AUDI 7L8521105L Rear Driveshaft Propeller Shaft 4L 3.0L 79K

( Manufacturer Part Number: 7L8521105L ), ( Type: Driveshaft ), ( Oe/oem Part Number: 7l8521105l, 7l8521102s ), ( Placement On Vehicle: Rear ), ( Country Of Origin: Germany )

Review AUDI 4l 3.0l Rear Driveshaft Propeller Shaft 79k Miles Oem fits Q7 AWD 2011–2015

The **Audi 7L8521105L Rear Driveshaft (Propeller Shaft)** for the **2011 2015 Q7 4.2L or 3.0L TFSI AWD models** is a precision-engineered component designed to deliver seamless power transfer from the transmission to the rear axle in Audi s advanced Quattro all-wheel-drive system. Crafted from high-grade, heat-treated steel, this driveshaft is built to withstand the rigorous demands of high-performance driving, ensuring durability and reliability even under heavy loads, aggressive acceleration, or off-road conditions. The shaft features a robust **spline connection** at both ends, precisely matched to the **Audi 0B5 or 0C5 rear axle** and the **7-speed S tronic or 6-speed Tiptronic transmission**, guaranteeing a secure and vibration-free transfer of torque. Its **balanced construction** minimizes noise, vibration, and harshness (NVH), providing a smooth and refined driving experience that aligns with Audi s signature luxury and precision engineering. The **protective rubber boots** at each end shield the splines from contaminants, moisture, and road debris, extending the lifespan of the driveshaft and reducing maintenance requirements. Whether navigating city streets, winding mountain roads, or tackling light off-road terrain, this driveshaft ensures optimal performance and longevity, making it an essential replacement part for Audi owners seeking to restore factory-level reliability to their Q7. Its compatibility with both the **3.0L TFSI V6** and **4.2L V8** engines further solidifies its versatility, catering to a wide range of Audi performance needs.

### Pros and Cons of Buying a 2011 2015 Audi Q7 (4L 3.0L AWD) with the 7L8521105L Rear Driveshaft/Propeller Shaft

#### **Pros**

1. **Strong Engine and Performance**

The 3.0L V6 (313 hp in the S line, 245 hp in the standard model) paired with a 7-speed S tronic transmission provides smooth acceleration and responsive handling. The AWD system ensures reliable traction in various conditions.

2. **Luxury and Comfort**

Audi s interior is known for high-quality materials, ergonomic seating, and advanced infotainment (especially in later models with MMI navigation). The spacious cabin and premium features like heated seats, leather upholstery, and ambient lighting enhance comfort.

3. **Reliability of the 3.0L V6**

The 3.0L VR6 engine (used in these years) is generally robust if maintained properly. With regular oil changes and attention to timing belt/chain (depending on model), it can last well over 200,000 miles. The 7-speed dual-clutch transmission (S tronic) is also durable when serviced correctly.

4. **AWD Capability**

The permanent AWD system is beneficial for snow, rain, or off-road conditions, making it a practical choice for drivers in varied climates.

5. **Resale Value**

Audi Q7 retains decent resale value compared to some luxury competitors, especially if well-maintained. The 3.0L models are less common than the 3.0T, which can be an advantage.

6. **Safety Features**

Many 2011 2015 Q7 models come equipped with standard safety tech like stability control, traction control, and side airbags. Some later models include adaptive cruise control and lane departure warning.

7. **Spacious and Practical**

The Q7 s large interior (seating up to 7 passengers) and cargo space (up to 20.5 cu. ft. in the base model) make it ideal for families or those needing extra room.

---

#### **Cons**

1. **Transmission Issues (S tronic)**

The 7-speed S tronic dual-clutch transmission is notorious for reliability problems, particularly in the 2011 2015 models. Common issues include:

- Rough shifting or hesitation.

- Clutch wear leading to premature failure (often requiring a rebuild or replacement).

- Electronic gremlins causing erratic behavior.

A transmission rebuild can cost **$3,000 $5,000**, and parts may be expensive. Some owners opt for a manual transmission conversion (if available) or a used ZF 6-speed automatic (less common but more reliable).

2. **High Maintenance Costs**

Audi parts and labor are expensive. Regular maintenance (timing belt/chain, suspension, electrical components) adds up quickly. The 3.0L V6, while durable, requires high-quality oil (Audi recommends 5W-40) and timely servicing to avoid engine issues.

3. **Electrical Problems**

- Flickering screens or dead infotainment systems.

- Faulty sensors (e.g., wheel speed sensors, camshaft sensors) triggering check engine lights.

- Heating/cooling system malfunctions.

These problems can be costly to diagnose and repair.

4. **Suspension Wear**

The Q7 s heavy weight (up to 5,000 lbs with options) stresses the suspension. Bushings, struts, and control arms often wear out by 80,000 100,000 miles, requiring frequent replacements.

5. **Fuel Economy**

The 3.0L V6 is thirsty, averaging **16 18 MPG combined** (worse in AWD mode). Higher trim levels with more power (e.g., S line) will be even less efficient.

6. **Rear Driveshaft/Propeller Shaft (7L8521105L) Concerns**

- **Fluid leaks** from the transfer case or differentials.

- **Bearing wear** in the rear axle or transfer case, leading to noise or vibration.

- **Electronic AWD faults** causing the system to disengage unexpectedly.

A thorough inspection of the driveshaft, transfer case, and rear axle is critical before purchase. Replacement parts can be expensive, and labor-intensive repairs (e.g., transfer case rebuilds) may be needed.

7. **Depreciation**

Audi s luxury vehicles depreciate quickly. A 2011 2015 Q7 will likely be worth significantly less than its original price, especially if transmission or electrical issues arise.

8. **Parts Availability and Scarcity**

As these models age, finding OEM parts (especially for the transmission or electrical components) can be challenging. Aftermarket parts may not fit perfectly or last as long.

9. **Rust and Corrosion**

If the vehicle was driven in snowy or salted climates, rust in the wheel wells, subframe, and undercarriage can become a long-term issue. A pre-purchase inspection should check for rust damage.

10. **Resale Market Challenges**

Buyers may be hesitant to purchase a used Q7 with a known transmission history, making it harder to sell later. The stigma around the S tronic transmission can lower resale value.

---

### **Key Considerations Before Buying**

1. **Transmission History**

- Ask for **service records** proving the transmission has been rebuilt or serviced.

- Check for **rough shifting, delayed engagement, or clutch slippage**.

- Consider a **pre-purchase inspection (PPI)** by a trusted mechanic specializing in Audi transmissions.

2. **Driveshaft and AWD System**

- Inspect for **leaks, unusual noises (whining, clunking), or vibration**.

- Test drive in **AWD mode** to ensure smooth engagement and no warning lights.

- Verify the **transfer case and rear axle fluid levels** low or burnt fluid is a red flag.

3. **Electrical System**

- Test all **electronic features** (infotainment, climate control, sensors).

- Look for **corrosion in connectors** or **flickering dashboard lights**.

- Check for **check engine lights** even if they re cleared, they may return.

4. **Maintenance Records**

- Ensure **timing belt/chain service** (if applicable) was done on time.

- Confirm **suspension components** (struts, bushings) have been replaced if needed.

- Verify **oil changes** were done with **Audi-approved oil** (not cheap synthetic substitutes).

5. **Budget for Repairs**

- Be prepared for **$2,000 $5,000 in unexpected repairs** (transmission, electrical, suspension).

- Factor in **long-term costs** (insurance, maintenance, potential resale depreciation).

---

### **Conclusion and Recommendation**

- You **prioritize luxury and space** over fuel efficiency or low maintenance costs.

- You **find a well-documented example** with a **rebuilt transmission** and **no major AWD/driveshaft issues**.

- You re **prepared to budget for potential repairs** (especially transmission and electrical).

- You **plan to keep the vehicle for 5 7 years** and can afford the upkeep.

- You **live in a climate where AWD is beneficial** (snow, rough roads).

- You **cannot afford transmission repairs** (the S tronic is the biggest risk).

- You **find electrical gremlins** (infotainment, sensors, climate control).

- The **driveshaft or AWD system shows signs of wear** (leaks, noise, vibration).

- You **don t have access to maintenance records** or the seller refuses a PPI.

- You **prioritize reliability over luxury** consider a **Toyota Land Cruiser, Mercedes GL-Class, or BMW X5** (with a proven transmission) instead.

- **Get a pre-purchase inspection** from an **Audi specialist** (not just a general mechanic).

- **Test drive in AWD mode** and listen for **unusual noises** in the driveshaft or transfer case.

- **Negotiate aggressively** if the vehicle has **known issues** (e.g., transmission rebuild needed).

- **Consider a used ZF 6-speed automatic conversion** if the S tronic is problematic (though this adds cost).

The **2011 2015 Audi Q7 3.0L AWD with the 7L8521105L driveshaft** can be a **great luxury SUV** if you **mitigate the transmission and electrical risks**. However, the **potential for costly repairs** makes it a **high-risk purchase** unless you re **financially prepared** or find a **exceptionally well-maintained example**.

If you

Details:

Local Pick-up: If you prefer local in-person pickup, it is possible. Please carefully review the photos and of items condition fitments before making a purchase to avoid any misunderstandings. In such cases, we'll reach out to you after the purchase discuss delivery costs. 7L8521105L / 7L8521102S, 002-9574, Vehicle Fitment, Year: Make: model: Body Trim: Engine Transmission: 2015 AudiQ7Premium, Premium Plus, Prestige3.0L V6 - Gas, 2014 AudiQ7Premium, 2013 AudiQ7Premium, 2012 AudiQ7Premium, 2011 AudiQ7Premium, Gas.

The left side means the Drivers and Right Passenger mileage information about donors car can be found on label in pictures.

part #: 7l8521105l prices

• $176.16-$190.97

specifications universajoin:

• for models: Q7, Awd
• for makes: Audi
• for years: 2011-2015
• mpn: 7l8521105l
• type: Driveshaft
• oe/oem part number: 7l8521105l, 7l8521102s
• placement on vehicle: Rear
• country of origin: Germany

payments universajoin:

• other
• credit card: Discover
• wallet: Paypal

general universajoin:

• Transmission Drivetrain > Driveshafts Parts > Driveshafts
• condition: Used

returns universajoin:

• time: 30 Days
• paid by: Buyer
• policy: Returns Accepted

offer universajoin:

• options: Ship-to-home
• started: May 8, 2026
• best offers: True
• sold: 0
• availability: In Stock
• quantity: 1

shipping universajoin:

• cost: $97.00
• type: Fixed
• carrier: FedEx
• transit: 3-6 Days
• service: FedEx Ground / FedEx Home Delivery
• class: Standard

seller universajoin:

• # reviews: 14920
• rating: 99.9%
• city: River Grove, Illinois

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