BMW 19730085659 Dohc Sliding Sunroof 3.0L L6 24V N55

( Manufacturer Part Number: 19730085659 ), ( Type: Sunroof ), ( Manufacturer Warranty: 1 Month ), ( Vintage Part: No ), ( Placement On Vehicle: Roof ), ( Country Of Origin: United States )

Review BMW Series 3.0l L6 Dohc 24v N55 Sliding Sunroof Assembly Oem fits 335I E90 2011–2015

The **BMW 11th Generation 335i (E90) with the iconic N55 3.0L inline-six engine** and a **sliding sunroof** represents a refined blend of German engineering precision, sporty performance, and timeless luxury perfect for enthusiasts who seek both driving exhilaration and everyday practicality. Built between **2005 and 2011**, this model stands out as one of the most versatile and well-balanced coupes in BMW s lineup, offering a **naturally aspirated 3.0-liter twin-scroll turbocharged (TST) inline-six** paired with a **24-valve DOHC (Double Overhead Camshaft) valve train**, delivering a **306 horsepower** and **273 lb-ft of torque** enough to propel the E90 from 0-60 mph in just **5.3 seconds** while maintaining a smooth, linear power delivery that rewards both casual drivers and spirited laps. The **N55 engine**, though not as high-revving as its predecessors, excels in low-end torque and efficiency, making it ideal for both city commuting and highway cruising, all while achieving **30 miles per gallon** in the right hands. Its **sliding sunroof** adds a touch of sophistication, allowing natural light to flood the cabin while offering the convenience of an open-air experience without the complexity of a manual or power convertible.

Under the hood, the **E90 335i** combines BMW s signature **Valvetronic variable valve lift system** with **double vane turbochargers**, ensuring optimal airflow and responsiveness across the engine s rev range. The **6-speed ZF automatic transmission** (or the optional **6-speed Getrag manual** in earlier models) provides seamless gear shifts, while the **sport-tuned suspension** available with **M Sport suspension, adaptive dampers, or even the optional M Performance Package** delivers a balanced mix of comfort and agility, making it equally at home on winding backroads or in spirited city driving. The **sliding sunroof**, a hallmark of BMW s interior design, not only enhances the car s aesthetic appeal but also improves ventilation and light penetration, creating a more open and airy cabin environment.

Inside, the **E90 335i** features BMW s **iDrive infotainment system** (depending on the year), which, while not as intuitive as later models, still offers **CD/MP3 playback, Bluetooth connectivity, and climate control** all controlled via the **steering-wheel-mounted controls** for effortless operation. The **leather-wrapped seats** (available in various grades, including **Nappa leather in higher trims**) provide both comfort and sporty support, while the **wood or aluminum trim options** add a touch of luxury. The **sliding sunroof** integrates seamlessly with the cabin s design, offering a smooth, quiet operation that enhances the overall driving experience. Optional upgrades like **Heated/Cooled Seats, Park Distance Control, or the optional **M Sport Package** (which includes **red-calibrated instruments, sport pedals, and a rear spoiler**) further personalize the 335i to suit individual preferences, whether for daily driving or weekend track sessions.

Externally, the **E90 335i** retains BMW s signature **kidney grille, sleek headlamps, and aerodynamic bodywork**, with the **sliding sunroof** adding a distinctive visual element that sets it apart from the sedan and convertible variants. The **335i badge** on the rear flanks, paired with the **dual exhaust tips**, reinforces its performance credentials, while the **optional M Sport Package** introduces **red accents, a rear diffuser, and a larger rear spoiler** for a more aggressive stance. Whether equipped with **18-inch alloy wheels** (standard) or **19-inch M Sport wheels**, the E90 335i exudes confidence and style, making it a standout choice for those who appreciate a **harmonious mix of power, refinement, and BMW s signature driving dynamics**.

For the discerning owner, the **N55 3.0L engine** is not only a reliable powerplant but also a **highly tunable platform**, capable of handling aftermarket upgrades such as **cold air intakes, exhaust systems, and ECU remaps** to further enhance performance. The **sliding sunroof** also makes maintenance and modifications easier, as it allows for better airflow and accessibility to the cabin. Whether used for **daily driving, weekend adventures, or track days**, the **E90 335i** remains a **timeless BMW** that embodies the perfect marriage of **performance, luxury, and practicality** making it a sought-after classic among enthusiasts and collectors alike.

### **Pros and Cons of Buying a BMW E90 335i (N55, 2011 2015, 3.0L L6, Sliding Sunroof)**

#### **Pros**

1. **Strong Engine and Performance**

- The **N55 3.0L inline-6** is a refined twin-turbocharged engine that delivers **300 horsepower and 300 lb-ft of torque**, providing a balanced mix of power and efficiency.

- Better fuel economy than naturally aspirated V8 models (e.g., E90 535i) while maintaining strong acceleration.

- Smooth power delivery with good low-end torque, making it enjoyable for both city and highway driving.

2. **Reliability Improvements Over Earlier N54 Models**

- The **N55** is an evolution of the N54, addressing some of its common issues (e.g., oil consumption, turbo longevity).

- Improved **oil control valves (OCV)** and **valve cover gasket** designs reduce leaks and wear.

- The **direct injection system** is less prone to carbon buildup compared to the N54 s fuel-injected setup.

3. **Transmission Options**

- Available in **6-speed automatic (ZF 6HP21)** or **6-speed manual**, with the automatic being smooth and well-tuned for BMW s driving dynamics.

- The **Getrag manual** (if present) is precise and engaging for enthusiasts.

4. **Comfort and Ride Quality**

- The **E90 platform** offers a **comfortable ride** with well-tuned suspension (adjustable dampers available in higher trims).

- **Sliding sunroof** adds convenience and a more premium feel, though it may have minor seals that need occasional maintenance.

5. **Aftermarket and Modding Support**

- Strong **aftermarket support** for tuning (e.g., **MHD, BMS, or standalone ECU flashing**) to unlock extra power (350 400 hp is achievable with minor mods).

- **Performance parts** (intakes, exhausts, suspension upgrades) are widely available for enthusiasts.

6. **Resale Value and Collectibility**

- The **335i (N55) is a sought-after model**, especially in later years (2013 2015), due to its balance of power and efficiency.

- As BMW moves toward electrification, **internal combustion models like this are becoming more valuable** to enthusiasts.

7. **Tech and Features (Depending on Trim)**

- **iDrive 5 (2011 2013) or iDrive 6 (2014 2015)** with improved navigation and connectivity.

- **Available features** like **blind-spot monitoring, adaptive cruise control, and parking sensors** (depending on trim).

- **Premium interior** with high-quality materials in higher trims (e.g., **M Sport, Luxury, or M Package**).

8. **Driving Dynamics**

- **Precise steering**, **responsive handling**, and **well-tuned chassis** make it enjoyable for both daily driving and track use.

- **Optional M Sport package** enhances rigidity and performance tuning.

---

#### **Cons**

1. **Turbocharger Reliability Concerns**

- While improved over the N54, **turbochargers can still fail** if maintenance is neglected (e.g., **oil changes every 5,000 7,500 miles** are critical).

- **Wastegate seals and bearings** can wear out, leading to **oil leaks or turbo failure** if not serviced properly.

2. **Direct Injection Carbon Buildup**

- The **direct injection system** can lead to **carbon deposits on intake valves**, causing **rough idle, misfires, or reduced power**.

- Requires **periodic intake valve cleaning** (every 60,000 80,000 miles) to prevent long-term issues.

3. **Oil Consumption (If Not Addressed)**

- Some **N55 engines burn oil**, especially if not maintained properly.

- **Low oil levels** can lead to **turbo failure or engine damage** regular oil checks and top-ups are essential.

4. **Electrical Gremlins (Common in BMWs)**

- **iDrive glitches, sensor failures, or fuse issues** can occur, requiring **professional diagnosis**.

- **Window regulators, door locks, and infotainment systems** may need attention over time.

5. **Maintenance Costs**

- **BMWs are expensive to maintain**, especially with **specialty parts, labor, and diagnostic tools**.

- **Turbocharger replacement ( $2,000 $3,500)** and **transmission servicing** add up.

- **Oil changes should use BMW-approved synthetic oil** (e.g., **LL-01 or LL-04**) to avoid voiding warranties.

6. **Rust and Bodywork Issues**

- **E90s from 2011 2015** (especially in snowy/salted regions) can develop **rust in wheel wells, rocker panels, and undercarriage**.

- **Sliding sunroof seals** may leak over time, requiring **replacement ( $500 $1,200)**.

7. **Depreciation (Compared to Modern Alternatives)**

- While the **N55 holds value well**, newer **hybrid or electric BMWs** (e.g., **i4, iX**) may offer better long-term efficiency and tech.

- **Fuel prices and emissions regulations** could impact resale value in the future.

8. **Noise and Vibration (If Not Properly Maintained)**

- **Exhaust manifold leaks** or **turbo whine** can become noticeable if components wear out.

- **Suspension bushings** may wear out, leading to **clunking noises** over time.

---

### **Ending Conclusion**

The **BMW E90 335i (N55, 2011 2015) with a sliding sunroof** is a **well-balanced choice** for buyers who want a **powerful, efficient, and enjoyable BMW** without the complexity of a V8. It offers **strong performance, good reliability (if maintained), and strong aftermarket support**, making it ideal for **enthusiasts who enjoy driving but also want a practical daily driver**.

However, **potential buyers must be prepared for higher maintenance costs, turbocharger attention, and electrical quirks** that come with BMW ownership. If you **stay on top of maintenance (oil changes, carbon cleaning, turbo checks)**, this car can be **reliable and fun for years**.

### **Recommendation**

- **Best for:** Enthusiasts who want a **turbocharged 6-cylinder BMW** with **good power, efficiency, and mod potential**, and are willing to **invest in maintenance**.

- **Avoid if:** You **hate high maintenance costs**, want **plug-and-play reliability**, or prefer **modern tech** (e.g., hybrid/electric options).

- **Service records** (oil changes, turbo inspections, carbon cleaning).

- **No oil leaks** (check under the car, around the turbo).

- **No misfires or rough idle** (carbon buildup test).

- **Test drive for turbo whine, steering feel, and suspension condition**.

- **Get a pre-purchase inspection** from a **BMW specialist** ( $200 $300).

- **Expect $15,000 $25,000** for a **well-maintained example** (2013 2015 models in better condition).

- **Allocate $3,000 $5,000/year** for maintenance (oil changes, tires, brakes, potential turbo work).

**Final Verdict:** If you **love BMWs, enjoy tuning, and don t mind proactive maintenance**, the **E90 335i N55 is an excellent choice**. If you want **lower ownership hassles**, consider a **used Lexus GS 350 or Audi S5** as alternatives.

Details:

Local pick-up is available if prior arrangements are made. Buyer pays for all return shipping costs. DONOR VEHICLE 2011 BMW 3 SERIES RWD SEDAN.

part #: 19730085659 prices

• $195.69-$250.00

specifications sunroofconverti:

• for models: 335i, E90
• for makes: Bmw
• for years: 2011-2015
• mpn: 19730085659
• type: Sunroof
• manufacturer warranty: 1 Month
• vintage part: No
• placement on vehicle: Roof
• country of origin: United States

shipping sunroofconverti:

• cost: $100.00
• transit: 4-10 Days
• class: Standard
• service: Standard
• type: Fixed

seller sunroofconverti:

• rating: 100.0%
• # reviews: 109
• city: Dallas, Texas

offer sunroofconverti:

• options: Ship-to-home
• availability: In Stock
• quantity: 1
• started: June 2, 2026
• sold: 0

payments sunroofconverti:

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

general sunroofconverti:

• Exterior Parts Accessories > Roofs, Tops Sunroofs > Sunroofs Parts
• condition: Used

returns sunroofconverti:

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

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