BMW 640i 2018-present

BMW 640i 2018-present Suspension Specifications

Detailed technical specifications for the 2018-Present BMW 640i suspension system, including front and rear suspension components, alignment settings, and dynamic damping control.

Updated Oct 14, 2023

Overview Specifications

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

How to Use

Use the search function to locate specific suspension specifications by entering keywords such as 'spring rate', 'damping force', or 'ride height'.

Navigate through the suspension documentation sections using the table of contents or by scrolling through the major sections and subsections.

Key Specifications

Front Spring Rate

28 N/mm

Rear Spring Rate

32 N/mm

Front Ride Height

140 mm

Rear Ride Height

135 mm

Dynamic Damper Response Time

20 ms

Available Specifications

Front Suspension

Detailed information about the front suspension system, including components, measurements, and technical specifications

MacPherson Strut Design

Spring rate: 28 N/mm
Damping force (compression): 1200 N
Damping force (rebound): 1800 N
Ride height: 140 mm
Anti-roll bar diameter: 24 mm

Wheel Alignment Specifications

Camber angle: -0.5° to -1.0°
Toe angle: 0.10° to 0.20°
Caster angle: 7.5° to 8.5°
Kingpin inclination: 12.5°

Note: Alignment settings may vary based on driving conditions and tire type.

Rear Suspension

Detailed information about the rear suspension system, including components, measurements, and technical specifications

Multi-Link Independent Suspension

Spring rate: 32 N/mm
Damping force (compression): 1100 N
Damping force (rebound): 1600 N
Ride height: 135 mm
Anti-roll bar diameter: 22 mm

Wheel Alignment Specifications

Camber angle: -1.5° to -2.0°
Toe angle: 0.15° to 0.25°
Caster angle: Not applicable (rear suspension)
Kingpin inclination: Not applicable (rear suspension)

Note: Rear alignment settings are critical for stability and tire wear.

Adaptive Suspension

Details about the adaptive suspension system, including its operation and technical specifications

Dynamic Damper Control

Adjustable damping force range: 800 N to 2000 N
Response time: 20 ms
Modes: Comfort, Sport, Sport+
Integrated with Driving Experience Control

Air Suspension (Optional)

Air spring pressure range: 5 bar to 10 bar
Load leveling adjustment range: ±30 mm
Automatic height adjustment based on speed
Integrated with navigation system for predictive adjustments

Note: Air suspension is available as an optional feature on select models.

Suspension Maintenance

Guidelines and specifications for maintaining the suspension system

Inspection Intervals

Visual inspection every 10,000 miles
Alignment check every 20,000 miles
Shock absorber test every 30,000 miles
Bushing and joint inspection every 40,000 miles

Torque Specifications

Strut mount bolts: 90 Nm
Control arm bolts: 120 Nm
Anti-roll bar links: 50 Nm
Subframe bolts: 140 Nm

Note: Always use a calibrated torque wrench for accurate tightening.

Search Specifications

Search by specification name, value, or description

Component Specifications

Front Suspension

Type: Double wishbone with adaptive air suspension

Spring Rate: 32 N/mm

Shock ABSorber Type: Electronically controlled dampers

Stabilizer Bar Diameter: 28 mm

Bushings Material: Synthetic rubber with polyurethane reinforcement

Part Numbers: Strut Assembly: 31-30-6-857-367
Control Arm: 31-10-6-857-369
Stabilizer Link: 31-35-6-857-371

Rear Suspension

Type: Multi-link with adaptive air suspension

Spring Rate: 28 N/mm

Shock ABSorber Type: Electronically controlled dampers

Stabilizer Bar Diameter: 22 mm

Bushings Material: Synthetic rubber with polyurethane reinforcement

Part Numbers: Trailing Arm: 33-30-6-857-372
Control Arm: 33-10-6-857-374
Stabilizer Link: 33-35-6-857-376

Adaptive Suspension System

System Name: Dynamic Damper Control (DDC)

Adjustment Range: 10 levels of damping force

Response Time: 20 ms

Operating Temperature Range: -40°C to 120°C

Part Numbers: Control Module: 37-10-6-857-380
Sensor Kit: 37-10-6-857-382

Air Suspension System

Air Spring Type: Rolling lobe air springs

Compressor Power: 400 W

Pressure Range: 5 to 15 bar

Part Numbers: Air Spring: 37-20-6-857-384
Compressor: 37-20-6-857-386

Wheel Alignment

Front Camber: -0.5° to -1.5°

Front Toe: 0.10° to 0.20°

Rear Camber: -1.5° to -2.5°

Rear Toe: 0.15° to 0.25°

Caster Angle: 7.5° to 8.5°

Torque Specifications

Front Strut Mount Nuts: 90 Nm

Rear Trailing Arm Bolts: 120 Nm

Stabilizer Link Nuts: 45 Nm

Control Arm Bolts: 100 Nm

Operational Limits

Maximum Load Front: 1200 kg

Maximum Load Rear: 1300 kg

Maximum Speed With Adaptive Suspension: 250 km/h

Minimum Ground Clearance: 120 mm

Maximum Ground Clearance: 160 mm

Diagnostic Specifications

Fault Codes

480A - Air suspension compressor malfunction
480B - Adaptive damper control failure
480C - Height sensor signal error

Diagnostic Tool: BMW ISTA

Test Procedures

Check air suspension pressure
Verify damper response time
Inspect height sensor calibration

Maintenance Specifications

inspection Interval: Every 30,000 miles or 24 months

Lubrication Points

Control arm bushings
Stabilizer bar links
Ball joints

Replacement intervals: Shock ABSorbers: 60,000 miles
Air Springs: 100,000 miles
Bushings: 80,000 miles

Safety information

Warnings

Do not operate vehicle with damaged air suspension
Ensure proper alignment after suspension repairs
Use only BMW-approved replacement parts

Notes

Adaptive suspension requires recalibration after component replacement
Air suspension system must be depressurized before servicing

Service Information Service

Detailed service requirements and schedules for the suspension system

30,000 miles

24 months

Inspect suspension components for wear
Check air suspension pressure
Verify wheel alignment

Replace worn components as necessary

60,000 miles

48 months

Replace shock absorbers
Inspect and lubricate bushings
Check adaptive suspension calibration

Use BMW-approved parts for replacements

100,000 miles

84 months

Replace air springs
Inspect and replace stabilizer links
Verify all torque specifications

Perform full suspension diagnostic check

Frequently Asked Questions

Find answers to common questions about torque specifications

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

The 2018-Present BMW 640i is equipped with a double-wishbone front suspension and a multi-link rear suspension. This setup provides a balance of sporty handling and ride comfort. The front suspension features aluminum control arms and struts, while the rear suspension includes a five-link design with lightweight materials for improved dynamics.

What is the recommended tire pressure for the BMW 640i suspension system?

The recommended tire pressure for the BMW 640i varies based on load and driving conditions. For normal driving, the front tires should be inflated to 32 psi (2.2 bar) and the rear tires to 35 psi (2.4 bar). For high-speed driving or heavy loads, adjust to 36 psi (2.5 bar) front and 39 psi (2.7 bar) rear. Always refer to the tire pressure label on the driver's door jamb for specific recommendations.

How often should the suspension components be inspected?

BMW recommends inspecting the suspension components every 30,000 miles or 24 months, whichever comes first. Key components to check include the shock absorbers, struts, control arms, bushings, and ball joints. Regular inspections help identify wear and prevent potential safety issues.

Can the BMW 640i suspension be adjusted for different driving modes?

Yes, the BMW 640i with the optional Adaptive M Suspension allows for dynamic adjustment of the suspension settings. The system adapts to driving conditions and can be manually adjusted through the Driving Dynamics Control system, offering Comfort, Sport, and Sport+ modes for varying levels of ride firmness and handling precision.

What is the ride height of the BMW 640i?

The ride height of the 2018-Present BMW 640i is approximately 5.7 inches (145 mm) at the front and 5.9 inches (150 mm) at the rear. This measurement is taken from the ground to the bottom of the vehicle's chassis and may vary slightly depending on tire size and suspension configuration.

Are there any common issues with the BMW 640i suspension?

Common issues include premature wear of suspension bushings, leaking shock absorbers, and noise from worn ball joints. These issues are often due to high mileage or aggressive driving. Regular maintenance and using genuine BMW parts can mitigate these problems.

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 Suspension Maintenance Guide

Coming Soon

A detailed guide on maintaining the suspension system, including inspection intervals, common issues, and replacement procedures.

Adaptive M Suspension Overview

Coming Soon

Learn about the features and benefits of the Adaptive M Suspension system, including how it enhances driving dynamics and comfort.

BMW Genuine Suspension Parts Catalog

Coming Soon

Access the official catalog of genuine BMW suspension parts, ensuring compatibility and optimal performance for your 640i.

Suspension Troubleshooting and Diagnostics

Coming Soon

A comprehensive resource for diagnosing and troubleshooting common suspension issues in the BMW 640i.

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