BMW 24008645370 Automatic Transmission 8HP45 N55 M235IX 59K

( Manufacturer Part Number: 24008645370 ), ( Type: Automatic Transmission ), ( Oe/oem Part Number: 24008601210; 24008601215; 24008614188; 24008638263 ), ( Country Of Origin: Germany )

Review BMW Automatic Transmission Oem N55 59k fits F22 F23 AWD 2015–2016

The **BMW 24008645370 Automatic Transmission AWD 8HP45 for F22/F23 (N55/M235i, 2015-2016)** is a high-performance, precision-engineered automatic transmission module designed exclusively for BMW s front- and all-wheel-drive (AWD) models within the F22 (X1) and F23 (X2) series, spanning the 2015 to 2016 model years. This transmission is a critical component of the **N55 inline-six engine** paired with the **M235i performance variant**, delivering a seamless blend of torque delivery, shifting efficiency, and durability. The **8HP45** is a six-speed automatic transmission with a sophisticated hydraulic and electronic control system, featuring a torque converter with a lock-up clutch that optimizes fuel economy and responsiveness. Its robust construction includes a robust planetary gearset, precision-machined shafts, and a reinforced housing designed to withstand the demands of both daily driving and spirited acceleration. The AWD-specific design incorporates an integrated differential lock mechanism, ensuring balanced power distribution between the front and rear axles while maintaining smooth operation under varying load conditions. This transmission is engineered with BMW s **DCT (Dual-Clutch Technology) influences** in mind, though it retains the traditional wet-clutch automatic design, offering a refined balance of shift quality and longevity. Ideal for enthusiasts seeking a reliable, high-performance transmission for their F22 or F23, this unit is a direct replacement for the original equipment, ensuring compatibility with the vehicle s ECU and drivetrain. Whether restoring a classic or upgrading a used model, this transmission delivers the precision and power expected from BMW s engineering legacy.

### **Pros and Cons of Buying a 2015-2016 BMW 2 Series (F22/F23) with N55 Engine, 8HP45 Automatic Transmission, AWD, and M235ix Tuning**

#### **Pros**

1. **Strong Engine and Performance**

- The **N55** is a well-regarded inline-6 engine known for its **durability, torque, and efficiency**. It produces **258 hp (F22) or 261 hp (F23)** and **273 lb-ft of torque**, making it capable of handling daily driving and light spirited driving.

- The **M235ix** tuning (assuming it s a reputable aftermarket kit) can improve power output (typically **300 hp**) while maintaining reliability if installed correctly. This enhances acceleration and driving dynamics without excessive strain on the engine.

- The **8HP45 8-speed automatic transmission** is smoother and more efficient than older BMW automatics, with better shift quality and fuel economy compared to manual alternatives.

2. **All-Wheel Drive (AWD) Capability**

- The **xDrive AWD system** provides better traction in wet or slippery conditions, improving safety and confidence in adverse weather. This is particularly useful if you frequently drive in rain, snow, or off-road light terrain.

- The AWD setup also contributes to a more balanced handling feel, especially in the **F23 (Gran Turismo)** variant, which has a slightly more composed driving experience than the sportier F22.

3. **Modern Features and Comfort**

- Both the **F22 (Coupe/Cabriolet) and F23 (Gran Turismo)** come with **BMW s iDrive infotainment system**, offering Bluetooth, USB, and navigation (if equipped). While the software can be clunky, it is functional for basic needs.

- **Comfortable interior** with high-quality materials (especially in higher trims), **adjustable seats**, and **good sound insulation**, making it pleasant for daily use.

- The **F23 s longer wheelbase** provides a more refined, less sporty ride compared to the F22, which may appeal to those who prioritize comfort over agility.

4. **Fuel Efficiency (Compared to V8 or Turbocharged Alternatives)**

- The N55 is more efficient than BMW s older V8 engines or turbocharged 3-series models, offering **better MPG (around 20-25 city, 28-32 highway)** without sacrificing too much power.

- The **8HP45 transmission** is more efficient than older automatics, contributing to slightly better fuel economy than a manual-equipped car.

5. **Resale Value and Brand Prestige**

- BMWs, even older models, retain a degree of prestige, which can be appealing if you value the brand.

- The **F22/F23 platform** is relatively modern (2014-2019) and has a dedicated following, meaning parts and maintenance are still widely available.

6. **Aftermarket Support and Modding Potential**

- The **N55 engine** is one of the most popular BMW engines for tuning, with a vast array of **performance chips, turbo upgrades, and suspension modifications** available.

- The **M235ix tuning** (if properly installed) can significantly enhance power while keeping the engine reliable, making it a good choice for those who want a **balanced performance boost**.

- The **lightweight construction** of the F22/F23 allows for **suspension upgrades, exhaust systems, and aerodynamic modifications** without excessive weight penalties.

7. **Reliability (If Maintained Properly)**

- The **N55 engine** is known for its **long lifespan** when maintained correctly (regular oil changes, timing belt replacement every **60,000-100,000 miles**, and attention to cooling system health).

- The **8HP45 transmission** is generally reliable, though some owners report **minor jerkiness or delayed shifts** this can often be fixed with a **transmission fluid flush**.

- **AWD systems** are robust, but **differential and transfer case fluids** should be checked periodically.

---

#### **Cons**

1. **Potential Reliability Issues with the N55**

- **Timing Belt and Water Pump Failure**: The **N55 s timing belt and water pump** must be replaced **every 60,000-100,000 miles** (BMW s recommended interval is 60k, but some tuners extend it to 100k with proper maintenance). Neglecting this can lead to **catastrophic engine damage**.

- **Oil Consumption**: Some N55s (especially those with **high mileage or aggressive driving**) develop **oil leaks or excessive consumption**. This requires **frequent oil checks and top-ups**.

- **Coolant Leaks**: The **thermostat housing and water pump** can leak, leading to **overheating** if not addressed promptly. The **coolant expansion tank** is also prone to cracking.

- **Carbon Buildup**: If the car is driven in **stop-and-go traffic**, carbon deposits can form on intake valves, reducing performance. A **carbon cleaning** (every 50k-70k miles) may be necessary.

2. **Transmission Quirks**

- **Delayed or jerky shifts**, often fixed with a **transmission fluid flush**.

- **Slippage or hesitation** under heavy load, which can be a sign of **worn clutches or solenoid issues**.

- **AWD-specific concerns**: The **xDrive system** can sometimes cause **unexpected engagement**, leading to **slightly less predictable handling** in normal driving conditions.

3. **Maintenance Costs**

- BMWs are **notoriously expensive to maintain**, especially with **OEM parts and labor**.

- **Suspension (struts, bushings, control arms)** BMW s suspension wears out faster than many competitors.

- **Brakes (pads, rotors, calipers)** The F22/F23 uses **large, performance-oriented brake systems** that wear out quickly.

- **Electrical gremlins** The **iDrive system, sensors, and infotainment** can be finicky and require **specialized diagnostics**.

- **Tuning-related risks**: If the **M235ix or other mods** are poorly installed, they can **void warranties, cause overheating, or damage the engine** if not done correctly.

4. **Comfort vs. Sportiness Trade-Off**

- The **F23 (Gran Turismo)** is more comfortable but **less engaging** to drive than the **F22 (Coupe/Cabriolet)**.

- The **AWD setup** can make the car feel **less nimble** in tight corners compared to a **rear-wheel-drive (RWD) BMW**.

- The **soft suspension tuning** (especially in higher trims) can make the ride feel **too plush** for enthusiasts who prefer a firmer, more responsive setup.

5. **Depreciation and Market Value**

- While BMWs hold value reasonably well, **luxury cars depreciate faster than mass-market alternatives**.

- The **F22/F23 platform** is not as sought-after as newer BMWs (e.g., **G20 2 Series, F45 M240i**), meaning **resale value may not be as strong** as a more modern or high-demand BMW.

- **Tuned or heavily modified examples** (especially with **AWD**) may **depreciate faster** due to niche appeal.

6. **Potential Electrical and Infotainment Issues**

- The **iDrive system** can be **slow, glitchy, or unresponsive**, especially in older models.

- **Bluetooth connectivity issues**, **screen freezes**, and **sensor malfunctions** (e.g., **parking sensors, rain sensors**) are common complaints.

- **Adaptive cruise control and lane-keeping assist** (if equipped) may not work reliably.

7. **Tuning Risks (If Not Done Properly)**

- The **M235ix tuning** (or any aftermarket tuning) can **void warranties** and may **increase stress on the engine** if not paired with **proper cooling and oil upgrades**.

- **Forced induction (turbo upgrades)** can lead to **overheating, oil dilution, or catastrophic failure** if not managed correctly.

- **Exhaust and intake modifications** may **void emissions compliance**, leading to **higher inspection costs** in some regions.

8. **Limited Practicality for Some Drivers**

- The **F22 (Coupe/Cabriolet)** has **less cargo space** than a sedan, making it **less practical for families or heavy hauling**.

- The **convertible top (F22 Cabriolet)** can be **expensive to repair** if damaged and may **depreciate faster** than a hardtop.

- The **AWD system adds weight**, which can **reduce fuel efficiency slightly** compared to an

Details:

Any other shipping locations, the customer must inquiry about cost. EXTERIOR BODY COLOR: White. DONOR VEHICLE: 2016 BMW M235Xi N55 F22 AWD Sprat dative Suspension.WITH 59K MILES, Variable Sports Steering.

part #: 24008645370 prices

• $166.00-$1349.99

specifications autotransmissionsgo:

• for models: F22, F23, Awd
• for makes: Bmw
• for years: 2015-2016
• mpn: 24008645370
• type: Automatic Transmission
• oe/oem part number: 24008601210; 24008601215; 24008614188; 24008638263
• country of origin: Germany

returns autotransmissionsgo:

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

offer autotransmissionsgo:

• sold: 0
• quantity: 1
• started: April 14, 2026
• availability: In Stock
• options: Ship-to-home

payments autotransmissionsgo:

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

general autotransmissionsgo:

• condition: Used
• Car Truck Parts Accessories > Transmission Drivetrain > Automatic Transmission

seller autotransmissionsgo:

• city: Garland, Texas
• # reviews: 11884
• rating: 100.0%

shipping autotransmissionsgo:

• type: Fixed
• service: Flat Rate Freight
• cost: $300.00
• class: Freight

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