the inner joint handles these rapid transitions without developing mechanical play or noises. A worn joint here can quickly compromise the car's entire handling composure.
Common signs of wear
Identifying wear in an inner CV joint requires listening and feeling for specific vibrations rather than the sharp clicking sounds typical of worn outer joints. For owners of an Audi A4 B9 40 Tfsi Mild Hybrid, the most common symptom of a failing inner joint is a distinct vibration or shudder through the chassis under acceleration, particularly at speeds between 70 and 100 km/h. These vibrations are usually felt more through the seat and floor than through the steering wheel, which helps distinguish them from wheel or tyre imbalance.
Another symptom is a dull clunking noise when driving over bumps or when suddenly easing off the accelerator pedal. If you notice that the vibrations stop as soon as you depress the clutch or come off the throttle, that is a strong indicator of a worn inner constant velocity joint. It is also important to inspect the CV boot regularly; if it is split and leaking grease, the joint will rapidly degrade due to frictional heat and dirt ingress, leading to costly failure if not addressed in good time.
How to choose the correct inner CV joint
When the time comes to buy a replacement inner CV joint for your Audi A4 B9 40 Tfsi Mild Hybrid, precision is everything. Because Audi fits several different transmission types, including S-tronic dual-clutch gearboxes, the specifications for the inner joint can vary even within the same model year. Factors include the number of splines on the shaft, the outer diameter of the joint housing, and the method of securing it to the gearbox output flange. Fitting the wrong part can lead to severe damage to both the gearbox and the drive shaft.
To guarantee that you select the right part, simply filter by your vehicle's make, model and engine variant in our shop. This narrows the selection to components technically verified for your exact car. Choosing the right part straight away not only saves time on the ramp but also prevents future drivetrain vibration issues, which is crucial for a vehicle with the technical complexity of a 40 Tfsi Mild Hybrid. We are here to help you navigate the options and achieve a perfect fit.
Related parts to inspect
Feel free to check these related pages for the same vehicle when working on the inner CV joint:
When a drivetrain component shows signs of wear, adjacent parts on the same car often warrant inspection too. By comparing these related pages for the Audi A4 B9 40 Tfsi Mild Hybrid, it is easier to determine whether the problem lies with the inner CV joint itself or with another neighbouring part of the driveline.
This is especially important on models where vibrations, play and unwanted noises can transfer symptoms across several driveline components. A quick look over related categories minimises the risk of replacing the right type of component whilst overlooking an adjacent part that contributes to the very same issue.
- Audi A4 B9 40 Tfsi Mild Hybrid
- Drive shafts for Audi A4 B9 40 Tfsi Mild Hybrid
Why buy from CVJoint24?
Shopping with CVJoint24 means partnering with dedicated driveline specialists. We are the international shop of a Swedish driveline specialist shipping from our central warehouse in Helsingborg, Sweden, focusing on a comprehensive, high-quality range for modern passenger cars. For your Audi A4 B9 40 Tfsi Mild Hybrid, that means we understand the exact technical requirements and provide parts engineered to fit without compromise. Selecting your exact make, model and engine variant ensures peace of mind and an accurate match every time.
Our goal is to help you get the correct part first time with swift dispatch across the EU, minimising downtime for your car in the garage. We combine dependable product quality with genuine technical knowledge, making us the clear choice when you need durable components for your vehicle's power transmission. Our strict specialisation in drivetrain parts means we provide the expertise and product depth that general car parts stores often lack, keeping your Audi performing at its best.
Frequently Asked Questions about Inner CV Joints for Audi A4 B9 40 Tfsi Mild Hybrid
What are the symptoms of a worn inner CV joint on an Audi A4 B9?
The most common signs are body vibrations under acceleration, often at speeds between 70 and 100 km/h, which disappear when you lift off the accelerator.
Does the inner CV joint for the 40 Tfsi Mild Hybrid differ from other models?
Yes, specifications can vary depending on the gearbox type and drivetrain. Always select your vehicle's make, model, and engine variant to ensure the correct fitment.
Can I replace just the inner CV joint, or do I need to replace the entire drive shaft?
You can certainly replace just the inner joint if the rest of the shaft is in good condition, although in cases of extensive wear, a complete drive shaft can be more cost-effective.
Why does my Audi A4 B9 vibrate under acceleration?
Vibrations under load are a classic symptom of an inner CV joint that has developed play or lost lubrication due to a split CV boot.
Are the CV boot and grease included when I buy an inner CV joint?
Yes, our inner CV joints are supplied as complete kits including the CV boot, grease, and all necessary fixings for a straightforward replacement.
How do I ensure the CV joint fits my Audi A4 B9 40 Tfsi?
By selecting your vehicle's exact make, model, and engine details on cvjoint24.com, we filter out precisely the car parts compatible with your car's specific configuration.