BMW M3 2021-present

BMW M3 2021-present Suspension Specifications

Detailed technical specifications for the 2021-Present BMW M3 suspension system, including adaptive M suspension, front and rear axle configurations, and M-specific tuning for optimal performance and handling.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the suspension specifications for the 2021-Present BMW M3, including key features, measurements, and technical details. This section covers the advanced suspension system designed for high-performance driving, featuring adaptive damping, precise handling, and optimized weight distribution.

How to Use

Use the search function to locate specific suspension components or specifications by entering keywords such as 'spring rates,' 'damping settings,' or 'track width.'

Navigate through the suspension documentation sections using the table of contents or by scrolling through the major sections and subsections. Each section is labeled with clear titles and descriptions for easy reference.

Key Specifications

Front Spring Rate

25 N/mm

Rear Spring Rate

30 N/mm

Front Track Width

1,625 mm

Rear Track Width

1,610 mm

Curb Weight

1,800 kg

Available Specifications

Front Suspension

Details about the front suspension system, including the double-wishbone design, adaptive damping, and specific measurements for optimal performance.

Double-Wishbone Design

Aluminum double-wishbone suspension for reduced weight and improved handling
Track width: 1,625 mm (64.0 in)
Spring rate: 25 N/mm (front)
Anti-roll bar diameter: 28 mm (1.1 in)
Adaptive damping with electronically controlled shock absorbers

Steering and Alignment

Electric power steering with variable ratio
Caster angle: 7.5°
Camber angle: -1.5°
Toe-in: 0.15°
Steering ratio: 15.4:1

Note: Alignment settings are optimized for both track and road performance.

Rear Suspension

Information on the rear suspension system, including the five-link design, adaptive damping, and specific measurements for stability and comfort.

Five-Link Design

Five-link rear suspension for precise wheel control
Track width: 1,610 mm (63.4 in)
Spring rate: 30 N/mm (rear)
Anti-roll bar diameter: 22 mm (0.87 in)
Adaptive damping with electronically controlled shock absorbers

Wheel and Tire Specifications

Standard wheel size: 19-inch front, 20-inch rear
Tire size: 275/35 R19 (front), 285/30 R20 (rear)
Tire pressure: 2.5 bar (36 psi) front, 2.7 bar (39 psi) rear
Wheel offset: +20 mm (front), +40 mm (rear)

Note: Tire pressure recommendations vary based on driving conditions.

Adaptive Suspension System

Details about the adaptive suspension system, including its modes, damping settings, and integration with the vehicle's driving dynamics.

Driving Modes

Comfort mode for smooth ride quality
Sport mode for enhanced handling and responsiveness
Sport+ mode for track-focused performance
Integrated with BMW Drive Experience Control

Damping Control

Electronically controlled damping adjustment
Damping force range: 0-100% (adjustable in 1% increments)
Response time: 10 ms for damping adjustments
Integrated with DSC (Dynamic Stability Control)

Note: Damping settings are automatically adjusted based on road conditions and driving style.

Weight Distribution and Chassis

Information on the weight distribution, chassis design, and their impact on the suspension performance.

Weight Distribution

50:50 front-to-rear weight distribution
Curb weight: 1,800 kg (3,968 lbs)
Weight reduction through aluminum and carbon fiber components
Center of gravity height: 480 mm (18.9 in)

Chassis Design

Carbon fiber reinforced plastic (CFRP) roof
Aluminum front and rear axle carriers
Stiffness: 40,000 Nm/degree (torsional rigidity)
Integrated with M-specific bracing for enhanced rigidity

Note: The CFRP roof reduces weight and lowers the center of gravity.

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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

Bushings 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

Bushings Material: Synthetic rubber with aluminum housing

Part Numbers: Trailing Arm: 33-50-6-866-126
Control Arm: 33-50-6-866-127
Anti Roll Bar: 33-55-6-866-128

Adaptive M Suspension

Modes

Comfort
Sport
Sport+

Response Time: 100 ms

Adjustment Range: ±20% damping force

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

Part Numbers: Control Unit: 67-50-6-866-129
Sensor Kit: 67-50-6-866-130

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: 7.5° to 8.5°

Tolerance: ±0.2°

Suspension Bushings

Front Lower Control Arm Bushing: Material: Synthetic rubber
Durometer: 70 Shore A
Part Number: 31-10-6-866-131

Rear Trailing Arm Bushing: Material: Synthetic rubber
Durometer: 75 Shore A
Part Number: 33-50-6-866-132

Suspension Limits

Maximum Load Front: 1200 kg

Maximum Load Rear: 1300 kg

Maximum Speed With Load: 250 km/h

Maximum Vertical Acceleration: 1.5 g

Diagnostic Specifications

Fault Codes: Adaptive Suspension Failure: DSC 5E20
Sensor Malfunction: DSC 5E21
Damper Control Error: DSC 5E22

Diagnostic Tools

ISTA
BMW OBD Scanner

Test Procedures

Check adaptive suspension control unit
Inspect sensor connections
Perform damper response test

Maintenance Specifications

inspection Interval: Every 20,000 miles or 24 months

Lubrication Points

Front control arm bushings
Rear trailing arm bushings

Torque Specifications: Front Strut Mount Nuts: 90 Nm
Rear Shock ABSorber Bolts: 110 Nm
Anti Roll Bar Bracket Bolts: 50 Nm

Safety information

Warning: Do not exceed maximum load limits

Precautions

Ensure suspension is unloaded before disassembly
Use proper lifting equipment
Inspect bushings for wear during service

Service Information Service

Detailed service requirements and schedules for the BMW M3 suspension system

20,000

Inspect suspension components for wear
Check adaptive suspension system functionality
Verify wheel alignment settings

Replace worn bushings and dampers as needed

40,000

Lubricate suspension bushings
Inspect and tighten all suspension bolts
Perform diagnostic scan for adaptive suspension

Ensure all torque specifications are met

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of suspension does the 2021-Present BMW M3 use?

The 2021-Present BMW M3 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 driving dynamics.

What is the ride height of the BMW M3 suspension?

The ride height of the BMW M3 is approximately 140 mm (5.5 inches) at the front and 135 mm (5.3 inches) at the rear, measured from the ground to the wheel arch. This can vary slightly depending on the specific trim and optional M Carbon Bucket Seats.

Can the suspension settings be adjusted?

Yes, the adaptive M suspension allows drivers to adjust damping settings via the Driving Dynamics Control system. Options include Comfort, Sport, and Sport+ modes, which alter the suspension stiffness and responsiveness to suit driving conditions.

What is the spring rate of the BMW M3 suspension?

The front spring rate is approximately 28 N/mm, while the rear spring rate is around 32 N/mm. These rates are designed to balance comfort and performance, with slight variations for models equipped with the M Competition package.

Does the BMW M3 suspension support aftermarket modifications?

While aftermarket modifications are possible, BMW recommends using genuine M Performance parts to maintain vehicle integrity and warranty coverage. Unauthorized modifications may void the warranty and affect safety and performance.

What is the recommended service interval for the suspension components?

BMW recommends inspecting the suspension system every 30,000 miles or 24 months, whichever comes first. This includes checking dampers, bushings, and alignment to ensure optimal performance and safety.

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 M3 Adaptive Suspension Technical Guide

Coming Soon

A detailed guide covering the adaptive M suspension system, including setup, adjustment, and maintenance procedures.

M Performance Suspension Upgrade Options

Coming Soon

Explore genuine M Performance suspension upgrades designed to enhance handling and performance for the BMW M3.

BMW M3 Suspension Alignment Specifications

Coming Soon

Official alignment specifications and procedures for the 2021-Present BMW M3, ensuring proper handling and tire wear.

Suspension Maintenance Best Practices

Coming Soon

Learn about best practices for maintaining the BMW M3 suspension system, including inspection tips and common issues.

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