Inner CV joints for Audi A4 B9 Avant 40 TDI Quattro
For owners of the four-wheel-drive Audi A4 B9 Avant 40 TDI quattro, we supply inner CV joints engineered to meet the requirements of model years 2018–2020. Select your make, model and...
Products for Inner CV joints for Audi A4 B9 Avant 40 TDI Quattro
- Position: Front, Inner
- Total length: 88 mm
- Splines gearbox side: 34
- ABS teeth: 34
Inner CV joints for Audi A4 B9 Avant 40 TDI Quattro
The inner CV joint is a critical component in the drivetrain of your Audi A4 B9 Avant 40 TDI Quattro. As part of the modern B9 platform, these cars require components built to exact tolerances to preserve the driving dynamics and refined comfort for which Audi is renowned. The 40 TDI engine produces substantial torque, placing demanding loads on the drivetrain's durability, especially in combination with the effective traction of the Quattro system. An inner CV joint that begins to fail can quickly impair the entire driving experience through persistent vibrations and instability.
At CVJoint24, we specialise in these exact components so that you can maintain your vehicle with parts engineered to endure for the long haul. Choosing the right spare part ensures your powertrain continues to deliver its performance to the wheels without unnecessary power losses or intrusive cabin noises. Investing in a high-grade constant velocity joint serves as sound insurance against costly future breakdowns.
What does the inner CV joint do on the Audi A4 B9 Avant 40 TDI Quattro?
The primary task of the inner CV joint on an Audi A4 B9 Avant 40 TDI Quattro is to transfer torque from the gearbox or differential out to the drive shaft. Unlike the outer CV joint, which manages substantial steering angles at the front wheels, the inner CV joint is typically a tripod or plunging joint design engineered to accommodate the vertical travel caused by suspension movement. In a vehicle with Quattro four-wheel drive, these components are exposed to continuous forces during both hard acceleration and engine braking.
The inner joint allows the drive shaft to alter its effective length and working angle relative to the gearbox, which is indispensable for smooth, vibration-free driving on any road surface. Without a well-lubricated and properly functioning inner joint, the drivetrain would bind, risking severe damage to far costlier assemblies such as the gearbox output shafts or differential bearings. The precision of these components is fundamental to Audi's sophisticated all-wheel-drive technology.
Common symptoms of wear
Wear in an inner CV joint typically presents differently from wear in an outer unit. The most characteristic sign of a failing inner CV joint on an Audi A4 B9 Avant 40 TDI Quattro is a distinct vibration during acceleration. These vibrations are felt throughout the bodyshell and generally disappear the moment you lift off the accelerator. This is a clear indicator that the joint has developed play or that the internal rollers are no longer tracking smoothly within their housings.
Another common warning sign is a dull thud or clunking noise under load or when negotiating uneven road surfaces. If the CV boot protecting the joint has split, grease will escape and dirt will enter, accelerating mechanical wear dramatically. It is vital to inspect the boots regularly to avoid complete failure. If you detect grease splatters on the vehicle underbody near the gearbox, it is time to take action before the joint suffers permanent damage.
How to choose the correct inner CV joint
Selecting the right inner CV joint for an Audi A4 B9 Avant 40 TDI Quattro can be complex, as technical variations occur depending on production date and specific factory options. The most critical details to verify are the spline count on both the inner and outer sections of the joint, alongside the diameter of the oil seal surface. As a dedicated Swedish driveline specialist, we make this selection process straightforward.
By selecting your vehicle's make, model and engine in our catalogue, you can filter directly to the car parts that are technically compatible with your specific car. This removes guesswork and guarantees a component with a precise fit first time, saving both time and labour during installation. We always advise cross-checking measurements against the original part if you are in any doubt, but our database is structured to guide you to the right component immediately.
Related parts to inspect
We recommend checking these exact pages for the same vehicle when working on the inner CV joint:
Whenever a driveline component shows signs of wear, neighbouring parts on the vehicle should also be inspected. By cross-referencing these dedicated pages for the Audi A4 B9 Avant 40 TDI Quattro, it becomes much easier to determine whether an issue stems solely from the inner CV joint or from an adjoining section of the drivetrain.
This is particularly critical on models where vibrations, play and unusual noises can easily transfer across several connected driveline assemblies. A thorough check of related categories minimises the risk of replacing one correct part while overlooking an adjacent component that contributes to the very same symptom.
- Audi A4 B9 Avant 40 TDI Quattro
- Drive shafts for Audi A4 B9 Avant 40 TDI Quattro
- Propeller shafts for Audi A4 B9 Avant 40 TDI Quattro
Replacing worn components promptly prevents consequential damage to the gearbox and differentials, keeping your Audi in peak operating condition for many thousands of kilometres to come.
Why shop at CVJoint24?
CVJoint24 is your dedicated partner for driveline and power transmission components for premium German cars. We unite deep technical know-how with a comprehensive range of quality spare parts carefully selected to meet or exceed original equipment standards. As our customer, you benefit from our exact fitment standards and our commitment to helping you select the correct part straight away without complicated returns.
We appreciate how important it is to get your vehicle back on the road without delay, which is why we offer rapid dispatch on stocked items across the European Union from our central warehouse in Helsingborg, Sweden. Our exclusive specialisation in driveline systems means we deliver detailed technical expertise and dedicated support that general car parts retailers rarely provide. When you buy from us, you receive high-grade components backed by an experienced Swedish specialist committed to your vehicle's reliability and performance.
Frequently asked questions about inner CV joints for Audi A4 B9 Avant 40 TDI Quattro
How do I know if the inner CV joint is failing on my Audi A4 B9?
The most common symptoms are vibrations through the body shell under acceleration that stop when you ease off the throttle, as well as dull clunking noises from the drivetrain under load.
Can I replace just the inner CV joint, or do I need to replace the entire drive shaft?
On the Audi A4 B9 Avant, you can often simply replace the inner CV joint on its own if the shaft itself is straight and undamaged, making it a cost-effective alternative to a complete drive shaft.
Does the same inner CV joint fit both the left and right sides?
It depends on the gearbox type and vehicle configuration. Always select your exact make, model and engine to check the precise fitment for your 40 TDI Quattro.
What grease should be used in an Audi inner CV joint?
Inner CV joints frequently require a specific high-temperature grease, particularly if they feature a tripod design. Our joints are always supplied with the correct type and quantity of grease for optimum service life.
How does the Quattro system affect wear on the inner CV joints?
Because the Quattro system distributes power across all four wheels, the inner joints are subjected to continuous load, placing higher demands on material quality than in two-wheel-drive vehicles.
What happens if I drive with a faulty inner CV joint for too long?
Prolonged vibrations can damage the gearbox output bearings and seals, which can lead to significantly more expensive repairs than simply replacing the CV joint.