BMW 11158698796 Engine Motor Crankcase Vent Hose Tube Pipe M850I G15 4.4L

( Manufacturer Part Number: 11158698796 ), ( Part Type: Pipe ), ( Vintage Part: No ), ( Country Of Origin: Czech Republic )

Review BMW G15 4.4l Engine Motor Crankcase Vent Hose Tube Pipe Oem fits 2019–2020

The **BMW 11158698796 2019-2020 M850i (G15) 4.4L Twin-Turbo V8 Engine Crankcase Vent Hose/Tube/Pipe** is a precision-engineered component designed to maintain optimal pressure balance within the engine s crankcase ventilation system. This high-performance hose plays a critical role in the M850i s advanced combustion process by channeling blow-by gases resulting from the compression and expansion cycles of the twin-turbocharged 4.4-liter V8 back into the intake manifold, where they are safely recirculated and burned again. Crafted from durable, heat-resistant synthetic rubber reinforced with high-strength textile fibers, this hose is engineered to withstand the extreme temperatures, high-pressure fluctuations, and aggressive chemical exposure inherent to BMW s high-output turbocharged engines. Its seamless, reinforced construction ensures long-term durability, minimizing the risk of cracking, swelling, or premature failure, which could lead to oil leaks, reduced engine efficiency, or even catastrophic internal damage. The hose s precise fitment is tailored to the M850i s specific crankcase ventilation layout, ensuring a secure connection to the oil separator and intake manifold while accommodating the dynamic movement of the engine bay. Whether installed during routine maintenance or as part of a performance upgrade, this OEM-quality replacement part upholds the M850i s legendary reliability, allowing the twin-turbo V8 to operate at peak performance with minimal emissions and maximum efficiency. For enthusiasts and mechanics alike, this component represents a vital link in the engine s breathing system, ensuring that the G15 s formidable power delivery remains both consistent and sustainable over thousands of miles.

### **Pros and Cons of Buying a 2019 2020 BMW M850i (G15) with a 4.4L Twin-Turbo V8 Engine (Part Number: 11158698796 Crankcase Vent Hose/Tube/Pipe)**

#### **Overview**

The **BMW M850i (G15)** is a high-performance luxury sedan featuring a **4.4L Twin-Turbo V8 engine**, delivering **600 horsepower** and **523 lb-ft of torque**. The **crankcase vent hose/tube/pipe (part #11158698796)** is a critical component that helps manage engine oil vapor, preventing pressure buildup and ensuring proper oil circulation. Over time, wear, leaks, or failure in this system can lead to **oil loss, reduced performance, or even engine damage**.

---

### **Pros of buying a Replacement Part (11158698796)**

1. **Prevents Engine Damage**

- A failing crankcase vent system can cause **excessive oil vapor buildup**, leading to **oil sludge, reduced lubrication, or even catastrophic engine failure** in severe cases.

- Replacing the hose/pipe ensures proper oil vapor escape, maintaining optimal engine function.

2. **Improves Engine Efficiency & Performance**

- A clogged or leaking vent system can disrupt **oil flow and pressure**, potentially reducing **horsepower and torque output**.

- A new part restores proper **breathing and oil circulation**, helping maintain peak performance.

3. **Prevents Oil Leaks & Contamination**

- If the vent hose cracks or detaches, **oil mist or vapor can escape**, leading to **oil leaks or contamination in the intake system** (causing "oil fog" in the cabin or engine bay).

- A fresh part eliminates this risk.

4. **OEM Quality & Reliability**

- BMW s **Genuine Parts** (or high-quality aftermarket equivalents) are designed to match the original specifications, ensuring **durability and compatibility**.

- Avoids issues that may arise from **cheap or mismatched aftermarket parts**.

5. **Warranty & Long-Term Cost Savings**

- If purchasing an **OEM part**, it may come with a **limited warranty**, reducing long-term repair costs.

- Preventing a **major engine issue** (e.g., oil starvation, turbo failure) is far cheaper than dealing with those problems later.

6. **Easy Installation & Compatibility**

- The **G15 M850i s crankcase vent system** is relatively straightforward to replace, requiring minimal tools.

- The part is **direct-fit**, meaning no modifications are needed for installation.

7. **Maintains Resale Value**

- Keeping the engine in **top condition** helps preserve the **M850i s premium resale value**, as performance and reliability are key selling points for luxury high-performance cars.

---

### **Cons of buying a Replacement Part**

1. **Cost (Higher Than Expected for Some)**

- **OEM BMW parts** for this component can be **expensive**, often ranging between **$100 $200 **, depending on the source.

- **Aftermarket alternatives** (e.g., ACDelco, Bosch, or reputable brands like **Fel-Pro, Dorman**) may be cheaper but could have **mixed quality reviews**.

- If the car is **not under warranty**, the **labor cost** (if not DIY) adds to the expense.

2. **Potential for Counterfeit or Low-Quality Parts**

- Some aftermarket parts may be **poorly manufactured**, leading to **early failure or leaks**.

- Buying from **unverified sellers** (e.g., eBay without proper authentication) risks receiving **fake or substandard parts**.

3. **DIY Difficulty for Some Owners**

- While the replacement is **not extremely complex**, it requires **some mechanical knowledge** and access to the **engine bay s lower sections**.

- Those unfamiliar with **BMW engine systems** may struggle with **routing the new hose correctly** or **securing clamps properly**.

4. **Recurring Maintenance Risk**

- If the **underlying issue** (e.g., **oil sludge, turbo wear, or intake leaks**) is not addressed, the **crankcase vent hose may fail again sooner** than expected.

- A **full engine service** (oil change, filter replacement, intake inspection) may be needed alongside the hose replacement.

5. **Time-Consuming if Not DIY**

- If taking the car to a **BMW dealership or specialist**, labor costs can be **high (typically $150 $300 )**.

- Some owners may prefer **professional installation** to ensure **proper sealing and routing**.

6. **Possible Misdiagnosis of Symptoms**

- If the **crankcase vent issue is not the root cause** of the problem (e.g., **turbo wastegate leaks, PCV failure, or oil leaks elsewhere**), replacing just the hose may **not fully resolve the issue**.

- A **comprehensive engine diagnostic** (e.g., **scan tool check, compression test, oil analysis**) may be needed to confirm the correct fix.

---

### **Conclusion & Recommendation**

#### **Should You Buy & Replace the Crankcase Vent Hose/Tube (11158698796)?**

The part is **failing or leaking**, causing **oil loss, reduced performance, or "oil fog" in the engine bay**.

You **prioritize engine longevity and preventative maintenance**.

You are **willing to invest in a quality part** (OEM or a **trusted aftermarket brand**).

The car is **not under warranty**, and you want to **avoid future engine-related failures**.

The **symptoms are mild or intermittent**, and the part is **still functional**.

You **cannot afford the cost** (OEM vs. aftermarket trade-off).

The **root cause is unclear**, and other engine issues (e.g., **turbo, PCV, or oil leaks**) need addressing first.

1. **Verify the Issue**

- Check for **oil leaks, excessive oil consumption, or "blowing oil" symptoms**.

- Use a **smoke machine test** (if available) to confirm **oil vapor escape**.

- Run a **compression test** to ensure the engine is not already degraded.

2. **Choose the Right Part**

- **OEM (BMW Genuine Part)** Most reliable, but expensive.

- **High-Quality Aftermarket** (e.g., **Fel-Pro, Dorman, ACDelco**) Good balance of cost and reliability.

- **Avoid no-name brands** unless from a **well-reviewed seller**.

3. **Consider Professional vs. DIY**

- If **comfortable with basic engine work**, DIY is **cost-effective**.

- If **unsure**, a **BMW specialist or dealership** can ensure **proper installation**.

4. **Pair with Other Maintenance**

- If replacing the hose, **consider an oil change, filter replacement, and intake inspection** to **prevent future issues**.

5. **Monitor Post-Installation**

- Watch for **oil leaks, reduced performance, or warning lights** after replacement.

- If symptoms persist, **recheck the installation or investigate further**.

---

### **Final Recommendation**

**Proceed with the replacement** if the **crankcase vent hose is confirmed faulty**, as it is a **critical preventative measure** for the **4.4L Twin-Turbo V8 s longevity**. The **M850i s engine is powerful but sensitive to oil management**, and neglecting this component can lead to **expensive repairs down the line**.

- **OEM part** if budget allows (long-term reliability).

- **Fel-Pro or Dorman** if cost is a concern (still high-quality).

- **DIY installation** if mechanically inclined; otherwise, **trust a BMW specialist**.

- **Cheap, unbranded parts** (risk of early failure).

- **Ignoring other potential issues** (e.g., turbo, PCV, oil leaks).

By addressing this **proactively**, you **protect the engine s performance, efficiency, and lifespan**, ensuring your **M850i remains a reliable and enjoyable high-performance luxury sedan**.

Details:

All parts including engines, transmissions, transfer cases, differentials, batteries come with a 30 day warranty. DONOR VEHICLE: 2020 BMW M850iX G15 COUPE. FREE SHIPPING is available for most items within the 48 states. This is an item that has been previously used.

Please verify that it fits and is compatible with your specific model before purchasing. ENGINE: 4.4L V8 Twin Power Turbo.

part #: 11158698796 prices

• $38.49-$148.00

specifications ocoosys:

• for makes: Bmw
• for years: 2019-2020
• mpn: 11158698796
• part type: Pipe
• vintage part: No
• country of origin: Czech Republic

payments ocoosys:

• wallet: Paypal
• other
• credit card: Diners-club

returns ocoosys:

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

general ocoosys:

• Car Truck Parts Accessories > Engine Cooling Components > Other Engine Cooling Components
• condition: Used

shipping ocoosys:

• transit: 2-6 Days
• type: Fixed
• cost: $0.00
• service: Standard
• class: Standard

offer ocoosys:

• quantity: 1
• sold: 0
• options: Ship-to-home
• availability: In Stock
• best offers: True
• started: February 26, 2026

seller ocoosys:

• # reviews: 76020
• city: Traverse City, Michigan
• rating: 99.9%

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