AUDI 4N0501055L Rear Axle Steering Gear RS7 4K8 4.0L 21K

( Manufacturer Part Number: 4N0501055L ), ( Country Of Origin: Germany ), ( Type: Steering Gear ), ( Partout Id: A-123722079 )

Review AUDI Rs7 4k8 4.0l Rear Axle Steering Gear Assembly Miles Oem fits 2019–2023

The **Audi 4N0 501 055L (2019 2023 RS7 4.0L V8 Rear Axle Steering Gear)** is a precision-engineered, high-performance component designed exclusively for Audi s flagship RS7 model, featuring the iconic 4.0-liter twin-turbocharged V8 (designated **4K8**) that delivers an exhilarating 600 horsepower and 590 lb-ft of torque. This rear axle steering gear is a critical element of the RS7 s advanced **Quattro all-wheel-drive system**, enabling dynamic rear-wheel steering (RWS) for enhanced agility, stability, and cornering precision particularly at high speeds and during aggressive maneuvers. Crafted from high-grade materials and engineered to Audi s exacting standards, this steering gear integrates seamlessly with the RS7 s **8-speed Tiptronic S automatic transmission** and **7-speed S tronic dual-clutch gearbox** variants, ensuring smooth, responsive handling even under extreme loads.

The **4N0 501 055L** is built to withstand the immense forces generated by the RS7 s high-performance powertrain, including the **torque converter and rear differential**, while maintaining optimal alignment and steering accuracy. Its robust construction includes precision-machined gears, sealed bearings, and a durable housing designed to minimize wear and tear, even under prolonged high-performance driving conditions. The steering gear s integration with Audi s **adaptive air suspension** and **dynamic steering systems** further enhances the RS7 s ability to adapt to varying road surfaces, ensuring a balanced and predictable driving experience whether navigating tight corners at the N rburgring or cruising effortlessly on a highway.

For enthusiasts seeking to restore or upgrade their RS7 s rear steering system, this OEM-replacement part ensures compatibility with the **2019 2023 model years**, including facelift iterations, while maintaining the same high-quality standards as Audi s factory specifications. Whether replacing a worn-out component or upgrading an aftermarket build, the **4N0 501 055L** delivers the reliability and performance expected from an Audi RS model, reinforcing the RS7 s reputation as a track-ready supercar with unmatched precision and driving dynamics.

### **Pros and Cons of Buying a 2019 2023 Audi RS7 (4N0 501 055 L, 4.0L V8, RWD with Rear Axle Steering)**

#### **Pros**

1. **Performance and Power**

The RS7 is one of Audi s most powerful and capable models, featuring a **4.0L twin-turbocharged V8 (510 hp, 516 lb-ft torque)** paired with a **7-speed S tronic dual-clutch transmission**. It delivers **0-60 mph in around 3.3 seconds** and a top speed limited to **187 mph**, making it one of the fastest rear-wheel-drive sedans available.

2. **Rear Axle Steering (RAS) Technology**

The **RAS system** (standard on the RS7) enhances agility at low speeds by steering the rear wheels independently, improving maneuverability in tight spaces. This is particularly useful for parking and urban driving, though it has minimal impact at high speeds.

3. **Premium Build Quality and Interior**

The RS7 features a **luxurious, high-end interior** with **premium materials** (Nappa leather, Alcantara, wood/aluminum trim), **adaptive air suspension**, and **Audi s Virtual Cockpit** with a **12.3-inch digital display**. The **heated/ventilated seats, panoramic sunroof, and ambient lighting** contribute to a refined driving experience.

4. **Advanced Driver Assistance Systems**

- **Audi Pre Sense (collision avoidance braking)**

- **Lane Keeping Assist (LKA)**

- **Adaptive Cruise Control (ACC) with Stop & Go**

- **360-degree camera system**

- **Traffic Sign Assist**

These features enhance safety and convenience, though they add complexity to the system.

5. **Exclusive Styling and Brand Prestige**

The RS7 has a **distinctive, aggressive RS badge styling** with **aerodynamic enhancements** (large rear spoiler, active grille shutters, LED matrix headlights). Owning an RS7 carries **Audi s high-performance prestige**, making it a statement car.

6. **Strong Resale Value (Compared to Other RS Models)**

While not as high as a Porsche 911 or Mercedes-AMG, the RS7 retains its value better than most Audi RS models due to its **limited production runs** and **high demand**.

7. **Comfort and Refinement**

The **adaptive air suspension** provides a **smooth ride** on both highways and rough roads. The **sound insulation** is excellent, keeping engine noise at bay, though the V8 remains audible at lower speeds.

8. **Customization Options**

Audi offers **premium customization packages**, including **exclusive paint colors (e.g., "Solar Red," "Deep Black"), unique interior trims, and performance upgrades** (e.g., **RS7 Performance Package with 525 hp**).

---

#### **Cons**

1. **High Cost of Ownership**

- **Purchase Price:** New RS7 models start around **$120,000 **, and used examples (2019 2023) still command **$80,000 $120,000 ** depending on mileage and condition.

- **Maintenance & Repairs:** Audi s **premium parts and labor costs** are significantly higher than mass-market brands. **Twin-turbo V8s require more frequent oil changes (every 5,000 7,500 miles)** and can be prone to **carbon buildup, turbo failure, or timing chain issues** if not maintained properly.

- **Insurance:** The RS7 is one of the **most expensive cars to insure**, with premiums often **2 3x higher** than a standard Audi A8.

2. **Fuel Efficiency is Poor**

The **4.0L V8 is thirsty**, averaging **12 14 MPG combined** (real-world usage may be lower). With **$4 $5/gallon fuel prices**, running costs add up quickly, especially for long commutes or highway driving.

3. **Rear Axle Steering (RAS) Limitations**

While useful in tight spaces, **RAS has minimal impact at high speeds** and can feel **unnecessary or distracting** in normal driving conditions. Some drivers find it **overcomplicated** rather than beneficial.

4. **Weight and Handling Trade-offs**

The RS7 is **heavy ( 4,800 lbs)**, which affects **agility and responsiveness**. While the **RAS helps**, it doesn t fully compensate for the **large size and mass**. The **steering is precise but not as quick as a lighter sports car**.

5. **Software and Tech Glitches**

Audi s **infotainment system (MMI Navigation Plus)** can be **slow and buggy**, with occasional **lag in touchscreen response** or **app connectivity issues**. Over-the-air updates are frequent but sometimes introduce new problems.

6. **Depreciation Remains a Factor**

While better than most RS models, the RS7 still **loses 50% of its value in 5 years**. If you plan to keep it long-term, this is a consideration.

7. **Limited Practicality for Daily Use**

- **Seating:** The **two front seats are wide but not as comfortable for long trips** as a sedan like the A8.

- **Cargo Space:** Only **11.7 cu. ft. behind the rear seats** (expandable to **27.8 cu. ft.** with seats folded), which is **narrower than most luxury sedans**.

- **High Ride Height:** The **adaptive suspension raises the car significantly**, making it feel **less sporty and more like a luxury cruiser**.

8. **Potential Reliability Concerns**

- **Twin-turbo V8s** can develop **carbon buildup, turbo lag, or oil consumption issues** if not maintained properly.

- **Electrical gremlins** (e.g., sensor failures, infotainment freezes) are occasionally reported.

- **Quattro AWD system** is robust but adds complexity, requiring **regular fluid changes**.

9. **Resale Market Competition**

- **Porsche 911, Mercedes-AMG E63, BMW M8** are direct competitors with **strong resale demand**.

- **Used RS7s may sit longer on the market** if buyers prefer a more "drivable" performance car.

10. **Not a Daily Driver for Everyone**

- The **high cost, low fuel economy, and maintenance expenses** make it **less practical** for those who drive frequently.

- **Aggressive styling and loud exhaust** may not appeal to all buyers.

---

### **Conclusion**

The **2019 2023 Audi RS7 (4N0 501 055 L, 4.0L V8, RWD with RAS)** is a **brutally fast, luxurious, and technologically advanced** grand touring car. It excels in **performance, refinement, and prestige**, making it ideal for **enthusiasts who prioritize speed, comfort, and brand status** over practicality.

However, **high ownership costs, poor fuel efficiency, and limited daily usability** make it a **less ideal choice** for those who need a **versatile, cost-effective, or high-mileage vehicle**. If you **drive mostly on highways, have a budget for maintenance, and appreciate Audi s blend of luxury and performance**, the RS7 is a **fantastic purchase**. But if you **prioritize fuel savings, lower costs, or a more practical car**, you may find better alternatives elsewhere.

---

### **Recommendation**

You **prioritize raw performance and luxury** over practicality.

You **have a high income and can afford** the **$100K purchase price $2,000 /year in maintenance**.

You **drive mostly on highways or in low-traffic areas** where speed and comfort matter most.

You **appreciate Audi s brand prestige** and want a **statement car**.

You **plan to keep it for 5 7 years** (to mitigate depreciation).

You **need a fuel-efficient, low-cost-to-own vehicle**.

You **drive frequently in stop-and-go traffic** (high maintenance costs add up).

You **prefer a more engaging, lighter sports sedan** (e.g., Porsche 911, BMW M8).

You **cannot afford unexpected repairs** (turbocharged V8s require diligent maintenance).

You **need maximum cargo space or practicality** (this is a **luxury performance car, not a family hauler**).

#### **Alternatives to Consider**

- **Porsche 911 (Turbo S or Carrera S)** More engaging driving experience, better resale.

- **Mercedes-AMG E63 S** Similar power, slightly more practical, better tech.

- **BMW M8 Competition** More refined

Details:

In such cases, we'll reach out to you after the purchase discuss delivery costs. Please carefully review the photos and of items condition fitments before making a purchase to avoid any misunderstandings. 2022 Audi RS7 Sport back Base 4.0L V8 - Electric/Gas. 2023 Audi A6 Quarto Premium, Premium Plus, Prestige 2.0L L4 - Electric/Gas, 3.0L V6 Electric/Gas.

Local Pick-up: If you prefer local in-person pickup, it is possible. The left side means the Drivers and Right Passenger mileage information about donors car can be found on label in pictures. 2023 Audi RS7 Sport back Base 4.0L V8 - Electric/Gas. 2021 Audi RS7 Sport back Base 4.0L V8 - Electric/Gas.

part #: 4n0501055l prices

• $248.00-$458.22

specifications steragebo:

• for makes: Audi
• for years: 2019-2023
• mpn: 4n0501055l
• country of origin: Germany
• type: Steering Gear
• partout id: A-123722079

seller steragebo:

• # reviews: 14071
• rating: 99.9%
• city: River Grove, Illinois

payments steragebo:

• wallet: Paypal
• credit card: Mastercard
• other

offer steragebo:

• options: Ship-to-home
• best offers: True
• started: April 19, 2026
• availability: In Stock
• sold: 0
• quantity: 1

general steragebo:

• condition: Used
• Car Truck Parts Accessories > Steering Suspension > Gearboxes, Rack Pinions

shipping steragebo:

• cost: $0.00
• type: Fixed
• transit: 4-6 Days
• carrier: UPS, FedEx, USPS
• class: Standard, Expedited
• service: UPS Ground, FedEx Ground / FedEx Home Delivery, USPS Priority Mail

returns steragebo:

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

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