BMW 45217ZFBJ Crankcase Vent Valve

( Manufacturer Part Number: 45217ZFBJ ), ( Part Type: Valve Vent ), ( Manufacturer Warranty: 12 Month Warranty ), ( Notes: Engine Crankcase Vent Valve ), ( Important Note: Oem 11617501563 ), ( Years: 2001 1999 2000 1998 1997 ), ( Application: Bmw 740i Crankcase Vent Valve ), ( Cs-sku: 400 )

Review BMW Replacement Crankcase Vent Valve fits 740I 1997–2001

The **45217ZFBJ crankcase ventilation valve** is a precision-engineered component specifically designed for BMW s **E38 740i models** produced between **1997 and 2001**, including the **1998, 1999, and 2000 model years**. This valve plays a critical role in maintaining optimal engine performance and emissions compliance by regulating the flow of crankcase gases, preventing excessive pressure buildup, and ensuring proper ventilation within the engine bay. Crafted from high-quality materials, including durable plastic and reinforced metal components, the **45217ZFBJ** is engineered to withstand the demanding conditions of BMW s high-performance V8 engine, where precise airflow control is essential for longevity and efficiency.

The valve features a **pressure-sensitive diaphragm mechanism**, which dynamically adjusts to varying engine loads, ensuring that crankcase gases are expelled efficiently while minimizing oil consumption and carbon buildup. This design helps prevent the "blow-by" gases composed of unburned fuel, oil vapors, and combustion byproducts from accumulating in the crankcase, which can lead to oil dilution, reduced compression, and potential damage to the PCV (Positive Crankcase Ventilation) system. By maintaining a balanced internal pressure, the **45217ZFBJ** contributes to smoother engine operation, reduced emissions, and an extended service life for critical components like the valve cover gasket and oil filter housing.

For **1999 and 2000 740i models**, this valve is particularly important due to stricter emissions regulations and the increased displacement of the **M73 V8 engine**, which generates higher combustion pressures. The **45217ZFBJ** is a direct replacement for the original equipment (OEM) part, ensuring a perfect fit with the engine bay s existing mounting brackets and hosing connections. Its compact yet robust design allows for easy installation, requiring minimal disassembly of the valve cover or intake manifold. Whether replacing a worn-out or failed OEM valve or upgrading for enhanced reliability, this aftermarket part is built to meet or exceed BMW s engineering standards, providing a seamless integration with the vehicle s performance and emissions systems.

When selecting this component, it s important to verify compatibility with your specific **740i trim level**, as some variations may include slight differences in mounting or internal calibration. The **45217ZFBJ** is a trusted choice among BMW enthusiasts and mechanics alike, offering a cost-effective solution for maintaining peak engine health while adhering to the vehicle s factory specifications. Proper installation and periodic inspection of the PCV system will ensure that this valve continues to function optimally, supporting long-term engine performance and preventing costly repairs associated with neglected crankcase ventilation.

### Pros and Cons of buying a Part: **45217ZFBJ (Crankcase Vent Valve for 1997-2001 BMW 740i, 1998-2000 Models)**

1. **Direct Fitment** This part is specifically designed for your vehicle s model year (1998-2000 740i), ensuring compatibility with the engine bay layout, mounting points, and crankcase ventilation system. Avoiding generic or mismatched parts reduces the risk of installation errors.

2. **Prevents Oil Leaks and Contamination** The crankcase vent valve regulates pressure in the crankcase, preventing oil leaks into the intake system (which can cause oil consumption or fouling of the air filter and intake components). A faulty valve can lead to costly engine damage if oil enters the combustion chamber.

3. **Improves Engine Efficiency** A properly functioning vent valve maintains optimal crankcase pressure, reducing blow-by gases and minimizing oil loss. This contributes to better engine performance and longevity.

4. **Easy Replacement** The valve is typically a straightforward bolt-on component, often requiring minimal tools (e.g., a socket wrench and possibly a torque wrench for sealing). Many owners or mechanics can install it without specialized equipment.

5. **Cost-Effective Solution** Replacing the valve is far cheaper than dealing with the consequences of a failing system (e.g., oil dilution in the fuel system, intake restrictions, or engine wear from unregulated pressure). The price of $199 (if this is the correct part number and pricing context) is likely a fraction of potential repair costs down the line.

6. **OEM Quality (Assuming Authentic)** If this part is genuine BMW or from a reputable aftermarket supplier (e.g., Snap-on, Bosch, or a trusted BMW specialist), it will meet the manufacturer s standards for durability and performance. Counterfeit or low-quality parts may fail prematurely.

7. **Prevents PCV System Failures** The crankcase vent valve is part of the Positive Crankcase Ventilation (PCV) system. A failing valve can trigger check engine lights (e.g., P0171, P0174 for lean conditions if oil enters the intake) or cause rough idling, misfires, or reduced power.

8. **Long-Term Reliability** Modern BMW engines (especially the M70/M73 used in the 740i) are sensitive to crankcase pressure. Replacing a worn valve can extend the life of seals, gaskets, and even the turbocharger (if equipped) by reducing stress on the system.

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1. **Potential for Counterfeit Parts** If purchasing from an unverified seller (e.g., untrusted online marketplaces, eBay without seller reviews, or gray-market suppliers), there s a risk of receiving a fake or low-quality replica. Counterfeit parts may fail quickly or not fit properly, leading to additional costs or damage.

2. **Misidentification of the Correct Part** The **45217ZFBJ** designation might not match your exact vehicle s requirements if there are subtle variations between model years (e.g., 1997 vs. 2000). Double-checking the part number against your vehicle s service manual or a trusted BMW parts database is critical. A wrong part could lead to installation issues or failure.

3. **Labor Costs (If Not DIY)** While the valve itself is simple to replace, some owners may opt to have a mechanic install it, especially if they lack experience with BMWs. Labor costs can add to the total expense, though this is a one-time fee for the job.

4. **Additional Components May Be Needed** In some cases, the vent valve might require accompanying parts (e.g., a new gasket, seals, or hoses) if they are damaged during removal. This could increase the total cost slightly but is often negligible.

5. **Limited Availability of OEM Parts** Genuine BMW parts can be hard to find, especially for older models like the 740i. If the seller is not a BMW-approved dealer or a trusted aftermarket supplier, there s a chance the part may not be authentic or may arrive damaged.

6. **Symptoms May Persist if Underlying Issues Exist** If the crankcase vent valve is failing due to a larger problem (e.g., worn piston rings, valve seals, or a failing turbo), replacing just the valve may provide temporary relief but not a permanent fix. A compression test or oil leak inspection might be warranted if symptoms recur.

7. **Price Sensitivity** At $199, this part may seem expensive compared to generic alternatives (e.g., universal crankcase vent valves). However, generic parts risk poor fitment, shorter lifespan, or compatibility issues, potentially leading to more frequent replacements or engine problems.

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The **45217ZFBJ crankcase vent valve** is a **critical and cost-effective maintenance item** for your 1998-2000 BMW 740i. Its primary benefits preventing oil leaks, improving engine efficiency, and avoiding costly damage far outweigh the minor risks, provided the part is **authentic and correctly specified**. The cons are largely mitigated by purchasing from a **reputable supplier**, verifying the part number, and ensuring it matches your vehicle s exact requirements.

- **Confirm the part number** against your vehicle s service manual or a BMW parts catalog (e.g., BMW E38 740i workshop manual).

- **Buy from a trusted source** (e.g., BMW dealership, Snap-on, Bosch, or a well-reviewed online retailer with return policies).

- **Consider DIY installation** to save labor costs, as the job is straightforward.

- **Inspect the valve and surrounding components** during installation for any signs of wear (e.g., cracked hoses, damaged seals).

If the part is confirmed to be genuine and correctly fitted, replacing the crankcase vent valve is a **proactive and wise investment** in your 740i s long-term health.

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1. The part number is correct for your 1998-2000 740i (double-check with your manual).

2. The seller has positive reviews and offers a return policy.

3. You are prepared to install it yourself or have a mechanic confirm the fitment.

If you re unsure about the part s authenticity or fitment, contact a **BMW specialist** or an **E38 forum** (e.g., BMW 7 Series forums) for confirmation before buying. The potential savings from avoiding engine damage far justify the upfront cost.

Details:

Parts Geek - For 1997 - 2001 BMW 740I Crankcase Vent Valve 45217ZFBJ 1999 2000 1998: Review Fitment Notes to Ensure Proper Fit condition: New Brand: Replacement Notes: Engine Product Remark: OEM # 12 Month Warranty Vehicle.

part #: 45217zfbj price

• $32.06

specifications cranshafengin:

• for makes: Bmw
• for years: 1997-2001
• mpn: 45217zfbj
• part type: Valve Vent
• manufacturer warranty: 12 Month Warranty
• notes: Engine Crankcase Vent Valve
• important note: Oem 11617501563
• years: 2001 1999 2000 1998 1997
• application: Bmw 740i Crankcase Vent Valve
• cs-sku: 400

payments cranshafengin:

• credit card: Visa
• other
• wallet: Google-pay

shipping cranshafengin:

• class: Standard
• cost: $0.00
• carrier: FedEx
• transit: 3-6 Days
• service: FedEx Ground / FedEx Home Delivery
• type: Fixed

offer cranshafengin:

• options: Ship-to-home
• availability: In Stock
• quantity: 1
• started: April 10, 2026
• sold: 0

returns cranshafengin:

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

general cranshafengin:

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

seller cranshafengin:

• rating: 98.7%
• # reviews: 327387
• city: Pittsburgh, Pennsylvania

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