MERCEDES 651-090-05-66 Vacuum Cell Benz

( Manufacturer Part Number: 651-090-05-66 ), ( Part Type: Vacuum Cell ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Universal Fitment: Direct Replacement ), ( Make: Mercedes-benz ), ( Year: 2014 2015 2016 ), ( Parts Included: Only Part Reference 0 On The Diagram Is Included )

Review MERCEDES benz Genuine Vacuum Cell fits E250 2014–2016

The **Mercedes-Benz 651-090-05-66 Vacuum Cell** is a high-performance, precision-engineered component designed specifically for the brand s advanced turbocharged engines, ensuring optimal air intake efficiency and reliable operation under demanding conditions. This critical part serves as a vital component within the engine s intake system, housing the **vacuum sensor** and **vacuum hose connection**, which are essential for monitoring and regulating the engine s boost pressure, intake manifold vacuum, and overall performance. Crafted from durable, corrosion-resistant materials, the vacuum cell is built to withstand the harsh environments of high-performance driving, exposure to engine heat, and the constant fluctuations in pressure that occur during acceleration, deceleration, and idling. Its robust construction minimizes the risk of leaks, ensuring consistent vacuum readings for the engine control unit (ECU), which in turn optimizes fuel delivery, throttle response, and emissions compliance.

The **651-090-05-66** is meticulously designed to integrate seamlessly with Mercedes-Benz s **M276, M278, and M279 engine families**, commonly found in models such as the **E63 AMG, C63, G63, and S63**, where turbocharged performance is paramount. Its compact yet sturdy design allows for easy installation, even in tight engine bays, while its precise tolerances guarantee a snug fit with the intake manifold and associated hoses. The internal components, including the **vacuum sensor port** and **O-ring seals**, are engineered to maintain a perfect vacuum seal, preventing air leaks that could compromise engine efficiency or trigger warning lights on the dashboard. Additionally, the cell s design incorporates **reinforced mounting points** to absorb minor vibrations, reducing wear on the sensor and prolonging the lifespan of the entire intake system.

For enthusiasts and mechanics alike, the **Mercedes-Benz 651-090-05-66 Vacuum Cell** represents a blend of **German engineering precision and reliability**, ensuring that every high-performance Mercedes-Benz continues to deliver the power, responsiveness, and refinement expected from the brand. Whether used in a daily driver, a track-focused AMG model, or a restored classic, this component is a testament to Mercedes-Benz s commitment to performance and durability. Proper installation, using genuine O-rings and high-quality vacuum hoses, is recommended to maintain optimal functionality and prevent premature failure, ensuring that the engine operates at its peak every time.

### **Mercedes-Benz Part Number 651-090-05-66 (Vacuum Cell) Pros and Cons**

#### **Overview**

The **Mercedes-Benz 651-090-05-66** is a **vacuum cell** (also called a **vacuum reservoir** or **vacuum pump cell**) used in the **E320 (W210) and other models** with the **M112 engine** (2000 2005). It helps maintain proper vacuum levels in the engine s intake system, improving performance and emissions control.

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### **Pros of Buying This Part**

1. **OEM Quality and Fit**

- Direct replacement for the original Mercedes-Benz component, ensuring a perfect fit without modifications.

- Made from durable materials (likely plastic and metal) designed to withstand engine vacuum pressures.

2. **Reliability and Longevity**

- High-quality construction reduces the risk of leaks or failure, which can cause **rough idle, stalling, or check engine lights (P0171/P0174)**.

- Fewer issues compared to aftermarket knockoffs, which may crack or deform over time.

3. **Compatibility with Common Issues**

- Fixes **vacuum leaks**, which are a frequent problem in older M112 engines due to aging hoses and seals.

- Helps resolve **idling problems, rough acceleration, or MAF sensor errors** caused by vacuum fluctuations.

4. **Ease of Installation**

- Relatively straightforward to replace, requiring only basic tools (screwdrivers, pliers, and possibly a vacuum pump for bleeding).

- No wiring or complex disassembly needed just unclipping and replacing the old cell.

5. **Cost-Effective Fix for Engine Problems**

- Replacing a faulty vacuum cell is **far cheaper** than dealing with secondary issues (e.g., carbon buildup, MAF sensor replacement, or even engine tuning).

- Prevents more expensive repairs down the line by maintaining proper vacuum levels.

6. **Widely Available (New & Used)**

- Easy to find on **eBay, Amazon, RockAuto, or Mercedes-Benz dealership parts departments**.

- Both **new OEM parts** and **high-quality aftermarket replicas** (e.g., **Dorman, Fel-Pro, or local European parts suppliers**) are available.

7. **Supports Emissions Compliance**

- A failing vacuum cell can trigger **smog check failures** in regions with emissions testing.

- Replacing it ensures the engine runs within factory specifications, avoiding potential legal or registration issues.

---

### **Cons of Buying This Part**

1. **Potential Counterfeit or Low-Quality Parts**

- Crack under vacuum pressure.

- Leak air, causing the same issues as a failed original.

- Have poor sealing, leading to repeated problems.

- **Solution:** Buy from **reputable suppliers** (e.g., **Mercedes-Benz dealerships, RockAuto, or verified eBay sellers with positive feedback**).

2. **Age-Related Wear in the Engine System**

- If the **intake manifold, hoses, or seals** are degraded, replacing just the vacuum cell may not fully resolve vacuum leaks.

- **Solution:** Inspect and replace **all related components** (hoses, gaskets, vacuum lines) during installation.

3. **Limited Lifespan in High-Mileage or Abused Engines**

- In engines with **extreme mileage, poor maintenance, or frequent hard acceleration**, the vacuum cell may fail again sooner.

- **Solution:** Consider **preventative maintenance** (e.g., replacing hoses every 50,000 100,000 miles).

4. **Mild Symptoms May Persist**

- If the issue is **not just the vacuum cell but also a failing MAF sensor, carbon buildup, or intake leaks**, symptoms like **rough idle or poor acceleration** may not disappear completely.

- **Solution:** Perform a **diagnostic scan** (e.g., with **OBD-II tools**) to check for other faults.

5. **Installation Can Be Tricky for Beginners**

- While not extremely difficult, **misalignment or improper sealing** can cause leaks.

- **Solution:** Follow a **step-by-step guide** (e.g., from **YouTube or Mercedes-Benz repair manuals**) and take your time.

6. **Price Variability**

- **New vs. used** (new OEM is $80 $120, aftermarket $20 $50).

- **Supplier reputation** (dealership parts are pricier but more reliable).

- **Solution:** Compare prices and read reviews before purchasing.

---

### **Conclusion**

The **Mercedes-Benz 651-090-05-66 vacuum cell** is a **practical and cost-effective solution** for fixing **vacuum-related engine issues** in compatible models. Its **OEM quality, reliability, and ease of installation** make it a **strong choice** for most owners experiencing **idling problems, check engine lights, or performance drops**.

However, **buyers must be cautious of counterfeit parts** and ensure the **entire intake system is in good condition**. If the engine has **other underlying issues**, replacing just the vacuum cell may not fully resolve symptoms.

For **best results**, purchase from a **trusted supplier**, inspect related components, and follow proper installation procedures.

---

### **Final Recommendation**

- You have **confirmed vacuum cell failure** (leaks, cracks, or symptoms like rough idle).

- You want a **direct OEM replacement** for reliability.

- You re willing to **inspect and replace related hoses/seals** for long-term fixes.

- You suspect **other engine issues** (MAF sensor, carbon buildup) without diagnosing them first.

- You re purchasing from an **unverified seller** with no return policy.

- You re on a **tight budget** and can t afford potential secondary repairs.

1. **Confirm the issue** with an **OBD-II scan** (look for **P0171/P0174** or vacuum-related codes).

2. **Buy from a reputable source** (e.g., **RockAuto, eBay with positive feedback, or a Mercedes-Benz parts store**).

3. **Replace the vacuum cell and check all hoses/seals** for leaks.

4. **Test drive the car** to ensure symptoms are resolved.

- If the engine is **high-mileage or abused**, consider **upgrading to a high-quality aftermarket vacuum cell** (e.g., **Dorman or Fel-Pro**) for better durability.

- If the issue persists, **inspect the intake manifold gasket** or **MAF sensor** as potential culprits.

The **651-090-05-66 is a solid, necessary replacement** for most owners with vacuum-related problems. With proper sourcing and installation, it provides a **reliable fix** without major drawbacks.

Details:

Parts must be resealable and in the original packaging. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Electrical parts are not returnable.

part #: 6510900566 prices

• $139.62-$199.18

specifications emissyste:

• for models: E250
• for makes: Mercedes
• for years: 2014-2016
• mpn: 651-090-05-66
• part type: Vacuum Cell
• genuine oem: Yes
• manufacturer warranty: 1 Year
• universal fitment: Direct Replacement
• make: Mercedes-benz
• year: 2014 2015 2016
• parts included: Only Part Reference 0 On The Diagram Is Included

general emissyste:

• Car Truck Parts Accessories > Exhaust Emission Systems > Other Exhaust Emission Parts
• condition: New

offer emissyste:

• quantity: 1
• started: April 2, 2026
• availability: In Stock
• options: Ship-to-home
• sold: 0

seller emissyste:

• city: Farmington, Utah
• rating: 99.3%
• # reviews: 1265

payments emissyste:

• other
• credit card: Mastercard
• wallet: Paypal

returns emissyste:

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

shipping emissyste:

• cost: $18.16
• transit: 4-8 Days
• class: Standard
• service: FedEx Ground / FedEx Home Delivery
• carrier: FedEx
• type: Fixed

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