BMW 7508273-01 Crankshaft Crank Pulley Vibration Damper 4.4L 5078

( Manufacturer Part Number: 7508273-01 ), ( Part Type: Crankshaft Crank ), ( Manufacturer Warranty: 1 Month ), ( Vintage Part: No ), ( Country Of Origin: Germany )

Review BMW Oem 4.4l Crankshaft Crank Pulley Vibration Damper fits 745LI E65 E66 2002–2005

The **BMW 7508273-01 (02-05) 745Li E65/E66 4.4L Crankshaft Crank Pulley Vibration Damper (Part Number 5078)** is a precision-engineered component designed to mitigate harmful vibrations generated by the high-performance 4.4-liter V8 engine found in the iconic BMW 7 Series models from the 2002 to 2005 generations. This critical part serves as the interface between the crankshaft and the engine s accessory drive system, ensuring smooth operation while absorbing torsional vibrations that could otherwise lead to premature wear, drivetrain fatigue, or even catastrophic failure. Crafted from high-grade materials and engineered to exacting specifications, the damper features a robust rubber insert encased in a machined aluminum housing, providing both flexibility and structural integrity to dampen engine oscillations effectively. The pulley s serrated outer rim ensures a secure fit with the timing belt or chain system, while its precise alignment with the crankshaft s harmonic balancer prevents misalignment-related stress on the engine s internal components. This component is particularly vital for maintaining the longevity and reliability of the 4.4L M1 supercharged V8, which is known for its high torque output and demanding operating conditions. Replacing a worn or damaged vibration damper is essential for preserving the engine s performance, preventing excessive noise, and avoiding costly repairs to the timing system or crankshaft itself. Whether for a restoration project, routine maintenance, or addressing noticeable vibration issues, this OEM-quality damper delivers the durability and performance expected from BMW s high-end luxury vehicles.

### **Analysis of Buying a BMW 745Li (E65/E66, 2002-2005, 4.4L) with a Known Issue: Crankshaft Crank Pulley/Vibration Damper (Part Number 5078)**

#### **Overview of the Vehicle**

The BMW 745Li (E65/E66) is a luxury sedan from the early 2000s, powered by a 4.4L V8 engine (N62/N63, depending on the variant). It is known for its performance, comfort, and premium features but also carries several common reliability concerns, particularly with the **crankshaft pulley/vibration damper (part 5078)**. This component is critical for smooth engine operation, as it dampens vibrations and drives the timing belt.

---

### **Pros of Buying This Vehicle**

1. **Strong Engine Performance**

- The 4.4L V8 produces **300-320 hp** (depending on the year and variant), delivering strong acceleration and a sporty driving experience.

- The engine is naturally aspirated, meaning it is less complex than turbocharged alternatives and generally more reliable if well-maintained.

- BMW s V8s from this era are known for their **durability** if they receive proper maintenance (oil changes, timing belt replacements, etc.).

2. **Luxury and Comfort**

- The E65/E66 7 Series is renowned for its **high-quality interior**, including premium materials, ergonomic seating, and advanced infotainment (for its time).

- The ride is smooth and well-damped, making it comfortable for long drives.

- Features like **heated seats, leather upholstery, and advanced climate control** add to the luxury appeal.

3. **Resale Value and Collectibility**

- The 745Li is a **desirable model** among BMW enthusiasts, particularly the **E66 (long-wheelbase) version**, which is highly sought after.

- Well-maintained examples hold their value better than average, especially if they have **low mileage and a clean service history**.

- The **V8 engine** is a selling point for those who appreciate power and driving dynamics.

4. **Aftermarket Support**

- There is a **large aftermarket** for BMW E65/E66 parts, including performance upgrades, suspension tuning, and interior modifications.

- Tuning options (e.g., **MHD, BMS, or custom ECU flashing**) can enhance power and drivability.

- Classic car communities and forums (e.g., **BMW328.net, E65-E66.com**) provide extensive resources for maintenance and troubleshooting.

5. **Potential for Restoration or Project Work**

- If the vehicle is in **poor condition**, it can be a **project car** for those willing to invest time and money in restoration.

- The **E65/E66 platform** is well-documented, making it easier to source parts and perform repairs compared to older BMWs.

---

### **Cons of Buying This Vehicle**

1. **Crankshaft Pulley/Vibration Damper (Part 5078) Issues**

- The **crankshaft pulley/vibration damper** (part 5078) is a **common failure point** in these BMWs, particularly in the **E65 (short-wheelbase) and early E66 models**.

- **Excessive vibration** (especially at idle or low RPM).

- **Rattling or clunking noises** from the front of the engine.

- **Timing belt tensioner failure** (since the pulley drives the tensioner).

- **Potential for catastrophic engine damage** if the pulley fails while driving (though rare, it can strip the timing belt or damage the crankshaft).

- **Replacement cost**: The **crankshaft pulley/vibration damper** typically costs **$300 $600** (parts only), plus **labor ($300 $600)**, depending on the shop.

- **Lifespan**: These components often last **50,000 100,000 miles** but can fail earlier, especially if the vehicle has been neglected.

2. **Timing Belt and Water Pump Reliability**

- The **timing belt** must be replaced **every 60,000 100,000 miles** (BMW s recommendation is **60,000 miles**).

- If the **water pump** is integrated into the timing belt system (common in these models), it must also be replaced at the same time.

- **Failure of the timing belt** on an **interference engine (like the N62/N63)** can cause **severe engine damage**, including bent valves or piston damage.

- **Cost of replacement**: **$800 $1,500** (parts and labor), depending on the shop.

3. **Electrical and Infotainment Issues**

- The **iDrive system** (especially in early E65/E66 models) is known for **freezing, lagging, or complete failure**.

- **Window regulators, door locks, and power seats** can fail over time, requiring **expensive replacements**.

- **Battery and charging system problems** are common due to **aging alternators and voltage regulators**.

4. **Transmission Problems (Especially in E65 Models)**

- The **ZF 5HP19 automatic transmission** (used in E65 models) is prone to **slipping, rough shifting, and solenoid failures**.

- **Fluid leaks** from the transmission can lead to **premature wear**.

- **Repair costs** can range from **$1,500 $3,000** for a rebuild or replacement.

5. **Suspension and Steering Wear**

- **Control arms, bushings, and ball joints** wear out over time, leading to **excessive play and poor handling**.

- **Power steering pump failures** are common, requiring **replacement ( $500 $1,000)**.

- **Shock absorbers and struts** often need replacement every **50,000 80,000 miles**.

6. **Fuel System and Emissions Issues**

- **Carbon buildup in the intake valves** (common in V8 engines) can reduce performance and fuel efficiency.

- **Oxygen sensors and catalytic converters** fail frequently, leading to **check engine lights and emissions violations**.

- **Fuel pump failures** can occur, requiring **replacement ( $500 $800)**.

7. **Maintenance Costs**

- BMWs are **notoriously expensive to maintain**, especially compared to Japanese luxury alternatives (e.g., Lexus, Acura).

- **Oil changes, spark plugs, and minor repairs** add up quickly.

- **Specialized tools and expertise** are often required for repairs, increasing costs.

8. **Rust and Body Issues**

- Early E65/E66 models (especially those from **cold climates**) are prone to **rust in wheel wells, rocker panels, and undercarriage**.

- **Paint and trim wear** can be extensive, requiring **bodywork or repainting** for a showroom-quality finish.

---

### **Key Considerations Before Purchase**

1. **Verify the Condition of the Crankshaft Pulley/Vibration Damper**

- **Inspect for cracks, excessive play, or unusual wear** when the engine is running.

- **Check for rattling noises** if present, the pulley is likely failing.

- **Ask the seller for maintenance records** to confirm if it has been replaced recently.

- **Budget for replacement** ( $600 $1,200) if it is failing or has failed.

2. **Check the Timing Belt and Water Pump**

- **Ensure the timing belt has been replaced within the last 60,000 100,000 miles**.

- **Inspect the water pump** for leaks or damage it should be replaced at the same time as the belt.

- **If the belt is due**, factor in **$800 $1,500** for replacement.

3. **Test Drive and Mechanical Inspection**

- **Listen for unusual noises** (knocking, rattling, whining) that could indicate **transmission, suspension, or engine issues**.

- **Check for smooth shifting** if the transmission slips or hesitates, it may need servicing.

- **Test the electrical systems** (windows, locks, lights, iDrive) to ensure they function properly.

- **Have a trusted mechanic perform a pre-purchase inspection** ( $150 $300) to catch hidden problems.

4. **Transmission Health**

- **Check fluid condition** if it is **burnt, dark, or smells burnt**, the transmission may be failing.

- **Test for smooth upshifts/downshifts** rough shifting or delays are red flags.

- **If the E65 model**, be prepared for **potential transmission issues** that may require **$1,

Details:

About Item: Better to see something once than hear about it a thousand times. This item came From: 2004 BMW 745Li, Sedan 4-Dr. 6-Speed Automatic Transmission AT ; Rear Wheel Drive RWD. Mileage: 133,250 miles.

part #: 750827301 prices

• $49.50-$202.50

specifications cranshafengin:

• for models: 745li, E65, E66
• for makes: Bmw
• for years: 2002-2005
• mpn: 7508273-01
• part type: Crankshaft Crank
• manufacturer warranty: 1 Month
• vintage part: No
• country of origin: Germany

offer cranshafengin:

• quantity: 1
• best offers: True
• sold: 0
• options: Ship-to-home
• started: March 2, 2026
• availability: In Stock

payments cranshafengin:

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

seller cranshafengin:

• city: Euclid, Ohio
• rating: 99.7%
• # reviews: 10733

shipping cranshafengin:

• service: Standard
• class: Standard
• cost: $20.00
• type: Fixed
• transit: 3-7 Days

general cranshafengin:

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

returns cranshafengin:

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

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