AUDI 4G1423055AK Electric Power Steering Rack Pinion 4G0909144K

( Manufacturer Part Number: 4G1423055AK ), ( Type: Rack Pinion ), ( Oe/oem Part Number: 4g1423055ak, 4g1423055an, 4g1423055aa, 4g1423055ba, 4g1423055ch, 4g1423055bq, 4g1423055dc, 4g1423055ea, 4g1423055dj, 4g1423055bg, 4g0423812a, 4g0423832a, 4g0423831, 4g0423811a, 4g1423105e, 4g0909144g, 4g0909144k ), ( Country Of Origin: Germany )

Review AUDI Electric Power Steering Rack And Pinion Oem fits D4 A8 S7 A7 A6 2012–2018

The **Audi 4G1423055AK Electric Power Steering Rack (Pinion Assembly)** is a high-performance, precision-engineered component designed exclusively for Audi s 4-cylinder (4G) vehicles, specifically tailored to models equipped with the **D4 (4-cylinder turbocharged) engine family**, including the **A8, S7, and A7 (4.0T models)**, as well as the **A6 (4.0T)**. This steering rack is part of the **4G0909144K** assembly, featuring an **electric power steering (EPS) system** that integrates seamlessly with the vehicle s advanced driver-assistance and infotainment networks. Engineered to meet Audi s rigorous quality standards, this rack combines **robust durability, smooth operation, and enhanced steering responsiveness** to deliver an engaging and precise driving experience.

The **4G1423055AK** is constructed from **high-grade aluminum alloys**, ensuring a lightweight yet structurally sound design that reduces unsprung weight and improves overall vehicle dynamics. Its **integrated electric motor and gearing system** provide **adjustable steering assist**, allowing for effortless low-speed maneuverability while maintaining firm, direct feedback at higher speeds ideal for both city driving and spirited highway cruising. The rack s **sealed ball-joint connections** and **corrosion-resistant coatings** protect against environmental contaminants, ensuring long-term reliability even in demanding conditions. Additionally, the **modular design** allows for easy installation and compatibility with Audi s **MMI (Multi Media Interface) and steering wheel controls**, including integrated audio and climate system adjustments.

For performance-oriented Audi enthusiasts, this steering rack is a **direct-fit replacement** for the original equipment (OEM) unit, maintaining factory specifications while offering improved longevity and reduced wear. The **4G0909144K pinion assembly** is engineered to work in harmony with the vehicle s **electronic stability control (ESC), traction control, and adaptive cruise control systems**, ensuring seamless integration with modern safety and convenience features. Whether installed in a **high-end A8 L luxury sedan, the sporty S7 coupe, or the versatile A6 Avant**, this steering rack enhances both the **aesthetic and functional integrity** of the vehicle, delivering Audi s signature blend of **premium engineering and driving pleasure**.

For technicians, the **4G1423055AK** is a **drop-in replacement** that requires minimal adaptation, featuring **pre-aligned mounting points and compatible wiring harnesses** for quick and efficient installation. Its **OEM-level quality** ensures compatibility with Audi s **factory calibration settings**, eliminating the need for recalibration in most cases. Whether used in a **restoration project, routine maintenance, or as a preventive replacement**, this steering rack exemplifies Audi s commitment to **precision, performance, and enduring craftsmanship**, making it an indispensable component for maintaining the driving dynamics of these iconic vehicles.

### **Pros and Cons of buying a Audi 4G1423055AK (12-18) D4 A8 S7 A7 A6 Electric Power Steering Rack Pinion (4G0909144K)**

This part is an **electric power steering (EPS) rack and pinion assembly** used in Audi models from the **2012 2018 generation**, including the **A8, S7, A7, and A6**. Below is a detailed breakdown of its advantages and drawbacks, followed by a conclusion and recommendation.

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### **Pros**

1. **Compatibility with Multiple Audi Models**

- This part is designed for several high-end Audi models (A8, S7, A7, A6), making it a versatile choice if you own or plan to own one of these vehicles. It reduces the need for multiple specialized parts.

2. **Electric Power Steering (EPS) Technology**

- Unlike hydraulic systems, EPS reduces weight, improves fuel efficiency, and eliminates the need for power steering fluid. It also provides smoother, more responsive steering, which is particularly noticeable in luxury vehicles.

3. **OEM Quality and Reliability**

- As an **original equipment manufacturer (OEM) part**, it meets Audi s strict engineering standards, ensuring proper fitment, durability, and performance. Aftermarket parts may not always match the precision of OEM components.

4. **Reduced Maintenance Requirements**

- EPS systems have fewer moving parts than hydraulic systems, which means less wear and tear over time. This can lead to lower long-term maintenance costs compared to traditional power steering setups.

5. **Improved Safety and Handling**

- The electronic steering assist adjusts torque based on driving conditions (speed, load, etc.), enhancing stability and control. This is particularly beneficial in high-performance or luxury vehicles where precise handling is critical.

6. **Long Service Life (When Properly Installed)**

- If installed correctly and maintained, this rack and pinion assembly can last **100,000 miles**, though wear depends on driving conditions and usage.

7. **Compatibility with Modern Diagnostics**

- Audi s EPS systems integrate with the vehicle s **electronic control module (ECM)**, allowing for advanced diagnostics and potential adaptive features (e.g., variable assist). This ensures better integration with the car s overall systems.

---

### **Cons**

1. **High Cost**

- OEM parts like this are **expensive**, often costing **$1,200 $2,500 ** depending on the dealer or supplier. This makes it a significant investment, especially for non-luxury vehicle owners.

2. **Complex Installation**

- Replacing an EPS rack requires **specialized tools, expertise, and time**. It involves disconnecting electrical wiring, removing suspension components, and ensuring proper alignment. Improper installation can lead to **steering misalignment, electrical issues, or premature failure**.

3. **Potential Electrical Issues**

- Since EPS relies on **electronic sensors and wiring**, faults in the system (e.g., loose connections, sensor failures, or ECM issues) can cause **steering assist failure, warning lights, or complete loss of power assist**. This requires diagnostic tools to troubleshoot.

4. **Limited Availability of Aftermarket Alternatives**

- While OEM parts are reliable, aftermarket EPS racks may not always match the quality or fitment. Some budget alternatives may lack the same **durability or precision**, leading to premature wear or compatibility problems.

5. **Potential for Water Ingress (In Some Models)**

- Some Audi models (particularly those with exposed steering components) are prone to **water or road debris entering the EPS system**, causing corrosion or electrical shorts. Proper sealing during installation is crucial.

6. **Warranty and Recalls**

- Even OEM parts can have **manufacturing defects** or **recall issues**. If the part is faulty, Audi may not cover it under warranty unless it s still under the original vehicle warranty.

7. **Specialized Labor Requirements**

- Due to the complexity of EPS systems, **only qualified mechanics** should perform installation or repairs. DIY attempts can void warranties or cause further damage.

---

### **Conclusion**

The **Audi 4G1423055AK EPS rack and pinion (4G0909144K)** is a **high-quality, reliable component** for Audi models from **2012 2018**, offering **superior steering performance, efficiency, and integration** with modern vehicle systems. However, its **high cost, complex installation, and potential electrical sensitivities** make it a **significant commitment** that requires careful consideration.

If you **own or plan to own an Audi A8, S7, A7, or A6** and need a **direct replacement**, this is the **best choice for longevity and performance**. However, if you re on a **tight budget** or dealing with a **non-luxury vehicle**, exploring **aftermarket options (with caution)** or checking for **used OEM parts** may be worth considering.

For **most Audi owners**, the **pros outweigh the cons**, making this a **strong recommendation** **provided the installation is done by a trusted, experienced mechanic** and the vehicle s electrical system is in good condition.

### **Final Recommendation**

- You own an **Audi A8, S7, A7, or A6 (2012 2018)** and need an **OEM replacement**.

- You have **budgeted for the high cost** and are prepared for **professional installation**.

- You prioritize **long-term reliability and steering performance**.

- You re working with a **non-Audi vehicle** or a **budget-friendly car**.

- You lack access to **specialized mechanics** for installation.

- You re unsure about **electrical diagnostics** in your vehicle.

- **Get a professional inspection** before purchasing to ensure compatibility.

- **Compare quotes** from multiple suppliers (dealer vs. third-party) for the best price.

- **Ensure proper installation** to prevent future issues.

For most Audi enthusiasts, this part is **worth the investment** for its **quality, efficiency, and integration** with modern luxury vehicles.

Details:

Complete with steering stub shaft. Oem genuine used. Perfect for those looking to replace their current steering rack and pinion with a reliable authentic Audi part. This genuine OE OEM original part is comfortable with Audi vehicles such as A6, A7, A8, and S7, ensuring high quality compatibility for a smooth steering experience.

Electric steering rack with inner and outer tie rods. The product is an OEM Audi electric power steering rack and pinion assembly specifically designed for model's from 2012 to 2018. In great working condition.

part #: 4g1423055ak prices

• $249.99-$850.00

specifications steragebo:

• for models: D4, A8, S7, A7, A6
• for makes: Audi
• for years: 2012-2018
• mpn: 4g1423055ak
• type: Rack Pinion
• oe/oem part number: 4g1423055ak, 4g1423055an, 4g1423055aa, 4g1423055ba, 4g1423055ch, 4g1423055bq, 4g1423055dc, 4g1423055ea, 4g1423055dj, 4g1423055bg, 4g0423812a, 4g0423832a, 4g0423831, 4g0423811a, 4g1423105e, 4g0909144g, 4g0909144k
• country of origin: Germany

seller steragebo:

• city: Saint Augustine, Florida
• rating: 99.6%
• # reviews: 18999

general steragebo:

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

returns steragebo:

• policy: No Returns

shipping steragebo:

• class: Standard
• service: UPS Ground
• carrier: UPS
• type: Calculated
• transit: 4-8 Days
• cost: $154.37

payments steragebo:

• credit card: Discover
• wallet: Google-pay
• other

offer steragebo:

• options: Ship-to-home
• availability: In Stock
• started: February 19, 2026
• sold: 0
• quantity: 1

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