VDI Transmission Mount 8K0399151AP is developed strictly to Audi original blueprints, ensuring OEM-Standard Fitment for Audi A4L, A4 Avant, A5, and Q5 with zero installation deviations; features superior vibration and noise reduction through a high-damping rubber compound reinforced with high-strength aluminum alloy or steel for exceptional durability and load-bearing capacity, significantly enhancing ride comfort; boasts a reinforced and long-lasting structure with anti-rust coated metal frame and oil-, heat-, and aging-resistant rubber body — lifespan far exceeds aftermarket alternatives — and undergoes specialized processing and rigorous testing to guarantee long-term reliability and eliminate frequent replacements.
Replacement No.:
8K0 399 151 BC
8K0 399 151 CL
Fit to:
AUDI A4L
AUDI A4Avant
AUDI A5
AUDI Q5
●Precise OE Match: Transmission mount 8K0399151AP exactly matches OE part number 8K0 399 151 AP
●Optimized Rubber Hardness: Transmission mount 8K0399151AP is fine-tuned for perfect balance of support and comfort (neither too soft nor too hard)
●Rust-Protected Metal Components: Transmission mount 8K0399151AP features strong corrosion resistance
●Resistant to Oil & Coolant: Transmission mount 8K0399151AP withstands harsh engine bay conditions
●100% Dynamic Balance Tested Before Shipping: Transmission mount 8K0399151AP eliminates vibration after installation
●Full Vehicle Model Verification: Transmission mount 8K0399151AP requires VIN for precise compatibility confirmation


What You’ll Need:
You don’t need fancy gear — just the basics: wrenches, a socket set, a screwdriver, and a reliable jack.
How to Do It:
1.Lift the car — Use the jack to raise it high enough to work safely underneath. Don’t forget to block the wheels.
2.Take out the old mount — Unbolt it, and save every bolt, washer, and spacer. You’ll need them again.
3.Take a look around — Check the transmission housing and where the mount attaches. Look for cracks, rust, or worn spots.
4.Put in the new one — Line up the holes, slip the new Transmission mount 8K0399151AP into place, and hand-tighten the bolts to hold it steady.
5.Torque it right — Tighten everything to the spec in your manual. Don’t guess — over-tightening can crack the mount; under-tightening lets it move and wear out fast.
6.Double-check — Lower the car, start the engine, and let it idle. Shift into gear gently. Listen for clunks or shakes. If it feels smooth, you’re good.
A Few Things to Remember:
Wipe down the mounting surfaces before installing — dirt or old rubber bits can mess up the fit.
Your owner’s manual is your best friend. Always use the right torque numbers and follow the exact mounting order. Don’t skip it.
Check ‘Em Regularly
Keep an eye on your transmission mounts. Look for cracks, wobbling, or the engine rocking way too much when you rev it.
Quick Test You Can Do:
Have someone you trust get behind the wheel, put it in Drive (D), hold the brake hard, then give it a light throttle. Pop the hood and watch the engine. If it’s jumping around like it’s possessed, your mounts are shot.
(This trick? Stole it from old-school gearheads on Reddit. Works every time.)
Don’t Skip Fluid Changes
Follow the manual’s schedule for changing transmission fluid. Old, gunky fluid wears out internal parts faster — and that stress gets passed right to the mounts.
One Thing People Always Ask:
“Do I really need a new filter every time I flush the system?”
✅ Yes. Every time. A clogged filter cranks up pressure inside the transmission, and that extra strain can kill mounts sooner than you think.
Drive Smooth, Not Hard
Easy on the gas, easy on the brakes. No jackrabbit starts or heavy towing if you can help it. Gentle driving goes a long way in keeping the Transmission mount 8K0399151AP alive.
Real Talk from a Frustrated Owner:
“I took my car in thinking the mount was covered under warranty… turned out it wasn’t. The dealer said my lead-foot driving killed it. Ouch.”
Bottom Line:
Inspect. Change the fluid. Drive smart.
Do these three things, and you’ll dodge expensive repairs down the road.
When driving, certain issues can arise that affect your car’s performance, and one of the most common sources of these issues is a worn or damaged transmission mount. The transmission mount plays a crucial role in keeping the transmission in place, absorbing vibrations, and reducing noise. When this part begins to fail, various symptoms can develop. Below, we explore some of the common problems associated with a failing transmission mount and provide potential solutions.
Clunking Noises
One of the most frequent signs of a bad transmission mount is a clunking noise, especially when shifting gears. Many car owners report hearing this noise when moving from reverse to drive. The sound may also occur when changing gears at low speeds.
Solution:
If you're experiencing clunking noises, it’s likely that the transmission mount has lost its ability to properly secure the transmission, causing it to shift or move during gear changes. Replacing the worn mount with a high-quality replacement Transmission mount 8K0399151AP should eliminate the noise.
Drivetrain Vibrations
Another common symptom of a failing transmission mount is drivetrain vibrations, particularly when the vehicle is idling in gear. You may notice that the car vibrates or shakes at low RPMs. Some owners have specifically mentioned experiencing drivetrain vibrations while idling in gear when their trans mount was sacked out.
Solution:
Vibrations can indicate that the mount is no longer absorbing the vibrations as it should, leading to an unstable drivetrain. Replacing the mount with a more durable, performance-grade Transmission mount 8K0399151AP will reduce these vibrations and restore a smoother driving experience.
Rough Gear Shifts
Rough gear shifts can also be a sign of a failing transmission mount. This issue may be more noticeable when shifting at lower speeds, especially between first to second gears or second to third gears. Some owners have described their gear shifts as "a little rough," where the transition between gears feels jerky or delayed.
Solution:
When the transmission mount wears out, it can cause the transmission to move slightly during gear shifts, making the process feel less smooth. Replacing the Transmission mount 8K0399151AP should improve the shift quality and reduce any roughness when changing gears.
Car Bogging
Car bogging is another common issue associated with a worn transmission mount. This typically happens when you release the accelerator at lower speeds. When the mount is worn out, the transmission may not stay in the correct position, leading to the engine feeling sluggish or bogging down when you ease off the gas.
Solution:
To fix this issue, you’ll need to replace the failing transmission mount. A new Transmission mount 8K0399151AP will help keep the transmission in place, preventing bogging and improving throttle response, especially at lower speeds.
Drivetrain Slack
If you feel an increase in drivetrain slack, it can make your car feel less responsive, and driving smoothly may become more difficult. Many owners have noted issues with drivetrain slack and clearance problems caused by the flex in the stock transmission mount. They reported "banging" sounds and difficulty maintaining smooth driving due to the excessive movement.
Solution:
If the stock mount is causing too much flex and drivetrain slack, upgrading to a performance Transmission mount 8K0399151AP can resolve these issues. A stiffer Transmission mount 8K0399151AP will reduce excessive movement, improve throttle response, and make the car feel more responsive when driving.
Conclusion:
A failing transmission mount can lead to a variety of driving issues, such as clunking noises, vibrations, rough gear shifts, car bogging, and drivetrain slack. If you're experiencing any of these symptoms, it’s important to address the problem promptly by replacing the faulty mount. Opt for high-quality replacement Transmission mount 8K0399151AP to restore your car’s performance and ensure a smoother, more enjoyable driving experience.
●Strict Quality Control: Every batch of our Transmission mount 8K0399151AP undergoes rigorous quality testing, including 100% dynamic balance check, to eliminate vibration and guarantee long-term stability after installation.
●Extended Warranty: We offer at least 1-year warranty — if any issue arises with our Transmission mount 8K0399151AP, we provide fast replacement or repair to keep you worry-free.
●Certified Excellence: Our Transmission mount 8K0399151AP is ISO certified and meets CE standards, ensuring top-tier quality every time.


