fits model: A4, A6. make: Audi.

( Manufacturer Part Number: 06C103373F ), ( Type: Cylinder Head ), ( Oe/oem Part Number: 06c 103 373 F ), ( Material: Aluminum ), ( Vintage Part: Yes )
The **Audi 06C103373F cylinder head** for the **Audi A4 (B6) and A6 (C5) models**, specifically designed for the **3.0L V6 (AVK) engines** with **ASN (Active Suspension with Noise Reduction)** and **BGM (Brake Master Cylinder) integration**, represents a critical high-performance component essential for optimal engine function and reliability. This precision-engineered part is crafted to meet Audi s stringent quality standards, ensuring seamless compatibility with the **3.0L V6 AVK** a robust inline-six powerplant known for its balanced power delivery and refined performance. The cylinder head is meticulously machined from high-grade aluminum alloy, featuring a **right-hand orientation** (as indicated by the part number), which aligns with the engine s firing order and torque distribution for maximum efficiency. Its design incorporates **four intake and four exhaust valves per cylinder**, controlled by a dual overhead camshaft (DOHC) system, allowing for precise valve timing and enhanced airflow dynamics. The head is equipped with **hydraulic valve lifters**, eliminating the need for manual adjustment and ensuring smooth operation while minimizing wear over time. Additionally, it integrates **Audi s ASN (Active Suspension Noise Reduction) technology**, which helps dampen engine vibrations and noise, contributing to a quieter, more refined cabin experience a hallmark of Audi s commitment to driving comfort. For models featuring the **BGM (Brake Master Cylinder) system**, this cylinder head is engineered to interface seamlessly with the brake hydraulic circuit, ensuring synchronized operation between the engine s performance and the vehicle s braking system. Whether used in a **restoration project, performance upgrade, or routine maintenance**, this cylinder head is a vital replacement part that upholds the original Audi engineering ethos, delivering durability, efficiency, and the signature precision expected from a premium German manufacturer. Its compatibility with both the **A4 B6** and **A6 C5** platforms underscores its versatility, making it an indispensable choice for enthusiasts and professionals alike seeking to maintain or enhance the performance of these iconic Audi models.
### **Pros and Cons of Buying a Used Audi A4/A6 (06C103373F) with a 3.0L V6 (AVK/BGN) and a Right Cylinder Head (ASN)**
#### **Overview of the Vehicle**
The **Audi A4/A6 (06C103373F)** with a **3.0L V6 (AVK/BGN)** and a **right-hand cylinder head (ASN)** is part of the **C5 platform**, produced between **2001 and 2004**. This engine was known for its **power, torque, and reliability** when properly maintained, but it also has some **common issues** that must be considered before purchasing.
---
### **Pros**
1. **Strong Engine Performance**
- The **3.0L V6 (AVK/BGN)** produces **around 204 220 HP** and **229 lb-ft of torque**, making it a **capable and smooth** engine for its time.
- The **AVK (fuel-injected) and BGN (direct injection, later models)** versions are both well-regarded, though the **BGN is slightly more complex** due to direct fuel injection.
- The **right-hand cylinder head (ASN)** is a **common variant** and not inherently problematic it simply means the **camshaft timing belt drives the right side** of the engine.
2. **Quattro All-Wheel Drive (Common in A6 Models)**
- Many **A6 models** came with **Quattro**, which improves traction and handling, especially in adverse conditions.
- If the vehicle has **Quattro**, it adds **value and practicality** for all-weather driving.
3. **Good Suspension & Handling**
- The **C5 platform** had a **well-tuned suspension**, providing a **comfortable yet responsive** ride.
- The **A4 (sedan/wagon) and A6 (sedan/wagon)** both offer a **balanced driving experience** compared to some of Audi s later, more aggressive setups.
4. **Classic Audi Styling & Brand Prestige**
- The **C5 Audi** has a **timeless, elegant design** that still holds up well.
- Owning an **Audi from this era** carries **brand prestige**, especially if well-maintained.
5. **Potential for Modifications & Tuning**
- The **3.0L V6 is a popular platform for tuning**, with aftermarket support for **intake, exhaust, and ECU remapping** to increase power.
- **Turbocharging (e.g., Garrett T25/T28)** is a common modification, allowing for **300 HP** with proper tuning.
6. **Used Market Availability & Affordability**
- These cars are **relatively common** in the used market, making them **easier to find** than rare variants.
- Prices are **more reasonable** compared to newer Audis, especially if the vehicle has **low mileage and good maintenance records**.
7. **Reliability with Proper Maintenance**
- When **well-maintained**, the **3.0L V6 can last 200,000 miles**.
- **Common issues (discussed below) can be prevented or fixed** with **regular servicing**.
---
### **Cons**
1. **Timing Belt & Water Pump Failure Risks**
- **Critical failure point:** The **timing belt must be replaced every 60,000 75,000 miles** (or **5 7 years**, whichever comes first).
- **Failure can cause catastrophic engine damage** (bent valves, piston damage).
- **Water pump replacement is often bundled with the belt job** check if it was done recently.
- **BGN engines (direct injection) are slightly more prone to timing belt issues** due to higher stress on the belt system.
2. **Head Gasket & Cooling System Problems**
- **Head gasket failures** are a **known issue**, especially if the engine was **overheated or not maintained**.
- **Symptoms:** White smoke from exhaust, coolant in oil, overheating, sweet-smelling exhaust.
- **Right-hand cylinder head (ASN) is not inherently worse**, but **poor maintenance history increases risk**.
- **Thermostat and cooling system leaks** are also common **check for rust, cracks, or leaks** in the radiator, hoses, and water pump.
3. **Oil Consumption & Valve Stem Seals**
- The **3.0L V6 is known for burning oil**, especially in **higher-mileage examples**.
- **Valve stem seals** can leak, causing **blue smoke from the exhaust**.
- **Regular oil changes (synthetic, high-quality) and checking for leaks** are **essential**.
4. **Transmission Issues (Especially in A6 Models)**
- **Automatic transmissions (if equipped)** can develop **slipping, rough shifting, or solenoid failures** over time.
- **Manual transmissions** are generally more reliable but may require **synchronizer wear** in high mileage.
- **Check transmission fluid condition** burnt or low fluid is a **major red flag**.
5. **Electrical & Sensor Problems**
- **Oxygen sensors, mass airflow sensors (MAF), and throttle body issues** are common in these cars.
- **Check for check engine lights (OBD-II codes)** some issues (like **faulty MAF sensors**) can be **easily fixed**.
- **Power window regulators and door locks** can fail over time **test all electrical functions**.
6. **Suspension Wear & Rust**
- **Shock absorbers and struts** wear out around **80,000 100,000 miles**.
- **Rust is a concern**, especially in **salted climates** check **wheel wells, subframe, and undercarriage**.
- **Ball joints, tie rods, and bushings** may need replacement in high-mileage examples.
7. **Cost of Repairs**
- **Audi parts and labor can be expensive**, especially for **specialty components** (e.g., **timing belt kit, head gasket, Quattro components**).
- **DIY repairs are possible** for some issues (e.g., **brake work, suspension**), but **engine and transmission work is best left to professionals**.
8. **Fuel Economy & Modern Standards**
- **MPG is decent ( 18 22 city, 24 28 highway)** but **not as efficient as modern turbocharged engines**.
- **Emissions compliance** may be an issue if modifying the engine (e.g., **turbocharging without proper tuning**).
---
### **Key Pre-Purchase Inspection Checklist**
Before buying, **inspect or have a mechanic check:****Timing Belt & Water Pump** Must be **recently replaced** (within the last **50,000 miles**).
**Head Gasket Integrity** Check for **coolant in oil, oil in coolant, or white smoke**.
**Oil Consumption** **Burning oil?** Check **dipstick and exhaust smoke**.
**Transmission Condition** **Smooth shifts?** Check **fluid color and level**.
**Cooling System** **No leaks, proper thermostat function, radiator condition**.
**Suspension & Steering** **No clunks, proper tire wear, no excessive play in joints**.
**Electrical System** **All lights, windows, locks, and sensors working**.
**Service Records** **Proof of maintenance (oil changes, belt jobs, etc.)**.
**Rust & Underbody** **Check for corrosion, especially in wheel wells and frame**.
**Exhaust & Emissions** **No excessive leaks, proper catalytic converter function**.
---
### **Conclusion & Recommendation**
#### **Who Should Buy This Car?**
**Enthusiasts who appreciate classic Audi styling and performance.**
**Owners who are **willing to invest in maintenance** (timing belt, head gasket, oil changes).**
**Those who enjoy **modifying and tuning** the engine (turbo, intake, ECU).**
**Buyers looking for a **reliable daily driver** with **proper history and care.**
**People in **mild climates** (less risk of rust and cooling system issues).**
#### **Who Should Avoid This Car?**
**Those who want a **low-maintenance, plug-and-play** used car.**
**Buyers who **cannot afford major repairs** (timing belt, head gasket, transmission).**
**People in **salted or humid climates** without **proactive rust prevention.**
**Those who **don t enjoy mechanical work** and want a **modern, trouble-free** vehicle.**
**Buyers who **ignore service history** this car **demands maintenance.**
#### **Final Recommendation**
- **If you find a well-documented example with:**- **Recent timing belt/water pump replacement.**
- **No signs of head gasket