1. Engine Crankshafts Products
  2. sku: 18710277077875793
  3. MERCEDES S500

MERCEDES Crankshaft 303.MB1Q01 Benz 5.0L

fits model: S500, 303. make: Mercedes. year: 2000–2006.

303.mb1q01 Mercedes-benz 2000-2006 S500 Crankshaft 5.0l 453082

( Manufacturer Part Number: S500 ), ( Part Type: Crankshaft ), ( Conditions Options: Eng. ), ( Genuine Oem: Yes ), ( Ipn: 303.mb1q01 ), ( Make: Mercedes-benz ), ( Warranty: 90 Day )

Review MERCEDES benz Crankshaft 5.0l fits S500 303 2000–2006

The **Mercedes-Benz 303.MB1Q01 (2000 2006) S500 5.0L V8 Crankshaft** is a precision-engineered component designed to deliver the uncompromising performance and reliability expected from one of the most iconic luxury vehicles of the early 2000s. This crankshaft is a critical part of the legendary **M113 5.0L V8 engine**, a powerplant renowned for its smooth operation, robust construction, and the ability to produce over **300 horsepower** when paired with the correct supporting components. Crafted from high-grade **forged steel**, the crankshaft features a **five-main-bearing journal design**, ensuring optimal stability and durability under the high stress of high-performance driving. The **counterweights are meticulously balanced** to minimize vibration, a hallmark of Mercedes-Benz engineering, which contributes to the legendary refinement of the S-Class. This crankshaft is compatible with the **S500 (W221) models** produced between **2000 and 2006**, making it an essential replacement for engines experiencing wear, damage, or those seeking enhanced performance through upgrades. Whether restoring a classic S500 to its former glory or upgrading an existing engine for increased torque and longevity, this crankshaft serves as the backbone of a powerplant that demands both precision and power. Its **hardened journals and polished surfaces** ensure smooth operation, while its **precision machining** guarantees a perfect fit within the engine block, maintaining the integrity of the original M113 architecture. For enthusiasts and mechanics alike, this crankshaft represents the perfect blend of **German engineering excellence** and **high-performance reliability**, ensuring that every revolution of the engine delivers the seamless power and elegance that defines the Mercedes-Benz S-Class.

### **Pros and Cons of Buying a Mercedes-Benz 303 MB1Q01 (2000 2006) S500 (5.0L V8 Crankshaft Engine)**

#### **Pros**

1. **Power and Performance**

The S500 s 5.0L V8 (M117) produces **347 381 hp** (depending on model year and tuning) and **346 lb-ft of torque**, making it one of the most powerful naturally aspirated Mercedes engines of its era. It accelerates quickly (0-60 mph in 5.5 6.5 seconds in stock form) and handles well for its size.

2. **Luxury and Comfort**

The 303 series is a full-size luxury sedan with a spacious, high-quality interior. Features like power everything, leather upholstery, and refined ride comfort make it a comfortable daily driver or long-distance cruiser.

3. **Reliability (With Proper Maintenance)**

The M117 engine is robust if maintained correctly. Many examples last **200,000 miles** with regular oil changes, valve adjustments, and timing belt replacements. The **crankshaft position sensor (CPS) failure** is a known issue, but it s often fixable with a replacement sensor or tuning.

4. **Modding Potential**

The S500 is a favorite among tuners. Aftermarket support is strong, with options for **ECU tuning (e.g., Haltech, MHD), forced induction (turbo/supercharger), and engine upgrades** (e.g., crankshaft balancing, camshafts). Many owners push **500 hp** with minimal modifications.

5. **Classic Mercedes Prestige**

The S500 is a **status symbol** and a well-respected model in the Mercedes lineup. Its **distinctive grille, aggressive stance, and V8 growl** make it stand out on the road.

6. **Availability of Parts**

While some components are aging, **Mercedes-Benz still supports the 303 platform**, and aftermarket parts (especially for the M117 engine) are widely available.

7. **Potential for Low Mileage Examples**

Some S500s were sold in **limited quantities** (especially in certain markets), meaning well-maintained examples with **under 100,000 miles** can be found.

---

#### **Cons**

1. **Crankshaft Position Sensor (CPS) Failure**

The **most common and critical issue** is a **failing CPS**, which can cause **hard stalls, no-start conditions, or rough idle**. Replacement sensors are **expensive ( $500 $800 installed)** and may fail again if the engine is not properly tuned afterward.

2. **High Maintenance Costs**

- **Timing belt and water pump replacement** ( $1,000 $1,500) is **critical** failure can destroy the engine.

- **Valvetronic system** (variable intake valve control) can fail, requiring **replacement or tuning adjustments**.

- **Fuel injectors** and **fuel pump** wear out over time and can be costly to replace.

- **Transmission (7G-Tronic or 722.6)** can be finicky, with **clutch and torque converter issues** in some cases.

3. **Fuel Economy**

The **5.0L V8 guzzles gas** expect **12 15 MPG highway** in stock form. Tuned examples will be even worse.

4. **Rust and Body Issues**

Many 2000 2006 Mercedes suffer from **rust in wheel wells, sills, and undercarriage**, especially in snowy or coastal regions. A **full rust inspection** is essential before purchase.

5. **Electrical Gremlins**

The **infotainment system (if equipped), windows, and power seats** can develop **random failures** due to aging wiring and connectors.

6. **Depreciation and Resale Value**

The **303 series is not a great long-term investment** resale value drops quickly compared to newer Mercedes models.

7. **Weight and Handling**

The **S500 is heavy** ( 4,000 lbs), making it **less nimble** than smaller luxury cars. While it drives well, it s not a sporty or agile vehicle.

8. **Emissions and Modern Compliance**

Some states have **strict emissions laws**, and a **stock S500 may not pass smog checks** without modifications (e.g., tuning for OBD-II compliance).

---

### **Ending Conclusion**

The **Mercedes-Benz 303 S500 (2000 2006) with the 5.0L V8 crankshaft engine** is a **fantastic choice for enthusiasts who prioritize power, luxury, and modding potential** but only if the buyer is **prepared for high maintenance costs and potential reliability issues**. It is **not** a **plug-and-play** luxury sedan for those who want a hassle-free experience.

**Best for:**

- **Enthusiasts who enjoy tuning and modifying** their cars.

- **Owners who can afford and perform regular maintenance** (oil changes, timing belt, CPS monitoring).

- **Those who value the S500 s raw power and classic Mercedes prestige** over modern convenience.

**Not ideal for:**

- **Budget-conscious buyers** (expect **$5,000 $15,000 in repairs** over 5 10 years).

- **Those who want a reliable, low-maintenance daily driver** (consider a **W210 E500 or W204 E55 AMG** instead).

- **People in states with strict emissions laws** (unless the car is tuned properly).

---

### **Recommendation**

If you **find a well-documented S500 with:**

**Full service records** (especially timing belt, oil changes, and CPS checks).

**No major rust or frame damage**.

**A tuned ECU or proven CPS replacement** (if the original is failing).

**Under 150,000 miles** (preferably under 100,000).

then it can be a **fantastic project car or a high-performance daily** with the right investment.

**If you re not mechanically inclined or unwilling to spend extra on maintenance, consider:**

- A **W210 E500 (2002 2007)** More reliable, still powerful, and easier to maintain.

- A **W204 E55 AMG (2006 2010)** More modern, better handling, and still a great V8.

- A **used luxury sedan with lower ownership costs** (e.g., BMW 550i, Audi S6).

**Final Verdict:**

The **S500 is a great car for the right owner** one who **loves Mercedes, enjoys tuning, and can handle the maintenance**. For everyone else, a **more modern or lower-maintenance alternative** may be wiser.

Details:

Buzz Gardner. Menu 2000 2006 MERCEDES S500 CRANKSHAFT 5.0L 453082.: model S500. Just the option.

Ryan Ferrell. Toggle navigation Menu. All Engines and Transmission must be shipped to a commercial address.

part #: s500 price

  • $154.98

specifications cranshafengin:

  • for models: S500, 303
  • for makes: Mercedes
  • for years: 2000-2006
  • mpn: S500
  • part type: Crankshaft
  • conditions options: Eng.
  • genuine oem: Yes
  • ipn: 303.mb1q01
  • make: Mercedes-benz
  • warranty: 90 Day

general cranshafengin:

  • Car Truck Parts Accessories > Engines Engine Parts > Other Engine Parts
  • condition: Used

shipping cranshafengin:

  • class: Standard
  • carrier: UPS
  • service: UPS Ground
  • type: Fixed
  • transit: 4-11 Days
  • cost: $0.00

returns cranshafengin:

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

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offer cranshafengin:

  • started: February 6, 2026
  • quantity: 1
  • options: Ship-to-home
  • availability: In Stock
  • sold: 0

seller cranshafengin:

  • # reviews: 10872
  • city: Pompano Beach, Florida
  • rating: 99.8%
for models: s500, 303, for makes: mercedes, for years: 2000-2006, part type: crankshaft, conditions options: eng., genuine oem: yes, warranty: 90 day,
manufacturer: mercedes-benz, category: auto parts > car truck parts accessories > engines engine parts > engine parts, sku: 18710277077875793,
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