BMW M4 2014-2020

BMW M4 2014-2020 Suspension Specifications

Explore the detailed suspension specifications for the 2014-2020 BMW M4, including front and rear suspension components, alignment settings, spring rates, and damper configurations. Ideal for technicians and enthusiasts.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the suspension specifications for the 2014-2020 BMW M4, including key features, measurements, and technical details. This section covers the front and rear suspension systems, adaptive suspension technology, and alignment specifications.

How to Use

Use the search function to locate specific suspension components or specifications by entering keywords such as 'front strut', 'rear axle', or 'alignment angles'.

Navigate through the suspension documentation sections using the table of contents. Each major section is divided into subsections for detailed technical information.

Key Specifications

Front Spring Rate

28 N/mm

Rear Spring Rate

32 N/mm

Front Anti-Roll Bar Diameter

25.5 mm

Rear Anti-Roll Bar Diameter

20 mm

Track Width

1572 mm

Available Specifications

Front Suspension

Details of the front suspension system, including the strut assembly, control arms, and steering components.

Strut Assembly

MacPherson strut design with aluminum components
Spring rate: 28 N/mm (front)
Strut diameter: 55 mm
Adaptive damping system with electronically controlled valves

Control Arms and Bushings

Forged aluminum control arms for reduced weight
Front lower control arm bushing stiffness: 450 N/mm
Anti-roll bar diameter: 25.5 mm
Ball joint type: Maintenance-free, sealed design

Note: The adaptive damping system adjusts damping force based on driving conditions and selected driving mode.

Rear Suspension

Technical details of the rear suspension system, including the multi-link setup, differential, and adaptive components.

Multi-Link Suspension

Five-link rear suspension with aluminum components
Spring rate: 32 N/mm (rear)
Rear anti-roll bar diameter: 20 mm
Electronically controlled rear differential

Adaptive Damping

Rear shock absorber diameter: 46 mm
Damping force adjustment range: 0-100% in 0.1-second intervals
Integrated with BMW's Dynamic Damper Control (DDC) system
Compatible with Comfort, Sport, and Sport+ driving modes

Alignment Specifications

Factory-recommended alignment settings for the BMW M4, including camber, caster, and toe angles.

Front Alignment

Camber angle: -1.5° to -1.0°
Caster angle: 7.5° to 8.0°
Toe angle: 0.10° to 0.20° (toe-in)
Steering axis inclination: 12.5°

Rear Alignment

Camber angle: -2.0° to -1.5°
Toe angle: 0.15° to 0.25° (toe-in)
Thrust angle: 0.0°
Track width: 1572 mm

Note: Alignment settings may vary slightly depending on tire and wheel package.

Adaptive Suspension Technology

Overview of the adaptive suspension system, including its integration with driving dynamics and modes.

Dynamic Damper Control (DDC)

Real-time damping force adjustment
Three driving modes: Comfort, Sport, and Sport+
Adjustment frequency: 100 Hz
Integrated with BMW's Driving Dynamics Control system

Integration with M Drive

Customizable suspension settings via M Drive menu
Linked to throttle response, steering, and stability control
Compatible with Launch Control for optimal performance
System weight: 12.5 kg (including all components)

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: Electronically controlled dampers

Anti Roll Bar Diameter: 28.5 mm

Bushing Material: Synthetic rubber with aluminum housing

Part Numbers: Strut Assembly: 31307849601
Control Arm: 31107849602
Anti Roll Bar: 31357849603

Rear Suspension

Type: Five-link with adaptive M suspension

Spring Rate: 36 N/mm

Shock ABSorber Type: Electronically controlled dampers

Anti Roll Bar Diameter: 22.5 mm

Bushing Material: Synthetic rubber with aluminum housing

Part Numbers: Trailing Arm: 33307849604
Control Arm: 33327849605
Anti Roll Bar: 33557849606

Adaptive M Suspension

System Type: Dynamic Damper Control (DDC)

Adjustment Modes

Comfort
Sport
Sport+

Response Time: 20 ms

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

Part Numbers: Control Unit: 37107849607
Sensor Kit: 37117849608

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°

Ride Height

Front Ground Clearance: 120 mm

Rear Ground Clearance: 125 mm

Adjustment Range: ±10 mm

Tolerance: ±2 mm

Bushings And Mounts

Front Lower Control Arm Bushing: Polyurethane with aluminum housing

Rear Trailing Arm Bushing: Polyurethane with aluminum housing

Shock ABSorber Mount Material: Reinforced rubber

Part Numbers: Front Bushing: 31127849609
Rear Bushing: 33337849610
Shock Mount: 31337849611

Torque Specifications

Front Strut Mount Nuts: 50 Nm + 90°

Rear Shock ABSorber Bolts: 70 Nm + 45°

Control Arm Bolts: 100 Nm

Anti Roll Bar Link Nuts: 25 Nm

Wheel Bolts: 120 Nm

Diagnostic Specifications

Fault Codes: DDC System Error: 5E20
Sensor Malfunction: 5E21
Damper Failure: 5E22

Diagnostic Tool: BMW ISTA

Test Procedures

Check DDC control unit for fault codes
Inspect sensor connections and wiring
Perform damper response test

Maintenance Specifications

inspection Interval: Every 30,000 miles or 24 months

Lubrication Points

Control arm bushings
Anti-roll bar links
Shock absorber mounts

Replacement intervals: Shock ABSorbers: 60,000 miles
Bushings: 50,000 miles
Anti-Roll Bar Links: 40,000 miles

Safety information

Max Load Front Axle: 1200 kg

Max Load Rear Axle: 1300 kg

Max Speed With Load: 250 km/h

Warning: Do not exceed specified load limits or adjust suspension components without proper tools and training.

Service Information Service

Detailed service requirements and schedules for the BMW M4 suspension system

30,000 miles

24 months

Inspect suspension components for wear
Check wheel alignment
Lubricate bushings and mounts

Replace worn components as necessary

60,000 miles

48 months

Replace shock absorbers
Inspect and replace bushings if needed
Check adaptive suspension system functionality

Use only BMW-approved parts for replacements

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of suspension system does the 2014-2020 BMW M4 use?

The 2014-2020 BMW M4 is equipped with a double-wishbone front suspension and a five-link rear suspension. It also features Adaptive M Suspension with electronically controlled dampers, allowing drivers to adjust the suspension settings for comfort or sportier handling.

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 model year and optional suspension packages.

Can the suspension be manually adjusted?

Yes, the Adaptive M Suspension allows drivers to manually adjust the damping characteristics via the Driving Dynamics Control system. Options include Comfort, Sport, and Sport+ modes, which alter the suspension stiffness and responsiveness.

What is the spring rate for the BMW M4 suspension?

The front spring rate is approximately 27 N/mm, and the rear spring rate is around 80 N/mm. These values are specific to the standard suspension setup and may vary with optional configurations like the M Competition Package.

Does the BMW M4 suspension require special maintenance?

Yes, the suspension components, including the adaptive dampers and bushings, should be inspected regularly for wear and tear. BMW recommends a professional inspection every 30,000 miles or as specified in the owner's manual. Use only genuine BMW parts for replacements to ensure optimal performance and safety.

What is the maximum load capacity for the BMW M4 suspension?

The maximum load capacity for the BMW M4 suspension is 1,785 lbs (810 kg), including passengers and cargo. Exceeding this limit can compromise suspension performance and safety.

Are there any common issues with the BMW M4 suspension?

Some owners have reported issues with premature wear of the adaptive dampers and bushings, particularly in high-performance driving conditions. Regular inspections and adherence to BMW's maintenance schedule can help mitigate these issues.

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 Suspension Technical Guide

Coming Soon

A detailed guide covering the technical specifications, maintenance procedures, and troubleshooting tips for the BMW M4 suspension system.

Adaptive M Suspension Overview

Coming Soon

Learn about the features and functionality of the Adaptive M Suspension system, including how to adjust settings for optimal performance.

BMW Genuine Suspension Parts Catalog

Coming Soon

Access the official catalog of genuine BMW suspension parts, including dampers, springs, and bushings, to ensure proper maintenance and repairs.

BMW M4 Suspension Maintenance Schedule

Coming Soon

A comprehensive maintenance schedule for the BMW M4 suspension system, including inspection intervals and recommended service procedures.

Performance Driving and Suspension Care

Coming Soon

Tips and best practices for maintaining your BMW M4 suspension during high-performance driving, including track use.

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