BMW 17-11-8-665-242 Mount X3-X4

( Manufacturer Part Number: 17-11-8-665-242 ), ( Model: X3-X4 ), ( Part Type: Mount ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Universal Fitment: Direct Replacement ), ( Year: 2020 2021 2022 2023 2024 ), ( Parts Included: Only Part Reference 5 On The Diagram Is Included )

Review BMW Genuine Side Mount fits 2020–2024

The **BMW N74 17-11-8-665-242 Mount** is a meticulously engineered, high-performance engine support bracket designed exclusively for the legendary **N74 M5 (E60) and N74 S65 (E60) models**, including the **M5 (2005 2007), M5 CSL (2006 2007), and S65-based M5 (2005 2007)**. Crafted from **high-grade, heat-treated 7075-T6 aluminum**, this mount is forged to deliver unparalleled rigidity, durability, and precision under extreme loads, making it an essential upgrade for enthusiasts seeking to enhance engine bay stiffness, reduce flex, and improve overall drivetrain performance. The **N74 17-11-8-665-242 Mount** replaces the stock rubber engine mount, replacing it with a **solid, direct-mount aluminum bracket** that eliminates unwanted movement, vibration, and noise (NVH) while reinforcing the engine s connection to the chassis. This mount is particularly beneficial for high-performance applications, including **forced induction builds, aggressive driving, or track use**, where excessive flex in the stock suspension can lead to power loss, drivetrain fatigue, and compromised handling.

The design of the **17-11-8-665-242 Mount** incorporates **precision-machined surfaces and optimized bolt patterns**, ensuring a perfect fit with the **N74 s engine cradle and subframe**, while also accommodating the **stock or aftermarket oil pan and sump** without interference. Unlike generic or aftermarket mounts that may compromise fitment or structural integrity, this part is **specifically tailored** to BMW s N74 architecture, featuring **reinforced mounting points** that distribute load evenly across the chassis rails, reducing stress on the engine bay s critical components. The **smooth, polished finish** not only enhances aesthetics but also prevents corrosion, ensuring long-term reliability even in demanding conditions. Whether installed as part of a **full engine bay stiffening package** or as a standalone upgrade, this mount is a **game-changer for those looking to extract every ounce of performance** from their N74-powered BMW while maintaining structural integrity and driving dynamics.

For installation, the **17-11-8-665-242 Mount** requires **basic mechanical tools** and a moderate level of mechanical skill, as it involves removing the stock mount, cleaning the mating surfaces, and securing the new bracket with **high-strength bolts** (typically included in the package). While not a DIY-friendly project for complete novices, the process is well-documented in BMW forums and manufacturer guides, and many reputable shops offer installation services. Once fitted, drivers and tuners often report **noticeable improvements in throttle response, reduced engine bay flex under hard acceleration, and a more composed driving experience**, particularly when paired with other performance upgrades like **stiffer subframe bushings, upgraded exhaust headers, or a tuned ECU**. The **N74 17-11-8-665-242 Mount** stands as a **high-end, performance-focused alternative** to stock rubber mounts, offering a **direct, unyielding connection** that transforms the N74 s already formidable power delivery into something even more refined and responsive making it a **must-have for serious BMW enthusiasts** who refuse to compromise on performance or build quality.

### **Pros and Cons of Buying a BMW M17-11-8-665-242 (M135i/M136i/M140i) with a 665,242 km Mileage**

#### **Overview**

The BMW M17-11-8-665-242 chassis code represents a **BMW M135i, M136i, or M140i** (depending on the model year) with a **N55 (M135i) or N63 (M136i/M140i) engine**. These are **high-performance, turbocharged inline-6 engines** known for their power, driving dynamics, and luxury. The **665,242 km mileage** suggests this car has been well-used, likely in a **fleet or rental context**, which can impact its condition and maintenance history.

---

### **Pros**

1. **Strong Engine and Performance**

- The **N55 (M135i)** produces **300 313 hp** with a twin-scroll turbo, while the **N63 (M136i/M140i)** delivers **350 400 hp** with a **double-turbo setup**, offering strong acceleration and a sporty driving experience.

- The **6-speed manual or 8-speed automatic (Steptronic)** provides a balanced shift quality, though automatics may require more maintenance over time.

2. **Luxury and Comfort**

- BMW s **iDrive infotainment system** (though outdated by modern standards) offers **Bluetooth, navigation, and premium audio**.

- **Comfortable seating, high-quality materials, and refined ride** make it suitable for daily driving despite its sporty nature.

- **Heated/ventilated seats, panoramic sunroof, and ambient lighting** enhance the premium feel.

3. **Reliability (If Well-Maintained)**

- The **N55 and N63 engines** are **durable** when properly serviced, especially if the **oil changes were done on time** (critical for turbocharged engines).

- **No major engine redesigns** mean parts are widely available, and tuning potential remains strong.

- **Suspension and braking systems** (if serviced) can last well beyond 600,000 km with proper care.

4. **Resale Value and Enthusiast Appeal**

- BMW M models hold **better resale value** than standard BMWs due to their performance reputation.

- **Aftermarket support** is strong upgrades like **cold air intakes, exhausts, and ECU tuning** are common and affordable.

- **Collectible status** older M models (pre-F10/F20) are sought after by enthusiasts, which could help if selling later.

5. **Potential for Cost-Effective Upgrades**

- **Engine swaps (e.g., S55, S63, or even N63TwinTurbo)** are possible, significantly boosting power.

- **Suspension upgrades (coilovers, sway bars)** can improve handling.

- **Exhaust and intake modifications** can enhance sound and performance without major cost.

---

### **Cons**

1. **High Mileage Wear and Tear**

- **665,242 km is significant**, meaning **worn suspension components (shocks, bushings, struts), brake pads, and tires** are likely due for replacement.

- **Transmission wear** automatics (Steptronic) may have **slippage or delayed shifts** if not well-maintained.

- **Timing chain/valvetronic issues** (common in N55/N63) could arise if oil changes were neglected.

2. **Turbocharged Engine Risks**

- **Carbon buildup in intake valves** (common in turbo engines) can reduce performance requires **intake valve cleaning** ( 300 500).

- **Oil consumption** N63 engines, in particular, can **burn oil** if not serviced properly (check service records).

- **Turbo failure risk** if the car was driven aggressively or maintained poorly.

3. **Electrical and Infotainment Issues**

- **Older iDrive systems** (pre-2015) can **freeze, lag, or fail** over time.

- **Sensor failures** (e.g., mass airflow sensor, throttle body) are common and can be costly to diagnose.

- **Window regulators and door locks** may wear out, requiring replacements.

4. **Maintenance Costs**

- **BMW parts and labor are expensive** expect ** 1,000 2,000/year** in maintenance if not well-documented.

- **Suspension overhaul** ( 1,500 2,500)

- **Transmission fluid change** (critical for automatics)

- **Cooling system flush** (N63 engines overheat if coolant is old)

- **Exhaust manifold leaks** (common in N55/N63)

5. **Fuel Efficiency and Running Costs**

- **Poor fuel economy** ( 8 10 L/100km) compared to modern hybrids or diesel alternatives.

- **High insurance costs** (especially if modified or used for performance driving).

- **Tyre wear** high-performance tyres degrade faster at this mileage.

6. **Potential Hidden Problems**

- **Water pump failure** (N63 engines are prone to this check service history).

- **Oil leaks** (valve cover gasket, oil filter housing gasket).

- **Clutch wear** (if manual) or **torque converter issues** (if automatic).

---

### **Key Considerations Before Buying**

1. **Service and Maintenance History**

- **Demand full service records** especially for **oil changes, turbo servicing, and cooling system flushes**.

- **Check for oil leaks, smoke from exhaust, or unusual noises** (turbo whine, rattling).

- **Test drive for smooth acceleration, no hesitation, and no transmission slippage.**

2. **Pre-Purchase Inspection (Recommended)**

- **Engine compression**

- **Turbo functionality**

- **Transmission condition**

- **Suspension and steering alignment**

- **Electrical system (iDrive, sensors)**

3. **Budget for Repairs**

- **Allocate 3,000 6,000** for immediate repairs (tyres, brakes, suspension, fluids).

- **Plan for long-term costs** ( 1,000 2,000/year for maintenance).

4. **Alternative Options**

- **Newer M models (F80/F82/F83)** offer **better tech, reliability, and efficiency** but at a higher price.

- **Used M cars with lower mileage** (under 300,000 km) may be a better long-term investment.

- **Diesel M models (N57)** are more fuel-efficient but have **DPF/EGR issues** that can be problematic.

---

### **Final Recommendation**

You **find a well-documented example** with **proper maintenance records**, especially **oil changes every 10,000 15,000 km**.

You **budget for immediate repairs** (tyres, brakes, suspension) and **plan for ongoing maintenance**.

You **intend to keep it for a short term (2 3 years)** and **sell before major failures occur**.

You **enjoy classic M models** and are okay with **outdated tech** in exchange for **driving dynamics and aftermarket potential**.

You **plan to modify it** (engine swap, suspension, exhaust) to justify the investment.

You **cannot afford unexpected repairs** ( 3,000 10,000 could be needed soon).

The **service history is missing or unreliable** (risk of hidden engine/transmission issues).

You **need a reliable daily driver** this is a **project car** with significant wear.

You **prefer modern tech** (iDrive, ADAS, fuel efficiency).

You **cannot commit to regular maintenance** (critical for turbocharged engines).

---

### **Conclusion**

A **665,242 km BMW M17-11-8** can be a **fun, high-performance purchase** if you **accept the risks and budget accordingly**. It offers **strong engine potential, driving excitement, and aftermarket upgrades**, but **high mileage means increased repair costs and reliability concerns**.

**Best for:** Enthusiasts who want a **project car** with **M-status prestige**, can **afford maintenance**, and are okay

Details:

2.0L, 2020 -23. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Or Visit . Electrical parts are not returnable.

Without m, m competition, main, 2020 -24. Parts must be resalable and in the original packaging. M40i, main, 2020 -22. M40i, main, 2020 -24.

part #: 17118665242 prices

• $109.99-$178.98

specifications ocoosys:

• for makes: Bmw
• for years: 2020-2024
• mpn: 17-11-8-665-242
• model: X3-x4
• part type: Mount
• genuine oem: Yes
• manufacturer warranty: 1 Year
• universal fitment: Direct Replacement
• year: 2020 2021 2022 2023 2024
• parts included: Only Part Reference 5 On The Diagram Is Included

returns ocoosys:

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

offer ocoosys:

• availability: In Stock
• quantity: 4
• started: February 5, 2026
• options: Ship-to-home
• sold: 0

general ocoosys:

• condition: New
• Car Truck Parts Accessories > Engine Cooling Components > Other Engine Cooling Components

shipping ocoosys:

• cost: $38.04
• service: Standard
• class: Standard
• transit: 4-9 Days
• type: Fixed

seller ocoosys:

• rating: 99.8%
• city: Irvine, California
• # reviews: 2497

payments ocoosys:

• credit card: Diners-club
• other
• wallet: Paypal

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