FEBI BILSTEIN 46734 Engine Crankcase Breather Hose

( Brand: Febi Bilstein ), ( Manufacturer Part Number: 46734 ), ( Part Type: Engine Breather Hose )

Review FEBI BILSTEIN Engine Crankcase Breather Hose

The **Febi Bilstein 46734 Engine Crankcase Breather Hose** is a high-quality, precision-engineered component designed to maintain optimal airflow and pressure balance within an internal combustion engine s crankcase system. This essential part plays a critical role in ensuring efficient engine performance, longevity, and emissions compliance by regulating the flow of gases and vapors that escape from the combustion chamber through the piston rings and valve seals. Crafted from durable, heat-resistant synthetic rubber with reinforced fabric layers, the 46734 breather hose is engineered to withstand the harsh conditions of high-temperature environments, chemical exposure from engine oils and fuels, and the constant flexing associated with engine operation. Its robust construction prevents premature degradation, cracking, or leakage, which can lead to dangerous carbon buildup in the intake system, reduced engine efficiency, or even catastrophic engine damage over time. The hose features a secure, interference-fit design with precise internal and external dimensions, ensuring a tight seal when installed on compatible crankcase ventilation systems, whether in modern turbocharged or naturally aspirated engines. Whether replacing a worn-out original equipment (OEM) part or upgrading an older vehicle s breather system, this Febi Bilstein hose delivers reliable performance, minimizing oil consumption, smoke emissions, and the risk of sludge accumulation in critical engine components. Ideal for a wide range of automotive applications, including high-performance and daily-drive vehicles, this part exemplifies Febi Bilstein s commitment to precision, durability, and compatibility with aftermarket and OEM specifications.

**Pros and Cons of buying a Febi Bilstein 46734 Engine Crankcase Breather Hose**

The **Febi Bilstein 46734** is a replacement crankcase breather hose commonly used in older vehicles, particularly those with carbureted or older fuel-injected engines. Below is a detailed breakdown of its advantages and disadvantages.

### **Pros**

1. **High Quality and Durability**

The Febi Bilstein brand is known for producing high-quality aftermarket parts, often made from reinforced rubber or silicone materials. This ensures better longevity compared to generic or low-grade hoses, reducing the risk of premature failure.

2. **OEM-Level Fitment**

Febi Bilstein parts are designed to meet or exceed original equipment manufacturer (OEM) specifications. The **46734** is specifically engineered to fit certain vehicle models precisely, minimizing installation issues and ensuring proper function.

3. **Reduced Engine Contamination**

A properly functioning crankcase breather hose prevents oil and combustion gases from entering the intake system, which helps maintain engine cleanliness and prevents carbon buildup in the intake manifold and cylinders.

4. **Improved Engine Performance**

By allowing proper airflow from the crankcase to the intake, the breather hose helps regulate pressure, reducing oil leaks and preventing the "blowing" of gaskets or seals over time.

5. **Easy Installation**

Unlike some OEM hoses that may require cutting or modification, the **46734** is typically designed for straightforward replacement, often fitting directly into place without additional tools.

6. **Widely Available and Trusted**

Febi Bilstein is a well-established brand with a strong reputation in the automotive aftermarket. The **46734** is commonly stocked by auto parts retailers, making it easy to purchase.

7. **Cost-Effective for Long-Term Use**

While the upfront cost may be slightly higher than generic alternatives, the durability and reliability often justify the expense, reducing the need for frequent replacements.

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### **Cons**

1. **Higher Upfront Cost**

Compared to generic or no-name breather hoses, the **Febi Bilstein 46734** is more expensive. This may be a deterrent for budget-conscious buyers, though the long-term benefits may outweigh the initial cost.

2. **Potential Overkill for Some Applications**

If the vehicle is relatively new or the original breather hose was already in good condition, replacing it with a premium part may not be necessary. In such cases, a simpler or cheaper alternative could suffice.

3. **Compatibility Concerns**

While the **46734** is designed for specific vehicles, there is always a risk of misidentification. Purchasing the wrong part could lead to installation difficulties or improper function. Always verify compatibility with the vehicle s make, model, and year.

4. **Limited Availability in Some Regions**

Depending on the location, the **46734** may not be as widely stocked as other brands. Buyers may need to order online or visit specialty auto parts stores, which could delay replacement.

5. **Potential for Over-Engineering**

Some drivers may argue that a high-quality breather hose is unnecessary if the engine is well-maintained and the original part was functioning adequately. In such cases, the extra cost may not be justified.

6. **Installation May Require Disassembly**

In some vehicles, accessing the crankcase breather hose may require removing other components (e.g., intake manifold, air filter housing). While not always complex, this could add time and effort to the replacement process.

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### **Conclusion**

The **Febi Bilstein 46734 engine crankcase breather hose** is a reliable and high-quality replacement part that offers significant benefits in terms of durability, fitment, and engine protection. Its premium construction helps prevent oil leaks, reduces intake system contamination, and contributes to long-term engine health. While the cost is higher than generic alternatives, the long-term performance and peace of mind it provides make it a worthwhile investment for most drivers, particularly those with older or high-mileage vehicles.

For vehicles with newer or well-maintained breather systems, the decision to upgrade may be less critical, but the **46734** remains a safe and trusted choice when replacement is necessary.

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### **Recommendation**

- You are replacing a worn or failing breather hose in an older vehicle.

- You prioritize durability and long-term engine protection.

- You want a part that meets or exceeds OEM standards.

- You are comfortable paying a slightly higher price for a premium aftermarket component.

- The vehicle is new or the original hose is still in good condition.

- You are working with a tight budget and can find a similarly rated but cheaper part.

- You are unsure of the exact compatibility and prefer to verify with a mechanic before purchasing.

**Final Verdict:** For most drivers, the **Febi Bilstein 46734** is an excellent choice due to its reliability and performance. Always ensure proper fitment before purchasing, and follow installation guidelines to maximize its effectiveness.

Details:

Manufacturer Warranty. Crankcase Ventilation System.

part #: 46734 prices

• $30.99-$52.54

specifications emissyste:

• brand: Febi Bilstein
• mpn: 46734
• part type: Engine Breather Hose

shipping emissyste:

• class: Standard
• type: Fixed
• transit: 4-9 Days
• service: Standard
• cost: $16.99

offer emissyste:

• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: March 14, 2026

returns emissyste:

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

seller emissyste:

• # reviews: 805
• rating: 99.7%
• city: Brooklyn, New York

payments emissyste:

• credit card: Diners-club
• wallet: Google-pay
• other

general emissyste:

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

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