BOSCH KS01000039 Benz Rack Pinion

( Brand: Bosch ), ( Manufacturer Part Number: KS01000039 ), ( Type: Rack And Pinion Assembly ), ( Item Length: 66.900 )

Review BOSCH Rack And Pinion Assembly Mercedes benz fits GL320 ML63 AMG 2007–2011

The **Bosch KS01000039 Rack and Pinion Assembly** is a precision-engineered, high-performance steering component specifically designed for Mercedes-Benz models, including the **GL-Class (GLE) 2007 2011** equipped with the **M276 6.2L V8 (ML63 AMG)** engine configuration. This aftermarket replacement part is meticulously crafted to replicate the factory specifications of the original equipment (OEM) rack and pinion system, ensuring seamless integration with the vehicle s steering geometry, torque steering characteristics, and handling dynamics. Built with **high-grade steel and durable polymer bushings**, the Bosch KS01000039 is engineered to withstand the aggressive driving demands of the AMG-powered GL320, delivering consistent responsiveness, minimal play, and long-term durability even under heavy loads or off-road conditions. The rack features a **tapered roller bearing system** at the pinion end, reducing friction and wear while enhancing steering precision, while the pinion shaft is precision-machined to maintain optimal alignment with the steering column. This assembly is compatible with the **Mercedes-Benz 4.0-inch rack system**, offering a **15:1 steering ratio** for a sporty, direct feel that complements the AMG s powerful V8. The Bosch KS01000030 is also designed with **corrosion-resistant coatings** and **sealed joints** to protect against environmental contaminants, ensuring reliable performance in various climates. Whether installed in a high-performance street machine or a rugged overlanding setup, this rack and pinion assembly provides the robustness and accuracy needed to maintain the GL320 s legendary driving dynamics while offering a cost-effective upgrade over OEM parts. Proper installation, including alignment with the tie rods and steering linkage, is critical to achieving optimal performance and longevity.

### Pros and Cons of Buying a Bosch KS01000039 Rack Pinion for a 2007-2011 Mercedes-Benz GL320 ML63 AMG

1. **OEM Quality and Compatibility** The Bosch KS01000039 is an original equipment (OEM) or high-quality aftermarket replacement designed specifically for the M177 engine family used in your GL320 ML63 AMG. This ensures a precise fit and proper function with the steering system.

2. **Improved Durability** Bosch is a well-regarded manufacturer known for producing durable steering components. The rack pinion is built to withstand the stresses of daily driving, especially in high-performance vehicles like the ML63 AMG, which often experience heavier steering loads.

3. **Enhanced Steering Feel and Precision** A properly functioning rack pinion ensures smooth, responsive steering with minimal play or stiffness. This is particularly important for AMG models, where precise handling is critical for both comfort and performance.

4. **Prevents Leaks and Contamination** Worn or damaged rack pinions can lead to power steering fluid leaks, which can contaminate the system and reduce efficiency. Replacing the rack pinion eliminates this risk, ensuring a clean and leak-free operation.

5. **Compatibility with Upgrades** If you ve modified your vehicle (e.g., added a performance steering rack, upgraded suspension, or tuned the engine), a new rack pinion ensures compatibility with these changes, preventing binding or premature wear.

6. **Warranty Coverage** Many reputable sellers (such as Amazon, RockAuto, or specialty Mercedes-Benz parts suppliers) offer warranties on Bosch components, providing peace of mind against defects.

7. **Easier Maintenance** A new rack pinion reduces the likelihood of future steering-related issues, saving you time and money on repairs down the line.

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1. **High Cost** Bosch OEM or high-quality aftermarket rack pinions are expensive, often ranging between **$800 and $1,500 **, depending on the source and whether labor is included. This can be a significant upfront investment, especially if you re on a tight budget.

2. **Installation Complexity** Replacing a rack pinion requires removing the steering column, disconnecting various components (e.g., tie rods, steering linkage, and power steering lines), and ensuring proper alignment. If you re not experienced with automotive repairs, this job is best left to a professional mechanic, adding to the cost.

3. **Potential for Counterfeit Parts** If purchasing from an untrusted seller (e.g., eBay, Craigslist, or unknown online marketplaces), there s a risk of receiving a **counterfeit or low-quality knockoff**. Always buy from reputable suppliers with return policies and authenticity guarantees.

- **Power steering hoses** (if they re old or cracked)

- **Tie rods** (if worn)

- **Bushings** (if damaged)

- **Steering column components** (if stripped or bent)

These extras can increase the total cost significantly.

5. **Time-Consuming Process** The installation process can take **4-8 hours**, depending on your mechanical skill level. If you re working alone, this may require multiple sessions.

6. **Potential for Overkill** If your rack pinion isn t the primary issue (e.g., you re experiencing leaks but the pinion itself is fine), replacing it unnecessarily adds cost without solving the root problem.

7. **Compatibility with Aftermarket Mods** Some aftermarket steering racks (e.g., from **Sachs, ZF, or custom builders**) may not fit perfectly with the Bosch OEM part, requiring additional adjustments or modifications.

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The **Bosch KS01000039 rack pinion** is a **high-quality, reliable replacement** for your 2007-2011 GL320 ML63 AMG, offering improved durability, steering precision, and long-term reliability. However, the **high cost, installation complexity, and potential for additional required parts** make it a significant investment.

If your rack pinion is **leaking, binding, or showing excessive wear**, replacing it is a **necessary upgrade** to maintain safe and smooth operation. If you re **not experiencing major issues but want to future-proof your vehicle**, the cost may not be justified unless you re also addressing other steering or suspension components.

For **best results**, purchase from a **trusted supplier** (e.g., **Mercedes-Benz dealership, RockAuto, or a reputable online parts store**) and have the installation done by a **qualified mechanic** familiar with AMG vehicles.

- **If your rack pinion is failing (leaks, stiffness, excessive play):** **Proceed with the replacement** it s a critical safety component. Budget for **$1,000 $1,500** (parts labor) and consider replacing **tie rods, hoses, and bushings** simultaneously for long-term reliability.

- **If your rack pinion is still functional but you want an upgrade:** **Research aftermarket alternatives** (e.g., **Sachs or ZF performance racks**) that may offer better steering feel without the OEM price tag. However, ensure full compatibility with your vehicle s modifications.

- **If unsure about symptoms:** **Diagnose first** check for leaks, unusual noises, or binding before committing to a replacement. A **power steering fluid flush and inspection** may reveal if the issue is elsewhere (e.g., a failing pump or contaminated fluid).

**Final Verdict:** The Bosch KS01000039 is a **solid choice for OEM replacement**, but weigh the cost against your vehicle s condition and intended use. If you re driving aggressively or modifying your AMG, prioritizing steering reliability is worth the investment.

Details:

Mercedes-Benz. Intermediate Rack. Steering Rack, Hydraulic Remanufactured. Bosch KS01000039 Rack and Pinion Assembly For 07-11 Mercedes-Benz GL320 ML63 AMG.

Pre-Assembled with inner tier rods. All accessories hardware. Placing an order outside the US is easy.

Genuine replacement for the OEM part. Bosch steering racks are remanufactured to the latest specification following OEM standard. Bosch steering systems are formerly know as ZF . Bosch uses new original components from the NEW production line in its re-man process to ensure like performance and durability.

Mercedes-Benz. Fits what vehicles: 2007 Mercedes-Benz GL320, 2007 2011 ML63 AMG. The rack is of original design and not reverse engineered. Original packaging.

part #: ks01000039 prices

• $393.47-$1873.99

specifications steragebo:

• for models: Gl320, Ml63, Amg
• for makes: Mercedes
• for years: 2007-2011
• brand: Bosch
• mpn: Ks01000039
• type: Rack And Pinion Assembly
• item length: 66.900

shipping steragebo:

• cost: $0.00
• transit: 4-9 Days
• service: Standard
• type: Fixed
• class: Standard

seller steragebo:

• # reviews: 144935
• city: Hempstead, New York
• rating: 99.4%

payments steragebo:

• other
• wallet: Apple-pay
• credit card: Mastercard

offer steragebo:

• options: Ship-to-home
• availability: In Stock
• started: February 8, 2026
• quantity: 5
• sold: 0

general steragebo:

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

returns steragebo:

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

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