Audi A4 B9 45 Tfsi Mild Hybrid
Car parts and drivetrain components for Audi A4 B9 45 Tfsi Mild Hybrid. Always check the fit before ordering.
Products for Audi A4 B9 45 Tfsi Mild Hybrid
- Position: Front left, Front right
- Flange diameter: 123 mm
- Joint diameter: 83,6 mm
- Total length: 466 mm
- ABS teeth: 0
- Position: Front, Inner
- Total length: 88 mm
- Splines gearbox side: 34
- ABS teeth: 34
- Position: Front, Outer
- Inner splines: 28
- Outer diameter: 94 mm
- Splines wheel side: 42
Frequently asked questions about Audi A4 B9 45 Tfsi Mild Hybrid
How do I know if my Audi A4 B9 needs a new drive shaft?
The most common symptoms are vibrations through the car under acceleration or unusual noises from the wheel arches. If you notice shaking under load that subsides when you lift off the accelerator, it is often a worn inner CV joint or the drive shaft itself.
What is the difference between the inner and outer CV joint on a 45 TFSI?
The outer CV joint sits closest to the wheel and accommodates steering movement; when worn, it typically produces clicking noises when cornering. The inner CV joint is positioned next to the gearbox and accommodates axial movement; failure here usually causes vibrations through the body shell.
Do these parts fit both saloon and Avant models?
Yes, drivetrain components for the Audi A4 B9 45 Tfsi Mild Hybrid are generally identical for both saloon and Avant models, provided they share the same drivetrain layout (such as front-wheel drive or Quattro). Always confirm by selecting your vehicle's exact make, model and engine.
How does your fitment guarantee work for Audi parts?
Our fitment guarantee means that if you have selected your car by make, model and engine and we state that the part fits, we guarantee correct fitment. In the unlikely event that it does not fit, we will help you find the correct part or issue a full refund.
Why is the mild hybrid system relevant when choosing a drive shaft?
The mild hybrid setup in the 45 TFSI provides additional instant torque during pull-away and hard acceleration, which increases peak shock loads on the drive shafts compared to conventional engine variants. This demands high-quality components engineered to withstand these torque spikes.
Can I replace just the CV boot if the joint is still in good condition?
Yes, if you catch a split CV boot early before dirt and moisture have damaged the joint, thoroughly cleaning, regreasing, and fitting a new CV joint boot is usually sufficient. It is a highly cost-effective way to preserve and extend the lifespan of the CV joint.