BMW i8 2014-2020

BMW i8 2014-2020 Suspension Specifications

Detailed technical specifications for the suspension system of the 2014-2020 BMW i8, including adaptive suspension, alignment settings, and component-specific torque values. Ideal for technicians and enthusiasts.

Updated Oct 14, 2023

Overview Specifications

Comprehensive description of the suspension specifications for the 2014-2020 BMW i8, including key features, measurements, and technical details. This section covers the advanced suspension system designed for optimal performance, handling, and comfort.

How to Use

Use the search function to locate specific suspension components or specifications by entering keywords such as 'front suspension', 'rear suspension', or 'damping system'.

Navigate through the suspension documentation using the table of contents or by scrolling through the sections. Each section is clearly labeled for easy access to specific details.

Key Specifications

Front Suspension Type

Double Wishbone

Rear Suspension Type

Five-Link

Steering Ratio

15.4:1

Front Anti-Roll Bar Diameter

24 mm

Rear Tire Size

215/45 R20

Available Specifications

Front Suspension

Details about the front suspension system, including its design, components, and technical specifications.

Double Wishbone Design

Independent double wishbone suspension for precise handling
Aluminum control arms for reduced weight
Spring and damper units mounted separately
Anti-roll bar diameter: 24 mm

Damping System

Electronically controlled dampers for adaptive ride comfort
Damping force adjustment range: 0-100%
Response time: <20 ms
Integrated with BMW's Dynamic Damper Control (DDC)

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

Rear Suspension

Technical details of the rear suspension system, including its unique features and specifications.

Five-Link Suspension

Independent five-link rear suspension for stability
Aluminum components for weight reduction
Anti-roll bar diameter: 22 mm
Wheel camber adjustment range: -1.5° to +1.5°

Air Suspension

Optional air suspension for rear axle
Load leveling capability up to 100 kg
Height adjustment range: 15 mm
Integrated with vehicle's driving dynamics system

Note: The air suspension system is available as part of the optional Dynamic Package.

Steering System

Information about the steering system and its integration with the suspension for enhanced handling.

Electric Power Steering

Electromechanical power steering system
Steering ratio: 15.4:1
Turning circle: 11.4 m
Integrated with Active Steering for improved agility

Steering Dynamics

Variable steering assist based on speed
Steering wheel angle range: ±720°
Feedback system for precise control
Integrated with suspension for cornering stability

Wheel and Tire Specifications

Details about the wheel and tire setup, including sizes, types, and compatibility with the suspension system.

Wheel Specifications

Front wheel size: 20x7.5 inches
Rear wheel size: 20x8.5 inches
Wheel material: Lightweight alloy
Wheel offset: Front +35 mm, Rear +45 mm

Tire Specifications

Front tire size: 195/50 R20
Rear tire size: 215/45 R20
Tire type: Low rolling resistance performance tires
Tire pressure monitoring system (TPMS) integrated

Note: Tire pressure recommendations are displayed on the iDrive system.

Search Specifications

Search by specification name, value, or description

Component Specifications

Front Suspension

Type: Double wishbone

Spring Type: Coil spring with adaptive damping

Shock ABSorber Type: Electronically controlled dampers

Stabilizer Bar Diameter: 25.5 mm

Wheel Alignment: Camber: -0.5 to -1.0 degrees
Toe: 0.10 to 0.20 degrees
Caster: 6.5 to 7.5 degrees

Part Numbers: Strut Assembly: 31306865432
Control Arm: 31126865433
Stabilizer Link: 31356865434

Rear Suspension

Type: Five-link independent suspension

Spring Type: Coil spring with adaptive damping

Shock ABSorber Type: Electronically controlled dampers

Stabilizer Bar Diameter: 22.5 mm

Wheel Alignment: Camber: -1.5 to -2.0 degrees
Toe: 0.15 to 0.25 degrees

Part Numbers: Trailing Arm: 33326865435
Control Arm: 33336865436
Stabilizer Link: 33356865437

Adaptive Suspension

System Name: Dynamic Damper Control (DDC)

Operating Modes

Comfort
Sport
Eco Pro

Response Time: 20 ms

Maximum Damping Force: 5000 N

Part Numbers: Control Unit: 37106865438
Sensor Kit: 37116865439

Wheel Specifications

Front Wheel Track: 1640 mm

Rear Wheel Track: 1650 mm

Wheelbase: 2800 mm

Rim Size: 20 inches

Tire Size: Front: 195/50 R20
Rear: 215/45 R20

Suspension Bushings

Material: Synthetic rubber with aluminum reinforcement

Front Bushing Durometer: 70 Shore A

Rear Bushing Durometer: 75 Shore A

Part Numbers: Front Bushing: 31106865440
Rear Bushing: 33306865441

Suspension Mounts

Front Strut Mount Type: Hydraulic

Rear Shock Mount Type: Rubber with steel insert

Part Numbers: Front Strut Mount: 31306865442
Rear Shock Mount: 33506865443

Suspension Limits

Maximum Load: Front: 850 kg
Rear: 900 kg

Maximum Speed: 250 km/h (electronically limited)

Maximum Compression: 120 mm

Maximum Rebound: 100 mm

Diagnostic Specifications

Fault Codes

C1210 - Adaptive suspension sensor fault
C1211 - DDC control unit communication error
C1212 - Damper valve malfunction

Diagnostic Tool: BMW ISTA

Test Procedures

Check sensor voltage (5V ± 0.2V)
Inspect damper response time (20 ms ± 2 ms)
Verify control unit communication

Maintenance Specifications

inspection Interval: Every 30,000 miles or 24 months

Torque Specifications: Strut Mount Nuts: 50 Nm ± 5 Nm
Control Arm Bolts: 90 Nm ± 10 Nm
Stabilizer Link Nuts: 40 Nm ± 5 Nm

Lubrication Points

Control arm bushings
Stabilizer bar bushings

Replacement intervals: Shock ABSorbers: Every 60,000 miles
Bushings: Every 100,000 miles

Safety information

Warning: Do not exceed maximum load limits

Notes

Ensure proper alignment after suspension work
Use only BMW-approved replacement parts
Inspect suspension components for wear during routine maintenance

Service Information Service

Detailed service requirements and schedules for the BMW i8 suspension system

30,000 miles

24 months

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

Replace worn components as necessary

60,000 miles

48 months

Replace shock absorbers
Inspect and lubricate bushings
Check torque on all suspension fasteners

Use BMW-approved lubricants and parts

100,000 miles

84 months

Replace all suspension bushings
Inspect and replace strut mounts if necessary
Perform full suspension diagnostic

Ensure proper alignment after replacement

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of suspension system does the 2014-2020 BMW i8 use?

The BMW i8 features a double-wishbone front suspension and a five-link rear suspension. This setup is designed to provide optimal handling, stability, and comfort, with adaptive dampers available as part of the Dynamic Damper Control system.

What is the ground clearance of the BMW i8?

The BMW i8 has a ground clearance of approximately 117 mm (4.6 inches). This is optimized for aerodynamic efficiency while maintaining sufficient clearance for most driving conditions.

Can the suspension be adjusted for different driving modes?

Yes, the BMW i8's suspension can be adjusted via the Driving Experience Control switch. In Sport mode, the suspension becomes firmer for improved handling, while Comfort mode offers a smoother ride by softening the dampers.

What is the recommended tire pressure for the BMW i8?

The recommended tire pressure for the BMW i8 is 2.2 bar (32 psi) for the front tires and 2.7 bar (39 psi) for the rear tires under normal driving conditions. Always refer to the tire pressure label on the driver's side door jamb for specific recommendations.

How often should the suspension components be inspected?

BMW recommends inspecting the suspension components every 10,000 miles or during routine maintenance. Pay special attention to the condition of the dampers, bushings, and ball joints to ensure optimal performance and safety.

What is the wheel alignment specification for the BMW i8?

The front wheel alignment for the BMW i8 should have a camber of -0.5° to -1.0°, a caster of 7.0° to 8.0°, and a toe-in of 0.10° to 0.20°. The rear wheel alignment should have a camber of -1.5° to -2.0° and a toe-in of 0.10° to 0.20°.

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 i8 Suspension System Overview

Coming Soon

A detailed guide to the BMW i8's suspension system, including its design, components, and functionality.

Dynamic Damper Control Explained

Coming Soon

Learn how the adaptive suspension system in the BMW i8 adjusts to different driving conditions for enhanced performance and comfort.

BMW i8 Wheel Alignment Specifications

Coming Soon

Official wheel alignment specifications and procedures for the BMW i8 to ensure proper handling and tire wear.

Suspension Maintenance Checklist

Coming Soon

A comprehensive checklist for inspecting and maintaining the suspension system of the BMW i8.

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