1. Engine Crankshafts Products
  2. sku: 19852909638858604
  3. MERCEDES 38394QSWH

MERCEDES 38394QSWH Ap Crankcase Vent Valve

fits make: Mercedes. year: 2006–2011.

38394qswh Replacement Ap For 2006-2011 Mercedes E350 Crankcase Vent Valve 2009

( Manufacturer Part Number: 38394QSWH ), ( Part Type: Valve Vent ), ( Manufacturer Warranty: 12 Month Warranty ), ( Notes: Engine Crankcase Vent Valve ), ( Years: 2009 2007 2006 2010 2008 2011 ), ( Application: Mercedes E350 Crankcase Vent Valve ), ( Cs-sku: 400 )

Review MERCEDES Replacement Ap Crankcase Vent Valve fits E350 2006–2011

The **AP 38394QSWH Crankcase Ventilation Valve** is a precision-engineered component designed exclusively for the **2006 2011 Mercedes-Benz E-Class (E350) models**, serving as a critical element in the vehicle s emissions control and engine ventilation system. This high-performance valve regulates the flow of crankcase gases, ensuring proper pressure balance within the engine s oil pan while preventing harmful blow-by emissions from escaping into the atmosphere. Crafted from durable, corrosion-resistant materials, the valve features a robust internal mechanism that maintains optimal airflow efficiency, reducing oil consumption and minimizing engine wear over time. Its seamless integration into the engine bay s ventilation circuit helps maintain peak engine performance by preventing excessive pressure buildup, which could otherwise lead to leaks or damage to the PCV (Positive Crankcase Ventilation) system. Ideal for both maintenance and replacement applications, this valve adheres to strict OEM specifications, guaranteeing a perfect fit and reliable operation. Whether addressing a failing original component or upgrading for enhanced longevity, the **AP 38394QSWH** delivers the precision and durability expected from a Mercedes-Benz aftermarket solution.

### **Pros and Cons of buying a Part Number AP38394QSWH for a 2006 2011 Mercedes-Benz E350 Crankcase Vent Valve (2009 Model)**

#### **Pros:**

1. **Direct Fitment** This part is specifically designed for the 2009 Mercedes-Benz E350, ensuring compatibility with the crankcase ventilation system. It should install without modifications, reducing the risk of improper sealing or leaks.

2. **OEM-Quality Material** The part appears to be manufactured to Mercedes-Benz standards, which means it should meet the durability and performance expectations of the original equipment. This can help prevent premature failure of the valve, which is critical for maintaining proper crankcase pressure and preventing oil leaks.

3. **Prevents Oil Leaks and Contamination** The crankcase vent valve regulates pressure in the engine bay, preventing oil from being forced into the intake system (where it could foul spark plugs or intake components) or allowing harmful contaminants to enter the crankcase. A functioning valve is essential for long-term engine health.

4. **Easy Replacement** The valve is typically located near the oil filter housing or valve cover and can often be replaced without extensive labor. This makes it a straightforward DIY repair for those with basic mechanical skills.

5. **Cost-Effective Compared to Engine Overhaul** Replacing a faulty crankcase vent valve is a minor repair (usually under $100 $200, including labor if not DIY) compared to the potential cost of an engine rebuild or replacement if oil leaks or contamination go unchecked.

6. **Widely Available** As an aftermarket part, it is likely stocked by multiple suppliers, giving you options for pricing and availability. You can also find genuine Mercedes parts or high-quality alternatives from brands like Bosch, Denso, or local auto parts stores.

7. **Prevents Long-Term Damage** A failing vent valve can lead to oil dilution in the intake system, reduced engine performance, or even catastrophic failure if oil enters the combustion chamber. Replacing it proactively can save thousands in repairs down the line.

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#### **Cons:**

1. **Potential Counterfeit or Low-Quality Parts** Some aftermarket parts, especially those from unknown or discount sellers, may be counterfeit or poorly manufactured. This could result in premature failure, leaks, or improper function. Always purchase from reputable suppliers (e.g., Amazon, RockAuto, local Mercedes specialists, or trusted online retailers).

2. **Mismatched Specifications** While this part is listed for the 2009 E350, there is a slight risk that it may not be an exact match for other years in the 2006 2011 range, particularly if the valve design changed slightly. Verify compatibility with your specific engine variant (e.g., M276 vs. M276 DE) before purchasing.

3. **Installation Challenges** If the valve is stuck due to corrosion or if the surrounding gasket or seals are degraded, installation may require additional effort (e.g., penetrating oil, gasket scraper, or replacement of adjacent seals). This could extend the repair time beyond expectations.

4. **Limited Lifespan** Like any mechanical component, the vent valve can wear out over time, especially if the engine is high-mileage or has been subjected to extreme conditions (e.g., frequent short trips, heavy loads). While this part is durable, it is not indefinite and may need replacement again in the future.

5. **Misdiagnosis Risk** If the symptoms you re experiencing (e.g., oil leaks, check engine lights, or unusual engine behavior) are actually caused by another issue (e.g., a faulty PCV system, oil filter housing gasket, or intake manifold leak), replacing just the vent valve may not resolve the problem. A thorough diagnosis (e.g., smoke test, pressure check) is advisable before purchasing.

6. **Price Variability** Prices for this part can vary significantly depending on the seller. While some offer competitive rates, others may charge premium prices for "genuine" or "new OEM" parts. Always compare prices and read reviews to ensure value.

7. **Labor Costs (If Not DIY)** If you re not comfortable performing the repair yourself, labor costs at a Mercedes dealership or specialty shop can be high (often $150 $300 or more). This increases the total cost of the repair.

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### **Conclusion:**

The **AP38394QSWH crankcase vent valve** is a **reliable and necessary replacement part** for your 2009 Mercedes-Benz E350, provided it is sourced from a trusted supplier and installed correctly. The benefits of replacing a failing valve preventing oil leaks, contamination, and long-term engine damage far outweigh the risks, especially when compared to the potential cost of neglecting the issue.

**Recommendation:**

1. **Verify Compatibility** Double-check that this part number is correct for your specific engine (M276 DE or similar) and year. If unsure, consult a Mercedes repair manual or specialist.

2. **Purchase from a Reputable Source** Buy from a well-known retailer (e.g., RockAuto, Amazon, or a local Mercedes parts store) to avoid counterfeit or low-quality parts. Look for sellers with high ratings and clear return policies.

3. **Prepare for Installation** Gather necessary tools (socket set, gasket scraper, penetrating oil) and be prepared for potential challenges (e.g., stuck valve, degraded seals). If unsure, seek professional help.

4. **Inspect Adjacent Components** While replacing the valve, inspect the oil filter housing gasket, PCV system, and intake manifold for leaks or wear. Address any related issues to ensure a complete repair.

5. **Monitor Post-Installation** After replacement, monitor your vehicle for any unusual noises, oil leaks, or performance changes. If symptoms persist, have the system rechecked.

6. **Consider Genuine vs. Aftermarket** If budget allows, a **genuine Mercedes part** (e.g., from a dealer or authorized supplier) may offer slightly better longevity, though high-quality aftermarket alternatives (e.g., Bosch or Denso) are often just as reliable.

**Final Verdict:** **Proceed with confidence** this is a straightforward and cost-effective repair that will protect your engine from serious damage. Just ensure you source the part correctly and address any accompanying issues during installation.

Details:

12 Month Warranty Fitment Notes: Vehicle: Sub model: 2006 - 2011 Mercedes E350Base, E3504Matic. Components: 3 Expansion Plugs.

part #: 38394qswh price

  • $33.43

specifications cranshafengin:

  • for makes: Mercedes
  • for years: 2006-2011
  • mpn: 38394qswh
  • part type: Valve Vent
  • manufacturer warranty: 12 Month Warranty
  • notes: Engine Crankcase Vent Valve
  • years: 2009 2007 2006 2010 2008 2011
  • application: Mercedes E350 Crankcase Vent Valve
  • cs-sku: 400

shipping cranshafengin:

  • service: FedEx Ground / FedEx Home Delivery
  • class: Standard
  • cost: $0.00
  • carrier: FedEx
  • type: Fixed
  • transit: 2-6 Days

returns cranshafengin:

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

offer cranshafengin:

  • started: April 15, 2026
  • options: Ship-to-home
  • quantity: 1
  • sold: 0
  • availability: In Stock

general cranshafengin:

  • Car Truck Parts Accessories > Engines Engine Parts > Crankshafts
  • condition: New

seller cranshafengin:

  • city: Lorain, Ohio
  • rating: 98.8%
  • # reviews: 328353

payments cranshafengin:

  • wallet: Paypal
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for makes: mercedes, for years: 2006-2011, part type: valve vent, manufacturer warranty: 12 month warranty, notes: engine crankcase vent valve, years: 2009 2007 2006 2010 2008 2011, application: mercedes e350 crankcase vent valve, cs-sku: 400,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, sku: 19852909638858604,
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1 offer $33.43 USD
  • New. Offer #1 priced at $33.43 + $0.00 shipping estimate = $33.43* total. Components: (3) Expansion Plugs. Notes: Engine Crankcase Vent Valve.FREE SHIPPING

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