BMW 11277802576 Engine Balance Shaft Gear Sprocket 2.0L

( Manufacturer Part Number: 11277802576 ), ( Part Type: Engine Shaft Gear Sprocket ), ( Manufacturer Warranty: 30 Day ), ( Tested: Tested, Cleaned And Inspected ), ( Fitment Type: Direct Replacement )

Review BMW 2.0l Engine Balance Shaft Gear Sprocket 7802576 fits X3 2015–2017

The **BMW 11277802576 engine balance shaft gear sprocket** is a critical, high-performance component designed exclusively for the **2.0L inline-4 turbocharged engine** found in the **2015 2017 BMW X3 (F25) models**, particularly those equipped with the **N26B20 engine variant**. This precision-engineered sprocket plays a vital role in maintaining optimal balance shaft operation, ensuring smooth power delivery, reduced engine vibration, and enhanced longevity of the drivetrain. Crafted from **high-grade steel** and machined to BMW s exacting specifications, this sprocket is engineered to withstand the intense rotational forces generated by the turbocharged engine s high-revving nature, preventing premature wear on the balance shaft system. The **serrated teeth** are designed to mesh seamlessly with the corresponding balance shaft drive gear, minimizing backlash and ensuring consistent torque transfer, which is essential for balancing the reciprocating forces of the engine s pistons and connecting rods. Over time, wear or damage to this sprocket can lead to increased engine noise, rough idle conditions, or even catastrophic failure of the balance shaft assembly, making its replacement a proactive measure for maintaining peak performance and reliability. Whether installed during routine maintenance or as part of a performance upgrade, this **OEM-quality sprocket** ensures that the X3 s turbocharged engine operates with the precision and efficiency BMW demands, preserving the integrity of the drivetrain and delivering the dynamic driving experience expected from this iconic luxury SUV.

### **Pros and Cons of Buying a 2015-2017 BMW X3 (N55 2.0L Engine) with a Worn Balance Shaft Gear Sprocket**

1. **Strong Base Engine (N55 2.0L Twin-Turbo)**

- The N55 is a well-regarded BMW engine known for its reliability when maintained properly. It produces **258 hp and 273 lb-ft of torque**, offering strong performance for an SUV.

- BMW s **Valvetronic variable intake system** and **double vane turbochargers** provide smooth power delivery, especially in turbocharged applications.

- The engine has a **direct injection system**, which improves efficiency and power output compared to port injection.

2. **Good Handling and Driving Dynamics**

- The X3 (E83/E84) is a rear-wheel-drive (or optional xDrive AWD) SUV with **sharp steering, responsive suspension tuning**, and a **low center of gravity** compared to larger SUVs.

- The **6-speed ZF automatic transmission** (or optional 8-speed in later models) is smooth and reliable when properly maintained.

3. **Comfortable and Practical Interior**

- The cabin is **spacious for three passengers**, with a **well-designed layout**, **quality materials** (especially in higher trims), and **good sound insulation**.

- Features like **heated/ventilated seats, panoramic sunroof, and available iDrive infotainment** make it a pleasant daily driver.

- **Rear legroom and cargo space** (up to **16.8 cu. ft.**) are adequate for most needs.

4. **Resale Value and Brand Prestige**

- BMW retains **strong resale value** compared to many competitors, especially in well-maintained examples.

- The **X3 s premium brand image** carries weight, making it a desirable vehicle for buyers who value luxury and performance.

5. **Potential for Modifications**

- The N55 is a **popular platform for tuning**, with aftermarket support for **turbo upgrades, exhaust systems, and performance chips**.

- A fresh **balance shaft gear sprocket** (or related components) can be part of a **restoration project**, potentially increasing long-term reliability.

---

1. **Balance Shaft Gear Sprocket Failure (Major Concern)**

- The **balance shaft gear sprocket** (part of the **N55 s balance shaft system**) is known to **wear out prematurely**, often around **80,000 120,000 miles**.

- When it fails, it can **strip the sprocket teeth**, leading to **rough idle, misfires, engine stalling, or even catastrophic engine damage** if not addressed quickly.

- **Replacement cost** is **high (typically $1,500 $2,500 )** due to labor and parts, and it often requires **removing the engine from the vehicle** for proper installation.

- **Rough idle or hesitation**

- **Check Engine Light (P0016, P0017, P0021, P0022, etc.)**

- **Engine misfires or stalling**

- **Unusual noise from the timing chain area**

2. **High Maintenance and Repair Costs**

- BMWs are **expensive to maintain**, with **premium parts, labor rates, and specialized diagnostics**.

- **Timing chain tensioner, water pump, and oil pump failures** are common on the N55, often requiring **engine disassembly** for repair.

- **Turbocharger failures** (especially on high-mileage examples) can be costly, with **replacement parts running $1,000 $2,000 per turbo**.

3. **Electrical and Infotainment Issues**

- The **iDrive system** (especially in older models) can be **glitchy, slow, or unresponsive**, requiring **software updates or professional recalibration**.

- **Sensor failures (parking sensors, blind-spot monitors, etc.)** are common and often require **expensive replacements**.

- **Battery and charging system problems** (due to **high electrical demand**) can lead to **starting issues or electrical gremlins**.

4. **Suspension and Wear Item Concerns**

- **Shocks, struts, and bushings** wear out around **60,000 100,000 miles**, leading to **rough rides and handling degradation**.

- **Brakes (especially rear discs)** can be **soft or noisy** on high-mileage examples.

- **CV joints and driveshafts** may need replacement if the vehicle has been driven aggressively.

5. **Fuel Economy and Turbo Lag**

- While the N55 is **efficient for a turbocharged engine ( 20 25 MPG combined)**, it **lacks the fuel economy of naturally aspirated or diesel alternatives**.

- **Turbo lag** is noticeable at low RPM, though it improves with **aftermarket tuning or upgrades**.

6. **Reliability Compared to Competitors**

- While the N55 is **more reliable than older BMW engines (N54)**, it is **not as bulletproof as some competitors** like the **Volkswagen 2.0T (EA888), Audi 2.0T (EA888), or even the later N55B30 (2017 with updates)**.

- **Oil consumption** is a known issue on the N55, with some engines burning **0.5 1 quart per 1,000 miles** if not maintained properly.

---

### **Ending Conclusion**

Buying a **2015 2017 BMW X3 with a worn balance shaft gear sprocket** is a **high-risk, high-reward purchase**. The **pros** strong engine potential, great driving dynamics, and a premium interior make it an attractive vehicle for enthusiasts who are **willing to invest time and money in repairs**. However, the **balance shaft sprocket failure is a major red flag**, as it can lead to **expensive, time-consuming repairs** if not addressed immediately.

If you **find a well-documented example with a recently replaced sprocket and full service history**, it could be a **great project car** for someone with **mechanical skills and budget for repairs**. However, if you are **not prepared for potential engine work**, a **later-model N55 (2017 with updates) or a different BMW (like the F30 3 Series) might be a safer choice**.

For **casual buyers or those seeking reliability**, a **used X3 with a known good balance shaft system** (or one that has already been replaced) is **worth considering only if the price reflects the risk**. Alternatively, **exploring a BMW with a different engine (B58 V8, B48 inline-4, or even a diesel)** could provide **better long-term reliability**.

- **Buy the X3 with a balance shaft sprocket replacement already done**, backed by **service records**.

- **Budget for potential timing chain, water pump, and turbo issues** in the next 50,000 100,000 miles.

- **Consider a tune and turbo upgrade** to improve reliability and performance.

- **Look for a 2017 X3 (N55 with updates) or a later-model BMW (F25 X3 with B58 V8).**

- **Avoid high-mileage N55s without proof of balance shaft maintenance.**

- **Consider alternatives like a well-maintained Audi Q5, Volkswagen Tiguan, or Lexus RX** for better long-term reliability.

**Final Verdict:** The **2015 2017 X3 with a balance shaft issue is a gamble** only proceed if you are **prepared for the risks and costs**. Otherwise, **prioritize a vehicle with a proven balance shaft system or a different platform**.

Details:

Part Fitment and Compatibility. Remember LEFT means the Drivers side of vehicle and RIGHT Passengers in our listings.

part #: 11277802576 prices

• $106.35-$655.03

specifications cranshafengin:

• for models: X3
• for makes: Bmw
• for years: 2015-2017
• mpn: 11277802576
• part type: Engine Shaft Gear Sprocket
• manufacturer warranty: 30 Day
• tested: Tested, Cleaned And Inspected
• fitment type: Direct Replacement

shipping cranshafengin:

• type: Fixed
• class: Economy, Standard, Expedited, One-day
• service: Economy, USPS Ground Advantage, FedEx 2Day One Rate Medium Box, FedEx Standard Overnight
• transit: 2-5 Days
• cost: $0.00
• carrier: USPS, FedEx

offer cranshafengin:

• sold: 0
• started: February 19, 2026
• quantity: 1
• availability: In Stock
• options: Ship-to-home

payments cranshafengin:

• credit card: Visa
• other
• wallet: Paypal

general cranshafengin:

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

seller cranshafengin:

• rating: 99.7%
• # reviews: 90667
• city: Waverly, Minnesota

returns cranshafengin:

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

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