BMW 1247502A Engine Crankshaft Crank 1.9 4-CYLINDER LM35

( Manufacturer Part Number: 1247502A ), ( Type: Crankshaft )

Review BMW 1.9 4-cylinder Engine Crankshaft Crank Oem fits E36 Z3 M44 318 1996–1998

The **BMW 1247502A crankshaft (LM35)** is a precision-engineered component designed specifically for the **1996 1998 E36 318i and Z3 models** equipped with the **1.9L M44 inline-four engine**. This crankshaft is a critical part of the engine s power delivery system, responsible for converting the linear motion of the pistons into rotational force that drives the vehicle s drivetrain. Crafted from high-grade **chromoly steel (4140 or equivalent)**, the LM35 crankshaft is heat-treated to achieve an optimal balance of strength, durability, and resistance to fatigue, ensuring reliable performance under the demanding conditions of daily driving, spirited acceleration, and high-revving applications. Its **five main journals** and **four counterweights** are meticulously machined to precise tolerances, allowing for smooth operation while minimizing vibration and wear over extended mileage. The **crankpin diameter** and **journal spacing** are engineered to match the original BMW specifications, guaranteeing a seamless fit within the E36 s engine block and connecting rod assembly. Whether used in a **restoration project, performance upgrade, or replacement due to wear**, this crankshaft is a direct-fit solution that maintains the integrity of the M44 s legendary driving dynamics delivering crisp throttle response, responsive power delivery, and the characteristic growl of the 1.9L engine s overhead camshaft setup. For enthusiasts seeking to preserve or enhance the performance of their E36 or Z3, the **1247502A crankshaft** remains an essential, high-quality component that embodies BMW s engineering precision.

### **Pros and Cons of Buying a 1996-1998 BMW E36 318i/Z3 (1.9L M44 Engine, LM35 Crankshaft)**

#### **Pros**

1. **Affordable Entry Point into BMW Ownership**

- The E36 318i and Z3 (1.9L M44) are among the most budget-friendly BMW models from the era, making them accessible for those who want a classic BMW experience without the high cost of a 5-series or M-car.

2. **Lightweight and Agile Handling**

- The 1.9L M44 engine is paired with a relatively light chassis, giving the car nimble on-town driving and better maneuverability than heavier BMWs of the time.

- The Z3 (roadster version) is particularly fun to drive, offering a sporty, open-air experience with sharp steering and precise handling.

3. **Reliable for the Era (When Maintained Properly)**

- The M44 engine is a robust inline-4, known for lasting well beyond 100,000 miles if regularly serviced. Many examples exceed 200,000 miles with basic maintenance.

- The LM35 crankshaft is a common upgrade (replacing the stock LM34) to improve durability, reducing the risk of catastrophic failure.

4. **Classic BMW Driving Dynamics**

- The E36 and Z3 retain the hallmark BMW feel precise steering, engaging suspension, and a well-balanced ride.

- The manual transmission (if available) enhances the driving experience, making it more engaging than modern automatics.

5. **Modding Potential**

- The M44 is a popular platform for tuning, with aftermarket support for upgrades like turbocharging (e.g., M44T), intake/exhaust modifications, and suspension tuning.

- The E36 and Z3 have a strong aftermarket for parts, making repairs and upgrades easier than on older BMWs.

6. **Lower Running Costs (Compared to Modern BMWs)**

- Fuel efficiency is decent ( 20-25 MPG combined), and parts are cheaper than those for newer BMWs.

- Insurance is often more affordable than for high-value modern BMWs.

7. **Nostalgia and Community**

- Owning a classic BMW like this connects you to a passionate community, with clubs, meetups, and forums offering support and advice.

- The E36 and Z3 are iconic models, appealing to enthusiasts who appreciate BMW s design language from the '90s.

---

#### **Cons**

1. **Aging Mechanical Components**

- **Timing Belt & Water Pump:** The M44 requires a timing belt replacement every **60,000 miles** (or 5 years, whichever comes first). Neglecting this can lead to catastrophic engine damage.

- **Valvetronic System (Z3):** The Z3 s variable intake system is prone to failure, often requiring a rebuild or replacement ( $1,000 ).

- **Suspension Wear:** Bushings, shocks, and control arms degrade over time, leading to clunkiness and poor handling if not maintained.

2. **Rust Issues (Especially in Snowy/Coastal Areas)**

- The E36 and Z3 are notorious for rust, particularly in the wheel wells, subframe, and rear axle. A thorough inspection is **mandatory** before purchase.

- The Z3 s roadster body is more prone to rust than the coupe version.

3. **Reliability Concerns with High Mileage**

- **Oil Leaks:** Common from valve cover gaskets, rear main seal, and oil filter housing gasket.

- **Transmission Issues:** The Getrag 213/217 manual transmissions are durable but can develop rough shifting or synchro wear over time.

- **Electrical Gremlins:** BMW s '90s electronics (e.g., fuel injection, sensors) can be finicky, requiring occasional diagnostics.

4. **Limited Power Compared to Modern Standards**

- The 1.9L M44 produces ** 125-133 hp**, which is adequate but feels underpowered by today s standards, especially when towing or driving aggressively.

- The Z3 s top speed ( 115 mph) is modest compared to modern sports cars.

5. **Maintenance Costs Add Up**

- While parts are cheap, labor costs can be high if repairs require specialized BMW mechanics.

- Valvetronic rebuild ( $1,000 )

- Suspension overhaul ( $800-$1,500)

- Transmission rebuild ( $1,500 )

- Electrical system diagnostics (e.g., injectors, sensors)

6. **Safety & Modern Standards**

- **No ABS or stability control** (E36 318i lacks ABS; Z3 has it as an option).

- **Poor crash protection** compared to modern safety ratings.

- **Tires and brakes** are outdated expect to replace them sooner rather than later.

7. **Depreciation & Long-Term Value**

- These cars depreciate quickly, and finding reliable used parts becomes harder as they age.

- If you plan to keep it long-term, budget for eventual major repairs (e.g., engine rebuild, transmission swap).

---

### **Ending Conclusion & Recommendation**

#### **Who Should Buy This Car?**

- **Enthusiasts who prioritize driving fun over modern convenience** and are willing to maintain it properly.

- **Budget-conscious buyers** who want a classic BMW without the expense of a 5-series or M-car.

- **Those who enjoy modding and tinkering** with a project car.

- **Owners who can store it in a dry garage** to prevent rust and protect it from the elements.

#### **Who Should Avoid It?**

- **First-time BMW owners** unfamiliar with classic German maintenance.

- **Those who want a daily driver with minimal hassle** expect regular upkeep.

- **Buyers in harsh climates** (snow, salt, humidity) without rust-proofing.

- **People who need modern safety features** (ABS, stability control, airbags).

#### **Final Recommendation**

If you find a **well-documented, low-mileage (under 100,000 miles) E36 318i or Z3 with a maintained M44 (LM35 crank), no rust, and a clean service history**, it can be a fantastic project or fun daily driver. **Prioritize:**

**Timing belt replacement history** (every 60K miles).

**No major rust** (inspect wheel wells, subframe, rear axle).

**Smooth-running engine** (no knocking, oil leaks, or misfires).

**Transmission in good condition** (no rough shifting).

**Budget for future maintenance** (expect $1,000 $3,000/year for upkeep).

- **Weekend/weekday driver** (if you enjoy classic cars).

- **Project car** (if you re willing to invest time/money in restoration).

- **Track or autocross use** (with proper upgrades).

- You need a **reliable, low-maintenance** daily.

- You re **unprepared for mechanical work**.

- The car has **hidden rust or neglect**.

**Verdict:** A **1996-1998 E36 318i/Z3 with a 1.9L M44 (LM35 crank) can be a rewarding purchase for the right owner**, but it requires **dedication, budgeting, and mechanical savvy**. If you re willing to put in the work, it offers a **unique blend of BMW driving pleasure and classic car ownership** just don t expect it to be hassle-free.

Details:

part #: 1247502a prices

• $50.99-$150.00

specifications cranshafengin:

• for models: E36, Z3, M44, 318
• for makes: Bmw
• for years: 1996-1998
• mpn: 1247502a
• type: Crankshaft

general cranshafengin:

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

offer cranshafengin:

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

shipping cranshafengin:

• service: USPS Priority Mail
• type: Fixed
• carrier: USPS
• cost: $0.00
• transit: 4-9 Days
• class: Expedited

seller cranshafengin:

• # reviews: 734
• rating: 100.0%
• city: Washington, North Carolina

returns cranshafengin:

• policy: No Returns

payments cranshafengin:

• other
• wallet: Apple-pay
• credit card: Mastercard

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