Audi A8 6.3 W12 Quattro
Drivetrain parts and components for the Audi A8 6.3 W12 Quattro. Confirm fitment using make, model and engine before ordering.
Products for Audi A8 6.3 W12 Quattro
- Position: Front left, Front right
- Flange diameter: 123 mm
- Total length: 495 mm
- Splines wheel side: 42
- Position: Rear right
- Total length: 576 mm
- Splines wheel side: 42
- Position: Rear left, Rear right
- Flange diameter: 108 mm
- Total length: 660 mm
- Splines wheel side: 42
- Position: Outer
- Seal diameter: 76,5 mm
- Inner splines: 29
- Outer splines: 42
- Position: Outer
- Seal diameter: 76 mm
- Inner splines: 28
- Outer splines: 42
- Number of centre bearings: 1
- Number of joints: 3
- Total length: 1,856 mm
- Position: Rear
- Number of centre bearings: 1
- Number of joints: 3
- Total length: 1,675 mm
- Position: Rear left
- Total length: 620 mm
- Splines wheel side: 42
- Position: Front, Inner
- Total length: 84 mm
- Splines wheel side: 24
- Position: Front, Outer
- Inner splines: 28
- Outer diameter: 94 mm
- Splines wheel side: 42
- Position: Front, Inner
- Total length: 88 mm
- Splines gearbox side: 34
- ABS teeth: 34
Audi A8 6.3 W12 Quattro drivetrain parts
The Audi A8 6.3 W12 Quattro represents the pinnacle of German engineering, matching a massive twelve-cylinder engine with the legendary Quattro system. Getting all that power down onto the road cleanly and without vibration requires a drivetrain in first-class condition. The drivetrain in an Audi A8 equipped with the W12 engine is built to handle substantially higher stresses than standard models, making the choice of replacement parts crucial. Every single part, from the smallest CV joint to the long propeller shaft, must satisfy strict tolerance standards to maintain the car's remarkable refinement and performance.
As drivetrain specialists, we understand the exacting requirements of the Audi A8 6.3 W12 Quattro. We have selected the key components you need to service your car with parts that meet original equipment specifications. Whether you need to eliminate a knocking noise on full lock or resolve high-speed motorway vibrations, we have the technical expertise and quality parts to restore your car's factory-fresh driving feel.
How the drivetrain is configured on the Audi A8 6.3 W12 Quattro
The drivetrain on an Audi A8 6.3 W12 Quattro is a sophisticated permanent all-wheel drive setup. Power is routed from the large W12 engine through the gearbox and split by a centre differential to both the front and rear axles. The layout combines longitudinal and transverse torque transfer. Longitudinal power is carried by the propeller shaft, which runs beneath the centre of the floorpan to deliver drive to the rear axle. At each corner, drive shafts allow full suspension travel and steering angle while transferring power uninterrupted to the road wheels.
Because the W12 produces immense torque, the components within the Quattro system are heavily reinforced. The drive shafts feature larger diameters and the constant velocity joints use high-grade metallurgy designed to endure intense heat and mechanical stress. The inner CV joint at the gearbox accommodates axial movement, whilst the outer CV joint at the wheel hub enables the wide steering angles required. Understanding this arrangement is essential when diagnosing driveline faults.
Common faults and symptoms
Despite the high build quality of the Audi A8 6.3 W12 Quattro, drivetrain components are subject to gradual wear. One of the most typical signs of a worn outer CV joint is a rhythmic clicking or snapping sound heard clearly during tight turns at slow speeds. If you instead experience cabin-wide vibrations under hard acceleration, wear in an inner CV joint is frequently the cause. Driveline shudder can also stem from the prop shaft, particularly if vibrations occur within narrow speed ranges and are felt through the floorpan rather than the steering wheel.
Another common warning sign is split CV boots leaking grease. Once a boot tears, lubricating grease is slung out rapidly while road grit and water penetrate the joint bearings. This causes rapid abrasive wear that quickly destroys an otherwise healthy CV joint. For Audi A8 6.3 W12 Quattro owners, it is vital to address these symptoms early, as the sheer torque of the W12 engine can quickly turn minor play into a major mechanical failure.
Popular replacement parts for the Audi A8 6.3 W12 Quattro
Our product range for the Audi A8 6.3 W12 Quattro covers all the critical parts needed for an effective driveline overhaul. We currently stock 4 different drive shafts to suit the various axle positions. If you do not require a complete driveshaft assembly, we also supply 2 types of outer CV joints and 1 dedicated inner CV joint, allowing a cost-effective repair when the shaft bar remains straight and true.
Alongside wheel-end components, we also stock 2 types of propeller shafts. The prop shaft is frequently overlooked, yet it is essential for smooth, vibration-free running in an all-wheel-drive saloon like the Audi A8. By offering these precise product groups, we make it simple to pinpoint and replace the exact component causing issues. Every part is carefully specified to handle the immense torque output of the W12 powerplant.
How to find the correct parts for your Audi A8 6.3 W12 Quattro
Navigate directly to the right category for your Audi A8 6.3 W12 Quattro:
When troubleshooting a car with multiple interconnected driveline assemblies, starting in the right section saves time. By comparing the dedicated categories for your Audi A8 6.3 W12 Quattro, you can readily separate issues with drive shafts, CV joints or propeller shafts, taking you straight to the exact fitment your symptoms require.
- Drive shafts for Audi A8 6.3 W12 Quattro
- Outer CV joints for Audi A8 6.3 W12 Quattro
- Inner CV joints for Audi A8 6.3 W12 Quattro
- Propeller shafts for Audi A8 6.3 W12 Quattro
Choosing replacement driveline parts for a high-performance vehicle like the Audi A8 6.3 W12 Quattro demands absolute precision. The most reliable way to ensure correct fitment is to select your vehicle by make, model and engine variant in our catalogue. Filtering by your exact model ensures every listed component is verified for your specific A8, preventing mismatches in spline count, overall length and mounting flange dimensions.
To make browsing easy, our catalogue is organised into clear subcategories. You can jump directly to the components you need using the links below:
- Drive shafts for Audi A8 6.3 W12 Quattro
- Outer CV joints for Audi A8 6.3 W12 Quattro
- Inner CV joints for Audi A8 6.3 W12 Quattro
- Propeller shafts for Audi A8 6.3 W12 Quattro
Why choose CVJoint24?
CVJoint24 is the international shop of a Swedish driveline specialist, supplying quality components from our warehouse in Helsingborg, Sweden across the European Union. We combine deep technical knowledge with rigorously tested parts, which is essential for demanding luxury models like the Audi A8 6.3 W12 Quattro. When ordering from us, you can buy with total confidence, knowing our parts are built to OE standards and matched accurately when selecting your make, model and engine.
We know how important your car is for day-to-day driving and motorway touring. That is why we focus on prompt dispatch across Europe to minimise workshop downtime. Our aim is always to help you find the right component first time at a fair price. By specialising exclusively in driveline systems, we offer an in-depth inventory and technical expertise that generic car parts retailers simply cannot match.
Frequently asked questions about Audi A8 6.3 W12 Quattro
How do I know whether the inner or outer CV joint is faulty on my Audi A8 W12?
A worn outer CV joint typically produces a clicking noise when cornering, whereas a failing inner CV joint causes vibrations through the car under acceleration, whether cornering or driving in a straight line.
Can your drive shafts handle the high torque of a 6.3 W12 engine?
Yes, our drive shafts and joints for the Audi A8 6.3 W12 Quattro are specifically selected and engineered to withstand the power and torque delivered by the W12 engine.
Do I need to replace the entire drive shaft if only the boot is split?
No, if you catch a split boot early and the joint has not started making noises, replacing the CV boot and repacking it with fresh grease is usually sufficient. However, if the joint is already noisy, it should be replaced.
Why does my Audi A8 vibrate at higher speeds?
Vibrations at higher speeds in a Quattro model are often caused by imbalance or wear in the propeller shaft or its centre bearing, although worn inner CV joints can also be the culprit.
Are all necessary fitting accessories included when I buy a CV joint from you?
Yes, when you purchase a CV joint from us, it normally includes the CV boot, grease, clamps, and the required mounting bolt or nut to ensure a complete and proper installation.
How does the fitment guarantee work at cvjoint24.com?
Our fitment guarantee means that if you select your car's make, model and engine and we supply a part that does not fit, we will help you find the correct part or process your return at no extra cost.