BMW M4 2021-present

BMW M4 2021-present Suspension Specifications

Detailed technical specifications for the suspension system of the 2021-Present BMW M4, covering front and rear suspension configurations, adaptive suspension features, and alignment settings.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the suspension specifications for the 2021-Present BMW M4, including key features, measurements, and technical details. This section covers the advanced suspension system designed for high-performance driving, ensuring optimal handling, stability, and comfort.

How to Use

Use the search function to locate specific suspension components or specifications by entering keywords such as 'spring rate', 'dampers', or 'anti-roll bar'.

Navigate through the suspension documentation by selecting the relevant section from the table of contents or using the sidebar menu to jump to specific topics.

Key Specifications

Front Spring Rate

180 N/mm

Rear Spring Rate

200 N/mm

Front Anti-Roll Bar Diameter

28 mm

Rear Anti-Roll Bar Diameter

22 mm

Rear-Wheel Steering Angle

±2.5 degrees

Available Specifications

Front Suspension

Details of the front suspension system, including components, measurements, and performance characteristics.

Double-Wishbone Design

Aluminum double-wishbone front suspension for reduced weight and improved handling
Spring rate: 180 N/mm (standard configuration)
Adjustable camber and caster settings for track optimization
Anti-roll bar diameter: 28 mm
Electronically controlled dampers with adaptive damping system

Steering System

Electromechanical power steering with variable ratio
Steering ratio: 15.4:1
Turning circle: 11.8 meters
Integrated dynamic stability control for precise handling

Note: The steering system is tuned for both comfort and sporty driving modes.

Rear Suspension

Technical details of the rear suspension system, including multi-link design and performance enhancements.

Five-Link Rear Suspension

Five-link rear suspension with aluminum components for weight reduction
Spring rate: 200 N/mm (standard configuration)
Anti-roll bar diameter: 22 mm
Electronically controlled dampers with adaptive damping system
Integrated rear-wheel steering for improved agility

Rear-Wheel Steering

Rear-wheel steering angle: ±2.5 degrees
Enhances stability at high speeds and maneuverability at low speeds
Integrated with the Dynamic Stability Control (DSC) system
Adjustable via the M Drive settings

Note: Rear-wheel steering is optional and part of the M Carbon Package.

Adaptive Suspension System

Overview of the adaptive suspension system, including modes and technical specifications.

Adaptive M Suspension

Electronically controlled dampers with three modes: Comfort, Sport, and Sport+
Damping force adjustment range: 0-100% in 0.1-second intervals
Integrated with the M Drive system for customizable settings
Automatic load leveling for consistent ride height

Driving Dynamics Control

Integrated with the Dynamic Stability Control (DSC) system
Adjustable throttle response, steering, and damping settings
Track mode disables DSC for advanced driver control
Real-time monitoring of suspension performance

Note: The system adapts to driving conditions and road surfaces automatically.

Wheels and Tires

Specifications for the wheels and tires, including sizes, materials, and performance characteristics.

Standard Wheel Configuration

Front wheel size: 19 x 9.5 inches
Rear wheel size: 20 x 10.5 inches
Forged aluminum wheels for reduced unsprung weight
Tire sizes: 275/35 R19 (front), 285/30 R20 (rear)

Optional M Carbon Wheels

Carbon fiber-reinforced wheels for maximum weight reduction
Front wheel weight reduction: 7.5 kg per wheel
Rear wheel weight reduction: 8.5 kg per wheel
Tire sizes: 275/35 R19 (front), 285/30 R20 (rear)

Note: M Carbon Wheels are part of the M Carbon Package.

Search Specifications

Search by specification name, value, or description

Component Specifications

Front Suspension

Type: Double-wishbone with adaptive M suspension

Spring Rate: 32 N/mm

Shock ABSorber Type: Adaptive M dampers

Anti Roll Bar Diameter: 28 mm

Bushing Material: Synthetic rubber with aluminum housing

Part Numbers: Strut Assembly: 31-30-6-866-123
Control Arm: 31-10-6-866-124
Anti Roll Bar: 31-35-6-866-125

Rear Suspension

Type: Five-link with adaptive M suspension

Spring Rate: 36 N/mm

Shock ABSorber Type: Adaptive M dampers

Anti Roll Bar Diameter: 22 mm

Bushing Material: Synthetic rubber with aluminum housing

Part Numbers: Trailing Arm: 33-30-6-866-126
Control Arm: 33-10-6-866-127
Anti Roll Bar: 33-35-6-866-128

Adaptive M Suspension

Adjustment Range: Comfort, Sport, Sport+

Response Time: 10 ms

Sensor Types

Accelerometers
Wheel position sensors

Control Unit Part Number: 67-12-6-866-129

Operational Temperature Range: -40°C to 85°C

Wheel Alignment

Front Camber: -1.5° to -0.5°

Rear Camber: -2.0° to -1.0°

Front Toe: 0.10° to 0.20°

Rear Toe: 0.15° to 0.25°

Caster Angle: 7.5° to 8.5°

Tolerance: ±0.2°

Suspension Bushings

Front Lower Control Arm Bushing: Material: Synthetic rubber
Durometer: 70 Shore A
Part Number: 31-30-6-866-130

Rear Trailing Arm Bushing: Material: Synthetic rubber
Durometer: 75 Shore A
Part Number: 33-30-6-866-131

Suspension Springs

Front Spring: Wire Diameter: 14 mm
Coil Diameter: 120 mm
Free Length: 320 mm
Part Number: 31-33-6-866-132

Rear Spring: Wire Diameter: 15 mm
Coil Diameter: 130 mm
Free Length: 340 mm
Part Number: 33-33-6-866-133

Shock ABSorbers

Front Shock ABSorber: Type: Twin-tube gas-filled
Stroke Length: 150 mm
Diameter: 45 mm
Part Number: 31-32-6-866-134

Rear Shock ABSorber: Type: Twin-tube gas-filled
Stroke Length: 160 mm
Diameter: 50 mm
Part Number: 33-32-6-866-135

Suspension Mounts

Front Strut Mount: Material: Aluminum with rubber isolator
Part Number: 31-31-6-866-136

Rear Shock Mount: Material: Aluminum with rubber isolator
Part Number: 33-31-6-866-137

Suspension Diagnostics

Fault Codes

C1210 - Adaptive suspension malfunction
C1211 - Front left damper fault
C1212 - Front right damper fault
C1213 - Rear left damper fault
C1214 - Rear right damper fault

Diagnostic Tool: BMW ISTA

Diagnostic Procedure: Perform system scan and check for fault codes

Suspension Maintenance

inspection Interval: Every 15,000 miles or 12 months

Lubrication Points

Front control arm bushings
Rear trailing arm bushings
Anti-roll bar links

Torque Specifications: Front Strut Bolts: 120 Nm
Rear Shock Bolts: 110 Nm
Control Arm Bolts: 90 Nm

Service Information Service

Detailed service requirements and schedules for the suspension system

15,000

Inspect suspension components for wear
Check shock absorbers for leaks
Verify wheel alignment settings

Replace worn components as necessary

30,000

Lubricate suspension bushings
Inspect adaptive suspension system
Check torque on all suspension bolts

Perform diagnostic scan for adaptive suspension

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of suspension does the 2021-Present BMW M4 use?

The 2021-Present BMW M4 features an adaptive M suspension system with electronically controlled dampers. It includes a double-joint spring strut front axle and a five-link rear axle, optimized for high-performance handling and comfort.

What is the ride height of the BMW M4?

The standard ride height of the BMW M4 is approximately 140 mm (5.5 inches) at the front and 135 mm (5.3 inches) at the rear. This can vary slightly depending on the specific trim and optional M Adaptive Suspension settings.

Can the suspension settings be adjusted?

Yes, the BMW M4 offers adjustable suspension settings through the Driving Experience Control switch. It includes Comfort, Sport, and Sport+ modes, which alter damper stiffness, steering response, and throttle mapping for different driving conditions.

What is the spring rate of the BMW M4 suspension?

The front spring rate is approximately 28 N/mm, and the rear spring rate is around 32 N/mm. These values are specific to the standard M4 configuration and may vary with optional M Performance parts or aftermarket modifications.

Does the BMW M4 have air suspension?

No, the BMW M4 does not come equipped with air suspension. It uses a traditional coil spring and damper setup with adaptive damping technology for precise handling and ride comfort.

What is the wheel alignment specification for the BMW M4?

The recommended wheel alignment settings for the BMW M4 are: Front Camber: -1.0° to -1.5°, Front Toe: 0.10° to 0.20°, Rear Camber: -1.8° to -2.3°, Rear Toe: 0.15° to 0.25°. These settings ensure optimal tire wear and handling performance.

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 M4 Adaptive Suspension Guide

Coming Soon

A detailed guide on the adaptive suspension system, including setup tips and driving mode recommendations.

M4 Suspension Maintenance Checklist

Coming Soon

A step-by-step checklist for inspecting and maintaining the suspension components to ensure peak performance.

BMW M4 Wheel Alignment Specifications

Coming Soon

Official BMW-recommended wheel alignment settings for the M4, including camber, caster, and toe adjustments.

M Performance Suspension Upgrade Guide

Coming Soon

Information on upgrading to M Performance suspension components, including part numbers and installation instructions.

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