MERCEDES 32WR33S Crankcase Breather Hose

( Manufacturer Part Number: 32WR33S ), ( Part Type: Breather Hose ), ( Fit Years: 1987 1988 1986 1991 1989 1990 ), ( Part Details: Engine Crankcase Breather Hose Idling Air, Distributor Line ), ( Cs-sku: 400 ), ( Country Of Origin: Germany )

Review MERCEDES Genuine Crankcase Breather Hose fits 420SEL 1986–1991

The **32WR33S Crankcase Breather Hose** is a precision-engineered aftermarket replacement part specifically designed to restore optimal engine performance and longevity for the **1986 1991 Mercedes-Benz 420 SEL (W126)** models equipped with the **323.632 (M116) inline-six engine**. This critical component plays a vital role in maintaining proper crankcase ventilation by channeling harmful blow-by gases away from the engine bay, preventing oil dilution, and reducing emissions. Crafted from high-quality **silicone or reinforced rubber**, this hose is built to withstand the extreme temperatures, vibrations, and pressure fluctuations inherent in high-performance applications, ensuring a secure and leak-free connection to the **PCV (Positive Crankcase Ventilation) system**. The **32WR33S** is meticulously fitted with **clamp-compatible ends** to guarantee a snug, vibration-dampening seal at both the **oil separator** and **intake manifold**, minimizing the risk of oil leaks or air leaks that could compromise engine efficiency. Ideal for both restoration projects and routine maintenance, this hose is a direct-fit replacement for the original equipment, eliminating the need for modifications and ensuring compatibility with the vehicle s factory-installed components. By maintaining a clean and pressurized crankcase environment, this breather hose helps prevent sludge buildup, reduces carbon deposits on intake valves, and extends the life of your engine s internal components, making it an essential upgrade for any Mercedes-Benz enthusiast seeking reliability and performance.

### Pros and Cons of Buying a 32WR33S Crankcase Breather Hose for a 1986-1991 Mercedes-Benz 420SEL

1. **Compatibility and Fit:** The 32WR33S crankcase breather hose is specifically designed for the 1986-1991 Mercedes-Benz 420SEL, ensuring a proper fit without modifications. This reduces the risk of leaks or improper installation, which can lead to engine contamination or performance issues.

2. **Prevents Engine Contamination:** A functioning crankcase breather system prevents oil and combustion gases from entering the engine s air intake system. Over time, this buildup can cause sludge, reduced engine efficiency, or even engine damage. A new or properly functioning hose ensures that these contaminants are expelled safely.

3. **Maintains Engine Performance:** By allowing proper ventilation of the crankcase, the breather hose helps maintain optimal engine pressure. This can improve fuel efficiency, reduce oil consumption, and prevent excessive carbon buildup on valves and pistons.

4. **Prevents Oil Leaks:** A failing breather hose can sometimes lead to oil leaks or seepage, particularly if the hose is cracked or deteriorated. Replacing it with a new, high-quality part eliminates this risk.

5. **Ease of Installation:** The hose is relatively straightforward to replace, especially if you have basic mechanical skills or access to a mechanic. Most owners can complete the job in under an hour with the right tools.

6. **Cost-Effective:** Compared to the potential cost of engine repairs or performance degradation caused by a failing breather system, replacing the hose is a minor and inexpensive maintenance task. Prices for a genuine or high-quality aftermarket part are typically under $50, depending on the source.

7. **Extends Engine Lifespan:** Regular maintenance, including replacing worn-out components like the crankcase breather hose, helps prolong the life of your engine. This is particularly important for older vehicles where wear and tear can accelerate over time.

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1. **Potential for Counterfeit Parts:** Some aftermarket or online sellers may offer counterfeit or low-quality replicas of the original equipment (OEM) part. These can fail prematurely, leading to the same issues the original hose was meant to prevent. Always purchase from reputable suppliers or verify the authenticity of the part.

2. **Limited Availability of Genuine Parts:** While the 32WR33S hose is not exceedingly rare, genuine Mercedes-Benz parts may not always be readily available at local auto parts stores. You may need to order it online, which could involve waiting for shipping or dealing with potential delays.

3. **Risk of Incorrect Installation:** If the hose is not installed correctly such as being improperly routed, clamped, or connected it can lead to leaks, reduced effectiveness, or even damage to surrounding components. Careful attention to the installation process is required.

4. **Material Quality Variations:** Even among aftermarket parts, the quality of materials can vary. Some hoses may be made from thinner or less durable materials, which could lead to cracking or failure over time, especially in older vehicles with high mileage.

5. **Additional Maintenance Needs:** While the breather hose itself is a simple part, the entire crankcase ventilation system may require periodic inspection. Other components, such as the PCV (positive crankcase ventilation) valve, may also need attention, adding to the maintenance workload.

6. **Time and Effort:** Replacing the hose requires some mechanical knowledge and access to the engine bay. For those uncomfortable with DIY repairs, this may necessitate visiting a mechanic, incurring additional labor costs.

7. **Environmental Concerns:** The crankcase breather hose expels oil vapors and contaminants into the atmosphere. While this is a standard function of the system, it can contribute to air pollution. Some modern vehicles use more advanced systems to mitigate this, but older models like the 420SEL rely on basic ventilation.

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Replacing the crankcase breather hose on a 1986-1991 Mercedes-Benz 420SEL is a practical and necessary maintenance task. The benefits such as preventing engine contamination, maintaining performance, and avoiding costly repairs far outweigh the minor drawbacks, provided you source a high-quality part and install it correctly. The potential risks, including counterfeit parts or installation errors, can be mitigated by purchasing from trusted suppliers and following the manufacturer s guidelines.

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1. **Source the Part Carefully:** Purchase the 32WR33S crankcase breather hose from a reputable supplier, such as a Mercedes-Benz dealership, an authorized parts distributor, or a well-reviewed online retailer (e.g., RockAuto, Amazon, or eBay with verified sellers). Avoid overly cheap options that may indicate poor quality.

2. **Verify Compatibility:** Double-check that the part number (32WR33S) matches your vehicle s specifications. Some hoses may appear similar but have slight variations in design or material that could affect performance.

3. **Inspect the System:** While replacing the hose, take the opportunity to inspect the PCV valve, oil cap, and surrounding components for wear or damage. Replace any other worn parts to ensure the entire crankcase ventilation system is functioning optimally.

4. **Follow Installation Instructions:** Refer to your vehicle s service manual or a trusted online guide (e.g., Chilton, Haynes, or Mercedes-Benz-specific resources) for step-by-step installation instructions. Pay special attention to routing the hose correctly and ensuring all clamps are securely tightened.

5. **Consider Professional Help if Needed:** If you are unsure about the installation process or lack the necessary tools, consult a mechanic to perform the replacement. This is especially important if you are unfamiliar with working on your specific model.

6. **Monitor for Issues Post-Installation:** After replacing the hose, monitor your vehicle for any unusual noises, oil leaks, or performance changes. If you notice anything out of the ordinary, have the system inspected again.

In summary, replacing the crankcase breather hose is a straightforward and beneficial maintenance task for your 1986-1991 Mercedes-Benz 420SEL. With the right part and careful installation, it will help keep your engine running smoothly and extend its lifespan.

Details:

The Genuine 32WR33S Crankcase Breather Hose is designed to fit 1986 - 1991 Mercedes 420SEL model's. Came off of a 1987 Mercedes Benz 420 SEL that was running and is now being parted out. Made by the trusted brand Genuine, this crankcase breather hose is a reliable and durable component for your Mercedes engine. This high-quality engine part is essential for ensuring proper ventilation and preventing overheating.

part #: 32wr33s prices

• $40.00-$61.67

specifications cranshafengin:

• for models: 420sel
• for makes: Mercedes
• for years: 1986-1991
• mpn: 32wr33s
• part type: Breather Hose
• fit years: 1987 1988 1986 1991 1989 1990
• part details: Engine Crankcase Breather Hose Idling Air, Distributor Line
• cs-sku: 400
• country of origin: Germany

offer cranshafengin:

• sold: 0
• started: March 15, 2026
• quantity: 1
• best offers: True
• availability: In Stock
• options: Ship-to-home

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shipping cranshafengin:

• service: USPS Ground Advantage
• class: Standard
• carrier: USPS
• type: Calculated
• transit: 4-10 Days
• cost: $8.10

seller cranshafengin:

• rating: 100.0%
• city: Gaffney, South Carolina
• # reviews: 1241

returns cranshafengin:

• policy: No Returns

general cranshafengin:

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

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