MTC 122417 Crankcase Breather Hose

( Brand: Mtc ), ( Manufacturer Part Number: 122417 ), ( Part Type: Breather Hose ), ( Features: 100 Accuracy Of Fit ), ( Caution: Fitment Is For North America Vehicles ), ( Country Of Origin: Primary ), ( Material: Factory Specifications ), ( Universal Fitment: Direct Replacement ), ( Modified Item: No ), ( Oe/oem Part Number: 515-235-7-16-11 )

Review MTC Crankcase Breather Hose Bmw fits 745LI 745I 2002–2005

The **MTC 122417 Crankcase Breather Hose** is a high-quality, precision-engineered replacement part designed specifically for the **2002 2005 BMW 745Li and 745i** models, ensuring optimal engine performance and longevity. Engineered to meet or exceed OEM standards, this breather hose is crafted from durable, flexible **silicone or high-grade rubber**, resistant to oil, heat, and environmental degradation, which helps prevent leaks, clogs, and premature wear. The hose features a **tight, secure fit** with reinforced clamps or barbed ends, ensuring a reliable connection to the crankcase ventilation system, thereby maintaining proper pressure balance within the engine bay. This critical component plays a vital role in reducing emissions, preventing oil contamination, and minimizing the risk of harmful carbon buildup in the intake system, which can lead to engine inefficiency or damage over time. Ideal for both professional mechanics and DIY enthusiasts, the MTC 122417 is a direct-fit solution that restores factory performance, reduces noise from excessive crankcase pressure, and extends the lifespan of your BMW s engine components. Built to withstand the demanding conditions of high-performance driving, this breather hose is a must-have upgrade for owners seeking reliability, efficiency, and peace of mind.

**Pros and Cons of buying a MTC 122417 Crankcase Breather Hose for a 2002-2005 BMW 745Li/745i**

The MTC 122417 crankcase breather hose is a direct-fit replacement designed specifically for your BMW 745Li/745i (2002-2005). Here are the key advantages:

1. **OEM Compatibility** This part is engineered to match the original equipment manufacturer (OEM) specifications, ensuring a proper fit and function. It uses materials and design consistent with BMW s standards, reducing the risk of leaks or improper sealing.

2. **Reliability and Durability** MTC (Motorcraft Technical Components) is a trusted brand known for producing high-quality aftermarket parts. The hose is built to withstand the engine s operating conditions, including heat, vibration, and oil vapors, which helps prevent premature failure.

3. **Easy Installation** The part is designed for straightforward installation, often requiring minimal tools and time. Since it s a direct-fit replacement, there s no need for modification or additional adapters, making it ideal for DIYers or mechanics who prefer simplicity.

4. **Prevents Engine Contamination** A faulty crankcase breather hose can allow oil vapors and contaminants to enter the intake system, leading to carbon buildup on intake valves, reduced engine efficiency, or even long-term damage. Replacing it with a reliable hose helps maintain clean airflow and engine health.

5. **Cost-Effective Maintenance** Compared to more expensive OEM or BMW-approved parts, this aftermarket option provides a budget-friendly solution without sacrificing performance or longevity. It s a small but critical component that can extend the life of your engine if properly maintained.

6. **Reduces Emissions and Noise** A properly functioning breather hose helps regulate pressure within the crankcase, reducing oil leaks and minimizing the risk of oil foaming. This can also contribute to quieter engine operation and lower emissions, though the impact may be subtle.

7. **Warranty and Support** MTC parts often come with warranties or guarantees, providing peace of mind in case of defects. The brand s reputation for customer service can also make troubleshooting or returns easier if issues arise.

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1. **Aftermarket vs. OEM Quality** Although MTC is a reputable brand, some BMW enthusiasts argue that OEM parts (original equipment) may offer slightly better longevity or a more precise fit, especially in high-mileage or performance applications. However, for most owners, the difference is negligible.

2. **Potential for Counterfeit Parts** Purchasing from untrusted sellers (e.g., third-party marketplaces without verification) could result in counterfeit or low-quality knockoffs. Always buy from authorized dealers, BMW-approved suppliers, or well-reviewed online retailers to avoid this risk.

3. **Limited Customization** This is a standard replacement part with no customizable features. If you re modifying your engine (e.g., forced induction, high-performance tuning), you may need additional components or a more robust breather system to handle increased stress.

4. **Installation Challenges** While the hose is designed for easy installation, some users may encounter difficulties if they lack mechanical experience or if the surrounding components (e.g., intake manifold, oil filter housing) are corroded or damaged. In such cases, a professional mechanic might be needed.

5. **Material Degradation Over Time** Like all rubber or silicone hoses, the MTC part can degrade due to age, heat, or exposure to oil and chemicals. While it s durable, it s not designed to last indefinitely and may require replacement every 50,000 100,000 miles, depending on driving conditions.

6. **Compatibility with Modifications** If your 745Li/745i has aftermarket modifications (e.g., turbocharging, supercharging, or exhaust upgrades), the stock breather system may not be sufficient. In such cases, a performance-oriented breather (e.g., from companies like AEM, K&N, or Spal) might be necessary to handle increased crankcase pressure.

7. **Price Sensitivity** While this part is affordable, some buyers may find it slightly more expensive than generic or no-name brands. However, the trade-off in quality and reliability often justifies the cost.

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The MTC 122417 crankcase breather hose is an excellent choice for maintaining or restoring proper engine function in your 2002-2005 BMW 745Li/745i. Its OEM-like compatibility, durability, and ease of installation make it a practical and cost-effective solution for routine maintenance. For most owners, this part will perform reliably without issues, provided it is installed correctly and sourced from a trusted supplier.

However, if your vehicle has been heavily modified or you re operating it under extreme conditions (e.g., high-performance driving, frequent towing, or extreme climates), you may want to consider a higher-end or performance-oriented breather system. Additionally, always inspect the hose during regular maintenance to ensure it remains intact and free of cracks or leaks.

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For the average owner of a 2002-2005 BMW 745Li/745i with no significant modifications, **the MTC 122417 crankcase breather hose is highly recommended**. Here s how to proceed:

1. **Purchase from a Trusted Source** Buy the part from an authorized MTC dealer, a BMW-approved parts supplier, or a well-reviewed online retailer (e.g., RockAuto, Amazon, or local BMW specialty shops). Avoid unknown sellers to prevent receiving counterfeit or subpar products.

2. **Follow Installation Guidelines** Carefully follow the installation instructions provided with the part. Ensure the hose is securely connected to the oil filter housing and intake manifold gasket. Use a mild detergent and water to clean the connection points before reassembly to prevent leaks.

3. **Inspect Regularly** During oil changes or general maintenance, visually inspect the hose for cracks, brittleness, or signs of oil leakage. Replace it if any damage is detected, as a failing breather can lead to more serious engine issues.

4. **Consider Performance Upgrades Later** If you plan to modify your engine (e.g., adding a turbo or supercharger), research performance breather systems that can handle increased crankcase pressure. Brands like AEM or Spal offer robust solutions for tuned engines.

5. **Combine with Other Maintenance** While replacing the breather hose, take the opportunity to inspect and replace other related components (e.g., PCV valve, intake gasket, or oil filter housing gasket) if they show signs of wear. This proactive approach can prevent future problems.

By choosing the MTC 122417 hose and maintaining it properly, you ll help ensure your BMW s engine remains clean, efficient, and reliable for years to come.

Details:

Condition: New. CAUTION: Fitment is for North America vehicles. Manufacturer Part Number: 122417. Timing Parts/Kits-Valve Train.

Crankcase Breather Hose fits 2002 2005 BMW 745Li 02-05 745I: MSRP: $43.19. Radiators And Cooling. Tire Chains And Accessories. Rotating Electrical.

Country of Origin Primary: CN. Ignition and Filters. Material: Factory Specifications. Features: 100% Accuracy of Fit.

part #: 122417 prices

• $38.30-$50.99

specifications emissyste:

• for models: 745li, 745i
• for makes: Bmw
• for years: 2002-2005
• brand: Mtc
• mpn: 122417
• part type: Breather Hose
• features: 100 Accuracy Of Fit
• caution: Fitment Is For North America Vehicles
• country of origin: Primary
• material: Factory Specifications
• universal fitment: Direct Replacement
• modified item: No
• oe/oem part number: 515-235-7-16-11

shipping emissyste:

• class: Economy
• cost: $0.00
• type: Fixed
• service: Economy
• transit: 4-7 Days

returns emissyste:

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

payments emissyste:

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

general emissyste:

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

offer emissyste:

• options: Ship-to-home
• sold: 0
• started: April 17, 2026
• quantity: 5
• availability: In Stock

seller emissyste:

• city: Portland, Oregon
• # reviews: 13825
• rating: 99.9%

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