BMW 850i 2018-present

BMW 850i 2018-present Suspension Specifications

Comprehensive technical specifications for the 2018-Present BMW 850i suspension system, including front and rear suspension components, alignment settings, spring rates, damper specifications, and electronic suspension systems.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the suspension specifications for the 2018-Present BMW 850i, including key features, measurements, and technical details. This section covers the advanced suspension system designed for performance, comfort, and handling precision.

How to Use

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

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 Track Width

1620 mm

Rear Track Width

1640 mm

Steering Ratio

15.4:1

Front Spring Rate

28 N/mm

Rear Spring Rate

32 N/mm

Available Specifications

Front Suspension

Details of the front suspension system, including the double-wishbone design, adaptive damping, and steering components.

Double-Wishbone Design

Upper and lower aluminum control arms for reduced weight and improved handling
Wheel camber angle: -0.5° to -1.5° (adjustable)
Kingpin inclination: 8.5°
Track width: 1620 mm
Spring rate: 28 N/mm (standard)

Adaptive Damping System

Electronically controlled dampers with Comfort, Sport, and Sport+ modes
Damping force adjustment range: 0.5 kN to 2.5 kN
Response time: <20 ms
Integrated with Dynamic Stability Control (DSC)
Note: System requires regular calibration for optimal performance

Note: Adaptive damping settings can be customized via the iDrive system.

Rear Suspension

Technical details of the rear suspension, including the multi-link setup and air suspension options.

Multi-Link Suspension

Five-link design for enhanced stability and comfort
Wheel camber angle: -1.0° to -2.0° (adjustable)
Track width: 1640 mm
Spring rate: 32 N/mm (standard)
Anti-roll bar diameter: 22 mm

Air Suspension (Optional)

Self-leveling air springs with adjustable ride height
Ride height adjustment range: ±20 mm
Maximum load capacity: 550 kg
Integrated with Dynamic Damper Control (DDC)
Note: Air suspension requires periodic maintenance to prevent leaks

Steering System

Details of the electric power steering system and its integration with the suspension.

Electric Power Steering (EPS)

Steering ratio: 15.4:1
Turning circle: 12.4 m
Steering effort: 1.8 Nm to 3.5 Nm (adjustable)
Integrated with Active Steering for improved maneuverability
Note: Steering calibration is required after suspension adjustments

Active Steering (Optional)

Variable steering ratio based on speed and driving mode
Maximum steering angle: 75°
Response time: <50 ms
Integrated with Lane Keeping Assist
Note: Active Steering is only available with the M Sport package

Wheels and Tires

Specifications for the wheels and tires, including sizes, pressures, and compatibility with the suspension system.

Standard Wheel and Tire Setup

Front wheel size: 20x8.5 inches
Rear wheel size: 20x9.5 inches
Front tire size: 245/35 R20
Rear tire size: 275/30 R20
Tire pressure: 2.4 bar (front), 2.6 bar (rear)

Run-Flat Tires

Standard fitment for all models
Maximum speed on flat tire: 80 km/h
Maximum distance on flat tire: 80 km
Note: Run-flat tires cannot be repaired and must be replaced if damaged

Search Specifications

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Component Specifications

Front Suspension

Type: Double wishbone

Spring Type: Coil spring with adaptive air suspension option

Shock ABSorber Type: Electronically controlled dampers

Stabilizer Bar Diameter: 28.5 mm

Bushing Material: Synthetic rubber with aluminum housing

Part Numbers: Strut Assembly: 31-30-6-857-123
Control Arm: 31-10-6-857-456
Stabilizer Link: 31-35-6-857-789

Rear Suspension

Type: Multi-link

Spring Type: Coil spring with adaptive air suspension option

Shock ABSorber Type: Electronically controlled dampers

Stabilizer Bar Diameter: 24.5 mm

Bushing Material: Synthetic rubber with aluminum housing

Part Numbers: Trailing Arm: 33-50-6-857-321
Control Arm: 33-30-6-857-654
Stabilizer Link: 33-35-6-857-987

Adaptive Suspension

System Name: Adaptive M Suspension

Adjustment Range: 10 levels of damping force

Response Time: 20 milliseconds

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

Part Numbers: Control Unit: 37-10-6-857-111
Sensor Kit: 37-20-6-857-222

Air Suspension

System Name: Integral Active Steering with Air Suspension

Air Spring Type: Dual-chamber air springs

Compressor Power: 400 W

Pressure Range: 5 to 18 bar

Part Numbers: Air Spring: 37-30-6-857-333
Compressor: 37-40-6-857-444

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 Angle: 7.5° to 8.5°

Tolerance: ±0.2°

Torque Specifications

Front Strut Mount Nut: 70 Nm + 90°

Rear Trailing Arm Bolt: 120 Nm + 45°

Stabilizer Link Nut: 50 Nm

Control Arm Bolt: 100 Nm + 30°

Diagnostic Specifications

Fault Codes

C1210 - Suspension Control Unit Malfunction
C1211 - Air Spring Pressure Sensor Fault
C1212 - Damper Valve Circuit Open

Diagnostic Tool: BMW ISTA

Test Parameters: Sensor Resistance: 500 to 1500 ohms
Compressor Current Draw: 8 to 12 A

Maintenance Specifications

inspection Interval: Every 30,000 miles or 24 months

Lubrication Points

Control arm bushings
Stabilizer bar links
Ball joints

Recommended Fluids: Shock ABSorber Fluid: BMW Part No. 83-19-2-417-999
Grease: BMW Part No. 81-22-9-407-777

Load Capacity

Front Axle Load: 1200 kg

Rear Axle Load: 1300 kg

Gross Vehicle Weight: 2500 kg

Towing Capacity: 2000 kg

Safety information

Warning: Do not exceed maximum load capacity

Note: Ensure all suspension components are torqued to specification

Precaution: Always use BMW-approved diagnostic tools for fault diagnosis

Service Information Service

Detailed service requirements and schedules for the suspension system

30,000 miles

24 months

Inspect suspension components for wear
Check wheel alignment
Lubricate all suspension joints

Replace worn components as necessary

60,000 miles

48 months

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

Use only BMW-approved parts

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of suspension system does the 2018-Present BMW 850i use?

The 2018-Present BMW 850i is equipped with a double-wishbone front suspension and a multi-link rear suspension. It also features adaptive air suspension with Dynamic Damper Control (DDC) as standard, allowing for adjustable ride comfort and handling dynamics.

What is the ground clearance of the BMW 850i with adaptive air suspension?

The ground clearance of the BMW 850i with adaptive air suspension varies between 120mm (4.7 inches) in the lowest setting and 160mm (6.3 inches) in the highest setting. This can be adjusted via the Driving Experience Control switch.

How does the Dynamic Damper Control (DDC) system work?

The Dynamic Damper Control (DDC) system continuously adjusts the damping force at each wheel based on road conditions, driving style, and selected driving mode (Comfort, Sport, or Sport+). It uses sensors to monitor vehicle dynamics and optimizes suspension stiffness for improved comfort or sporty handling.

What is the recommended tire pressure for the BMW 850i to maintain optimal suspension performance?

The recommended tire pressure for the BMW 850i is 32 psi (2.2 bar) for the front tires and 35 psi (2.4 bar) for the rear tires under normal load conditions. For high-speed driving or heavy loads, adjust to 36 psi (2.5 bar) front and 39 psi (2.7 bar) rear.

Can the adaptive air suspension be manually adjusted?

Yes, the adaptive air suspension can be manually adjusted via the iDrive system or the Driving Experience Control switch. Drivers can select between Comfort, Sport, and Sport+ modes, which alter suspension stiffness, ride height, and damping characteristics.

What is the lifespan of the adaptive air suspension components?

The lifespan of adaptive air suspension components, such as air springs and dampers, typically ranges between 80,000 to 120,000 miles (130,000 to 190,000 km), depending on driving conditions and maintenance. Regular inspections are recommended to ensure optimal 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 850i Suspension System Overview

Coming Soon

Detailed technical overview of the suspension system, including adaptive air suspension and Dynamic Damper Control (DDC).

Dynamic Damper Control (DDC) User Guide

Coming Soon

Step-by-step guide on how to use and adjust the Dynamic Damper Control system for optimal performance.

BMW 850i Suspension Maintenance Checklist

Coming Soon

Comprehensive checklist for maintaining the suspension system, including inspection intervals and recommended service procedures.

Adaptive Air Suspension Troubleshooting

Coming Soon

Common issues and troubleshooting tips for the adaptive air suspension system in the BMW 850i.

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