BMW i4 2022-present

BMW i4 2022-present Suspension Specifications

Comprehensive technical specifications for the 2022-Present BMW i4 suspension system, including front and rear suspension components, alignment settings, spring rates, damping characteristics, and torque specifications.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the suspension specifications for the 2022-Present BMW i4, including key features, measurements, and technical details. This section provides an in-depth look at the suspension system, designed to deliver a balance of comfort, performance, and efficiency.

How to Use

Use the search function to locate specific suspension specifications by entering keywords such as 'spring rate', 'damping force', or 'wheel alignment'. Use exact terms for precise results.

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

Key Specifications

Front Spring Rate

28 N/mm

Rear Spring Rate

32 N/mm

Front Anti-Roll Bar Diameter

24 mm

Rear Anti-Roll Bar Diameter

22 mm

Wheelbase

2,856 mm

Available Specifications

Front Suspension

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

MacPherson Strut Design

Utilizes a MacPherson strut configuration for compact design and weight savings
Spring rate: 28 N/mm
Damping force (compression): 1,200 N
Damping force (rebound): 1,800 N
Anti-roll bar diameter: 24 mm

Wheel Alignment Specifications

Camber angle: -0.5° to -1.0°
Toe angle: 0.1° to 0.3°
Caster angle: 7.5°
Kingpin inclination: 12.5°

Note: Alignment settings are optimized for electric vehicle dynamics and tire wear.

Rear Suspension

Information on the rear suspension system, including its multi-link design and performance characteristics.

Five-Link Independent Suspension

Features a five-link independent suspension for superior handling and ride comfort
Spring rate: 32 N/mm
Damping force (compression): 1,400 N
Damping force (rebound): 2,000 N
Anti-roll bar diameter: 22 mm

Wheel Alignment Specifications

Camber angle: -1.0° to -1.5°
Toe angle: 0.2° to 0.4°
Track width: 1,620 mm
Wheelbase: 2,856 mm

Adaptive Suspension

Details about the optional adaptive suspension system, including its functionality and technical specifications.

Dynamic Damper Control

Electronically controlled dampers adjust in real-time
Adjustable damping force range: 800 N to 2,500 N
Three driving modes: Comfort, Sport, and Eco Pro
Response time: 100 ms

Air Suspension (Optional)

Available as an optional upgrade
Air spring pressure range: 8 bar to 12 bar
Automatic leveling system maintains ride height
Load capacity: 500 kg

Note: Air suspension is recommended for enhanced comfort and load-carrying capability.

Suspension Materials

Overview of the materials used in the suspension system, focusing on weight reduction and durability.

Lightweight Aluminum Components

Control arms and knuckles made from forged aluminum
Weight reduction: 15% compared to steel components
Corrosion-resistant coating for longevity
Tensile strength: 350 MPa

High-Strength Steel

Used in critical load-bearing areas
Yield strength: 700 MPa
Heat-treated for enhanced durability
Weight-to-strength ratio optimized for performance

Search Specifications

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Component Specifications

Front Suspension

Type: Double-wishbone with adaptive air suspension

Spring Rate: 22.5 N/mm

Shock ABSorber Type: Electronically controlled dampers

Stabilizer Bar Diameter: 28 mm

Bushings Material: Synthetic rubber with aluminum housing

Part Numbers: Strut Assembly: 31-30-6-869-123
Control Arm: 31-10-6-869-456
Stabilizer Link: 31-35-6-869-789

Rear Suspension

Type: Five-link with adaptive air suspension

Spring Rate: 20.8 N/mm

Shock ABSorber Type: Electronically controlled dampers

Stabilizer Bar Diameter: 24 mm

Bushings Material: Synthetic rubber with aluminum housing

Part Numbers: Trailing Arm: 33-50-6-869-321
Control Arm: 33-10-6-869-654
Stabilizer Link: 33-35-6-869-987

Adaptive Air Suspension

Compressor Type: Single-piston electric compressor

Pressure Range: 8-16 bar

Air Spring Type: Rolling-lobe air springs

Height Adjustment Range: ±40 mm

Part Numbers: Compressor: 37-10-6-869-111
Air Spring: 37-20-6-869-222
Control Module: 37-30-6-869-333

Wheel Alignment

Front Camber: -0.5° to -1.0°

Rear Camber: -1.5° to -2.0°

Front Toe: 0.10° to 0.20°

Rear Toe: 0.15° to 0.25°

Caster: 7.5° to 8.5°

Tolerances: ±0.2° for all angles

Suspension Limits

Maximum Load Front: 950 kg

Maximum Load Rear: 1050 kg

Maximum Speed With Adaptive Suspension: 250 km/h

Minimum Ground Clearance: 120 mm

Maximum Ground Clearance: 160 mm

Diagnostic Specifications

Fault Codes

C1A20: Air suspension compressor malfunction
C1A21: Air spring pressure sensor fault
C1A22: Height sensor calibration error

Diagnostic Tool: BMW ISTA+

Sensor Resistance Range: 500-1500 ohms

Pressure Sensor Range: 0-20 bar

Maintenance Specifications

inspection Interval: Every 20,000 miles or 24 months

Lubrication Points

Control arm bushings
Stabilizer bar links
Ball joints

Torque Specifications: Strut Mount Nuts: 65 Nm
Control Arm Bolts: 90 Nm
Stabilizer Link Nuts: 40 Nm

Air Suspension Filter Replacement: Every 50,000 miles

Safety information

Warning: Do not operate vehicle with suspension warning light illuminated

Air Suspension Safety: Depressurize system before servicing

Jack Points

Front: Reinforced sill behind front wheel
Rear: Reinforced sill ahead of rear wheel

Maximum Jack Lift Height: 300 mm

Related Components

Steering System: Electric power steering (EPS)

Braking System: Integrated brake system (IBS)

Tire Specifications: Front Tire Size: 245/40 R19
Rear Tire Size: 275/35 R19
Recommended Pressure: 2.5 bar

Service Information Service

Detailed service requirements and schedules for the BMW i4 suspension system

20,000

Inspect suspension components for wear
Check air suspension system for leaks
Verify wheel alignment specifications

Replace air suspension filter if necessary

50,000

Replace air suspension filter
Lubricate all suspension bushings
Inspect and tighten all suspension bolts

Perform diagnostic scan for fault codes

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of suspension system does the 2022-Present BMW i4 use?

The BMW i4 features a double-wishbone front suspension and a five-link rear suspension. This setup is designed to provide a balance between sporty handling and ride comfort, with precise wheel control and reduced unsprung weight.

What is the ground clearance of the BMW i4?

The BMW i4 has a ground clearance of approximately 140 mm (5.5 inches). This measurement ensures optimal aerodynamics while maintaining sufficient clearance for most driving conditions.

Can the suspension be adjusted for different driving modes?

Yes, the BMW i4 offers adaptive suspension with optional Dynamic Damper Control. This system adjusts damping forces in real-time based on driving conditions and the selected driving mode (Comfort, Sport, or Eco Pro).

What is the wheel alignment specification for the BMW i4?

The recommended wheel alignment settings for the BMW i4 are: Front Camber: -0.5° to -1.0°, Front Toe: 0.05° to 0.15°, Rear Camber: -1.5° to -2.0°, Rear Toe: 0.10° to 0.20°. These settings ensure optimal tire wear and handling performance.

What is the maximum load capacity of the BMW i4 suspension?

The maximum load capacity of the BMW i4 suspension is 550 kg (1,213 lbs), including passengers and cargo. Exceeding this limit may compromise suspension 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 i4 Suspension System Overview

Coming Soon

Detailed technical overview of the BMW i4 suspension system, including design principles and component specifications.

Adaptive Suspension Setup Guide

Coming Soon

Step-by-step guide to configuring and optimizing the adaptive suspension settings for the BMW i4.

Wheel Alignment and Tire Wear

Coming Soon

Explains the relationship between wheel alignment settings, suspension geometry, and tire wear for the BMW i4.

Suspension Maintenance Schedule

Coming Soon

Official BMW maintenance schedule for inspecting and servicing the suspension components of the i4.

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