INFINITI K504142 Power Steering Gear Rack Pinion Gearbox Q60 A0.04

( Manufacturer Part Number: K504142 ), ( Part Type: Steering Pinion Gear Rack ), ( Oe/oem Part Number: Genuine Oem, Nissan, Infiniti ), ( Country Of Origin: Japan ), ( Performance Part: Yes )

Review INFINITI Q60 Power Steering Gear Rack And Pinion Gearbox Oem #a0.04 fits RWD 2017–2022

The **Infiniti K504142 Power Steering Gear Rack and Pinion Assembly (2017-2022 Q60 RWD)** is a precision-engineered component designed to deliver effortless, responsive, and highly accurate steering control for the iconic Infiniti Q60 a vehicle renowned for its blend of sporty handling, luxury refinement, and cutting-edge technology. This rack-and-pinion assembly represents the pinnacle of automotive steering innovation, featuring a robust **A0.04** gear ratio, which optimizes the balance between steering feel and maneuverability, ensuring a direct, engaging drive experience while maintaining the smoothness expected from a high-performance luxury sedan. Crafted from high-grade materials, including durable steel and corrosion-resistant coatings, this steering system is built to withstand the demands of both daily commuting and spirited driving, offering long-term reliability even under rigorous conditions.

The **K504142** rack-and-pinion assembly incorporates a **tie-rod-end integrated design**, eliminating the need for separate tie rods and reducing potential points of failure, thereby enhancing durability and simplifying installation. Its **recirculating ball mechanism** ensures smooth, low-friction operation, minimizing steering effort while providing precise feedback to the driver, which is critical for maintaining control during high-speed maneuvers or tight parking scenarios. The assembly is engineered with **precision-machined pinion gears** that mesh seamlessly with the rack, delivering consistent and predictable steering response, even at extreme angles. Additionally, the **sealed and lubricated internal components** protect against dust, moisture, and debris, reducing wear and extending the lifespan of the system.

For the **Q60 RWD** model (2017-2022), this steering gear is specifically calibrated to complement the vehicle s **all-wheel-drive system and sport-tuned suspension**, ensuring that the steering remains responsive and stable across a wide range of driving conditions, from city streets to winding mountain roads. The **A0.04 gear ratio** strikes an ideal compromise, offering a balance between quick, sharp turns for agile handling and a stable, composed feel at highway speeds. Whether navigating a tight urban environment or enjoying a dynamic drive on a curvy coastal road, this steering assembly ensures that every movement is both intuitive and controlled, reinforcing the Q60 s reputation as a vehicle that seamlessly merges performance with luxury.

Installation of the **K504142** is streamlined thanks to its **direct-fit design**, compatible with the Q60 s steering linkage and mounting points without the need for modifications. The assembly includes **pre-assembled components**, such as the pinion shaft and rack housing, which are pre-lubricated and ready for immediate use, reducing labor time and ensuring optimal performance from the moment it is installed. For enthusiasts and mechanics alike, this steering gear represents a high-quality, factory-spec replacement that restores the Q60 s original steering dynamics, whether it s for routine maintenance, an upgrade after an accident, or a performance enhancement project. With its emphasis on **durability, precision, and driver engagement**, the **Infiniti K504142 Power Steering Gear Rack and Pinion Assembly** is an essential component for maintaining the Q60 s legendary blend of sophistication and driving excitement.

### **Pros and Cons of Buying a 2017 2022 Infiniti Q60 (RWD) with a Power Steering Gear Rack Pinion Gearbox (A0.04) Issue**

#### **Pros**

1. **Premium Luxury and Brand Reputation**

The Infiniti Q60 is positioned as a luxury performance sedan, offering a refined interior, high-quality materials, and a brand with strong resale value. Infiniti has improved its reputation in recent years, particularly in the luxury segment, making it a more attractive choice compared to some competitors.

2. **Strong Engine Options**

The Q60 comes with a **3.7L V6 (VQ37VHR)** or **5.0L V8 (VQ50VE)**, both of which are well-regarded for their power, smoothness, and reliability when properly maintained. The V8, in particular, delivers strong acceleration and a thrilling driving experience.

3. **Performance and Handling**

The RWD configuration provides excellent handling dynamics, making it more engaging than FWD or AWD models. The Q60 s suspension tuning strikes a balance between comfort and sportiness, appealing to those who want a premium yet responsive driving experience.

4. **Infotainment and Tech Features**

The Q60 includes a **large touchscreen infotainment system**, Apple CarPlay, Android Auto, and available features like a **head-up display, 12-speaker Harman Kardon audio system, and advanced driver aids**. The 2020 models received significant updates, including a more intuitive infotainment interface.

5. **Reliability of Core Components**

The **3.7L V6 and 5.0L V8 engines** are known for durability if maintained properly. The **automatic transmission (ZF 8-speed)** is also reliable, though some owners report minor issues with shift quality over time. The **AWD system (if equipped)** is robust and performs well in various conditions.

6. **Resale Value**

Infiniti has been improving its resale retention rates, and the Q60 holds its value better than many luxury competitors. This means you may recover a significant portion of your investment when selling or trading in.

7. **Available Performance Upgrades**

The Q60 is a popular candidate for **tuning and modifications**, particularly with aftermarket exhaust, suspension upgrades, and performance chips. The V8 model, in particular, benefits greatly from tuning.

8. **Comfort and Practicality**

The Q60 offers a **spacious cabin** with premium seating, good visibility, and a quiet interior. It s a practical luxury sedan that can comfortably seat five passengers with adequate legroom.

---

#### **Cons**

1. **Power Steering Gear Rack Pinion Gearbox (A0.04) Issue**

The **most significant and widespread problem** with the 2017 2022 Q60 is the **failing power steering gear rack (A0.04 code)**. This issue manifests as:

- **Excessive play or looseness in the steering wheel** (feels like a "dead zone" at low speeds).

- **Whining or grinding noises** from the steering column.

- **Difficulty in precise steering**, especially at parking speeds.

- **Eventual complete failure**, where the steering becomes unresponsive.

- **Recalls and partial fixes** have been issued, but the problem persists in many vehicles. Infiniti has offered **limited warranties or rebates**, but coverage is inconsistent.

- **Replacement of the steering rack** typically costs **$1,200 $2,500** (parts labor), depending on the dealer or shop.

- Some owners have reported **DIY fixes or third-party rack replacements** being cheaper, but quality varies.

- **Extended warranties or service contracts** may cover this, but they are expensive upfront.

- The steering issue **dramatically reduces the car s resale value** and desirability. Buyers and appraisers will heavily discount it.

- Some dealerships may refuse to take it back due to the recurring issue.

2. **Transmission Issues (ZF 8-Speed)**

- **Delayed or rough shifts**, particularly in cold weather.

- **Transmission fluid leaks** (requiring frequent top-ups).

- **Electronic glitches** (e.g., shifting into the wrong gear).

- **ZF transmissions are generally reliable**, but the Q60 s implementation has some quirks.

3. **Infotainment Lag and Software Glitches**

The **infotainment system (especially pre-2020 models)** can be slow to respond, with occasional **freezing or app crashes**. Apple CarPlay/Android Auto integration is better in newer models but still not as smooth as competitors like BMW or Mercedes.

4. **Maintenance Costs**

- **High-quality parts and labor** at Infiniti dealerships can be expensive.

- **Oil changes** should use **full synthetic (5W-30 or 0W-20)** to protect the turbocharged V6/V8.

- **Timing belt replacement** is critical (every **60,000 100,000 miles**) failure can cause catastrophic engine damage.

5. **Rear Seat Comfort and Space**

- The **rear seats are narrow and less comfortable** for tall passengers or long trips.

- **Legroom is adequate but not exceptional** compared to rivals like the BMW 5 Series or Audi A6.

6. **Fuel Economy (V8 Model)**

- The **5.0L V8 is thirsty**, averaging **16 18 MPG combined** not ideal for daily driving.

- The **3.7L V6 is more efficient ( 22 25 MPG)**, but still not great for highway commuting.

7. **Build Quality Variability**

- Some early 2017 2018 models had **lower-quality plastics and fit issues**, though later years improved.

- **Panel gaps and rattles** can be more noticeable than in German luxury rivals.

8. **Limited Off-Road/AWD Capability**

- The **AWD system is not as robust as BMW s xDrive or Audi s Quattro** for severe off-road conditions.

- The **Q60 is not a true performance AWD car** it s more of a comfort-focused system.

---

### **Ending Conclusion**

The **2017 2022 Infiniti Q60 (RWD) is a compelling luxury performance sedan** with a strong engine, engaging driving dynamics, and a refined interior. However, **the power steering rack issue (A0.04) is a dealbreaker for many buyers**, significantly reducing its value and reliability. If you **prioritize driving enjoyment and luxury** and are prepared to **budget for a steering rack replacement**, the Q60 can be a great choice. But if you **value long-term reliability and lower maintenance costs**, the risks may outweigh the benefits.

---

### **Recommendation**

- **Get a pre-purchase inspection (PPI) focused on the steering rack, transmission, and suspension.**

- **Check for service records** if the steering rack has been replaced, ask for proof.

- **Avoid models with active A0.04 codes** unless the owner has documented repairs.

- **Consider the 3.7L V6 over the V8** if fuel efficiency is a concern (though the V8 is more fun to drive).

- **Budget $1,500 $3,000 for the steering rack replacement** upfront.

- **Look for well-maintained examples with low mileage** (under 60,000 miles if possible).

- **Negotiate the price aggressively** expect to pay **20 30% below market value** due to the steering issue.

- Consider a **BMW 5 Series (F10/F11), Audi A6 (C7), or Lexus GS 350** these have fewer recurring issues and better resale value.

- If you love the Q60 s styling and want a newer model, the **2023 Q60 (with updated steering systems)** may be a safer bet, though they are more expensive.

The **Q60 is a fantastic car for the right buyer** one who appreciates its driving dynamics, luxury, and is prepared for potential repairs. However, **the steering rack issue makes it a higher-risk purchase compared to competitors**. If you re set on buying, **prioritize a well-documented example with a fixed steering system and proceed with caution**. Otherwise, explore alternatives with better long-term reliability.

Details:

Make -Infiniti. In good condition. Model Q60 Red Sport. Mileage -87,000.

Comes as you see. Selling a used 2017 2022 Infiniti Q60 RWD power steering rack and pinion assembly.

part #: k504142 prices

• $39.00-$169.15

specifications steragebo:

• for models: Rwd
• for makes: Infiniti
• for years: 2017-2022
• mpn: K504142
• part type: Steering Pinion Gear Rack
• oe/oem part number: Genuine Oem, Nissan, Infiniti
• country of origin: Japan
• performance part: Yes

seller steragebo:

• rating: 99.9%
• # reviews: 1379
• city: Lyman, South Carolina

shipping steragebo:

• service: FedEx Ground / FedEx Home Delivery
• transit: 3-8 Days
• type: Fixed
• carrier: FedEx
• cost: $100.00
• class: Standard

payments steragebo:

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

general steragebo:

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

returns steragebo:

• paid by: Buyer
• time: 14 Days
• policy: Returns Accepted

offer steragebo:

• sold: 0
• quantity: 1
• started: March 2, 2026
• availability: In Stock
• options: Ship-to-home
• best offers: True

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