BMW 640i 2018-present

BMW 640i 2018-present Drivetrain Specifications

Detailed technical specifications for the drivetrain system of the 2018-Present BMW 640I, including engine, transmission, differential, and driveshaft data. Essential for technicians and enthusiasts.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the drivetrain specifications for the 2018-Present BMW 640i, including key features, measurements, and technical details

How to Use

Use the search function to locate specific drivetrain components or specifications by entering keywords such as 'transmission', 'differential', or 'driveshaft'.

Navigate through the drivetrain documentation by selecting the desired section from the table of contents or using the sidebar menu for quick access to subsections.

Key Specifications

Engine Displacement

3.0L

Horsepower

335 hp

Torque

332 lb-ft

Transmission

8-speed automatic

Fuel Efficiency

23 mpg (combined)

Available Specifications

Engine and Transmission

Details about the engine and transmission system, including specifications and performance metrics

Engine Specifications

3.0L TwinPower Turbo inline-6 engine
Output: 335 hp @ 5500-6500 rpm
Torque: 332 lb-ft @ 1380-5000 rpm
Direct fuel injection system
Compression ratio: 11.0:1

Transmission System

8-speed Steptronic Sport automatic transmission
Adaptive transmission control with shift paddles
Gear ratios: 1st - 5.25:1, 8th - 0.67:1
Maximum torque capacity: 369 lb-ft
Integrated launch control system

Note: The transmission features a sport mode for enhanced throttle response and quicker shifts.

Driveshaft and Differential

Technical details about the driveshaft and differential system, including materials and performance characteristics

Driveshaft Specifications

Two-piece carbon fiber driveshaft
Length: 1,450 mm (57.1 in)
Maximum rotational speed: 8,500 rpm
Weight: 12.5 kg (27.6 lbs)
Balanced for reduced vibration

Differential System

Electronic Limited-Slip Differential (eLSD)
Final drive ratio: 2.81:1
Torque distribution: 0-100% between rear wheels
Integrated with Dynamic Stability Control (DSC)
Aluminum housing for reduced weight

Note: The eLSD enhances traction and stability during cornering and acceleration.

Suspension and Axles

Information about the suspension and axle components, including geometry and materials

Front Axle

Double-wishbone front suspension
Track width: 1,580 mm (62.2 in)
Aluminum control arms and knuckles
Anti-roll bar diameter: 28 mm (1.1 in)
Electronically controlled dampers

Rear Axle

Five-link rear suspension
Track width: 1,600 mm (63.0 in)
Aluminum subframe and links
Anti-roll bar diameter: 20 mm (0.8 in)
Integrated air suspension option

Note: The rear axle is designed for optimal weight distribution and handling precision.

Performance and Efficiency

Key performance metrics and efficiency details for the drivetrain system

Acceleration and Top Speed

0-60 mph: 4.8 seconds
Top speed: 155 mph (electronically limited)
Drag coefficient: 0.29 Cd
Power-to-weight ratio: 7.8 lbs/hp
Launch control enabled for optimal acceleration

Fuel Efficiency

City: 20 mpg
Highway: 29 mpg
Combined: 23 mpg
Fuel tank capacity: 18.5 gallons
Start-stop system for improved efficiency

Note: Fuel efficiency figures are based on EPA testing standards.

Search Specifications

Search by specification name, value, or description

Component Specifications

Engine

Type: Inline 6-cylinder

Displacement: 3.0L

Power Output: 335 hp @ 5500-6500 rpm

Torque: 332 lb-ft @ 1380-5000 rpm

Compression Ratio: 11.0:1

Fuel System: Direct Injection

Part Number: B58B30M0

Transmission

Type: 8-speed automatic

Model: ZF 8HP50

Gear Ratios: 1st: 4.714
2nd: 3.143
3rd: 2.106
4th: 1.667
5th: 1.285
6th: 1.000
7th: 0.839
8th: 0.667
Reverse: 3.317

Part Number: 8HP50X

Fluid Capacity: 9.5 liters

Fluid Type: BMW ATF 3

Driveshaft

Material: Carbon fiber reinforced plastic

Length: 1.2 meters

Diameter: 80 mm

Part Number: 26107553810

Torque Capacity: 600 Nm

Differential

Type: Electronic Limited Slip Differential (eLSD)

Ratio: 2.81:1

Part Number: 33107553811

Fluid Capacity: 1.2 liters

Fluid Type: BMW SAF-XJ

Axles

Front Axle: Type: Independent double wishbone
Part Number: 31207553812
Track Width: 1600 mm
Wheel Bearing Type: Tapered roller bearing

Rear Axle: Type: Independent multi-link
Part Number: 33307553813
Track Width: 1620 mm
Wheel Bearing Type: Tapered roller bearing

Transfer Case

Type: All-wheel drive (xDrive)

Part Number: 27207553814

Fluid Capacity: 1.0 liter

Fluid Type: BMW TF0870

Torque Split: 40:60 (front:rear)

Clutch

Type: Dual-mass flywheel

Part Number: 21207553815

Torque Capacity: 450 Nm

Wear Limit: 2 mm

Propeller Shaft

Material: Aluminum

Length: 1.5 meters

Diameter: 90 mm

Part Number: 26107553816

Torque Capacity: 700 Nm

Wheel Hub

Front Hub: Part Number: 31207553817
Bolt Pattern: 5x120 mm
Center Bore: 72.5 mm

Rear Hub: Part Number: 33307553818
Bolt Pattern: 5x120 mm
Center Bore: 72.5 mm

Operational Limits

Max Engine Rpm: 7000 rpm

Max Transmission Temp: 120°C

Max Differential Temp: 90°C

Max Torque Output: 450 Nm

Service Information Service

Detailed service requirements and schedules for the drivetrain system

10000

Check transmission fluid level
Inspect driveshaft for wear
Check differential fluid level
Inspect axle boots for leaks

Replace transmission fluid every 60000 miles

30000

Replace differential fluid
Inspect transfer case fluid
Check wheel hub bearings
Inspect propeller shaft for balance

Replace transfer case fluid every 60000 miles

60000

Replace transmission fluid
Replace transfer case fluid
Inspect clutch wear
Check all drivetrain mounts

Perform a full drivetrain inspection

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of drivetrain does the 2018-Present BMW 640i use?

The 2018-Present BMW 640i features a rear-wheel drive (RWD) system as standard, with an optional xDrive all-wheel drive (AWD) system. The xDrive system dynamically distributes torque between the front and rear axles for improved traction and stability.

What is the transmission specification for the BMW 640i?

The BMW 640i is equipped with an 8-speed Steptronic automatic transmission. This transmission features adaptive shift dynamics, paddle shifters, and a sport mode for enhanced performance and efficiency.

What is the torque output of the BMW 640i's drivetrain?

The BMW 640i's 3.0-liter TwinPower Turbo inline-6 engine produces 330 horsepower and 330 lb-ft of torque. This torque is delivered to the drivetrain, ensuring smooth acceleration and responsive handling.

How does the xDrive system improve performance in the BMW 640i?

The xDrive system in the BMW 640i continuously monitors driving conditions and adjusts torque distribution between the front and rear axles. It can send up to 100% of torque to either axle, improving traction, stability, and performance in various driving conditions.

What is the recommended service interval for the drivetrain components?

BMW recommends inspecting the drivetrain components, including the transmission, differential, and driveshaft, every 30,000 miles or as specified in the vehicle's service schedule. Regular maintenance ensures optimal performance and longevity.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

BMW 640i Drivetrain Technical Overview

Coming Soon

Detailed technical guide covering the drivetrain components, specifications, and maintenance procedures for the 2018-Present BMW 640i.

xDrive System Operation and Maintenance

Coming Soon

Comprehensive resource explaining the operation, benefits, and maintenance requirements of the xDrive all-wheel drive system in BMW vehicles.

8-Speed Steptronic Transmission Service Manual

Coming Soon

Service manual for the 8-speed Steptronic automatic transmission, including diagnostic procedures, fluid specifications, and repair guidelines.

BMW Genuine Parts Catalog

Coming Soon

Official catalog of genuine BMW drivetrain components, ensuring compatibility and optimal performance for your 640i.

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