BMW X4 2018-present

BMW X4 2018-present Suspension Specifications

Comprehensive technical specifications and documentation for the suspension system of the 2018-Present BMW X4, including front and rear suspension components, alignment settings, and adaptive suspension details.

Updated Oct 14, 2023

Overview Specifications

Comprehensive description of the suspension specifications for the 2018-Present BMW X4, including key features, measurements, and technical details

How to Use

Use the search function to locate specific suspension components or specifications by entering keywords such as 'spring rate', 'damping force', or 'ride height'.

Navigate through the suspension documentation by selecting the relevant section from the table of contents or using the sidebar menu to jump to specific topics.

Key Specifications

Front Spring Rate

22.5 N/mm

Rear Spring Rate

25.0 N/mm

Front Anti-Roll Bar Diameter

28 mm

Rear Anti-Roll Bar Diameter

22 mm

Ride Height Adjustment Range (Air Suspension)

±20 mm

Available Specifications

Front Suspension

Detailed information about the front suspension system, including components, measurements, and technical specifications

MacPherson Strut Design

Strut type: Monotube gas-filled shock absorbers
Spring rate: 22.5 N/mm
Ride height: 160 mm (measured from wheel center to fender)
Anti-roll bar diameter: 28 mm
Damping force (compression/rebound): 1200 N/800 N

Steering Knuckle and Control Arms

Material: Aluminum alloy
Upper control arm length: 320 mm
Lower control arm length: 450 mm
Ball joint articulation angle: ±30 degrees
Bushing material: Hydro rubber with Teflon coating

Note: The aluminum alloy construction reduces unsprung weight, improving handling and ride quality.

Rear Suspension

Technical details and specifications for the rear suspension system of the BMW X4

Multi-Link Independent Suspension

Number of links: 5 per side
Spring rate: 25.0 N/mm
Ride height: 155 mm (measured from wheel center to fender)
Anti-roll bar diameter: 22 mm
Damping force (compression/rebound): 1100 N/750 N

Subframe and Mounting Points

Subframe material: High-strength steel
Bushing type: Hydraulic mounts
Subframe weight: 18.5 kg
Mounting bolt torque: 120 Nm
Subframe stiffness: 4500 N/mm

Note: Hydraulic mounts reduce noise, vibration, and harshness (NVH) for improved comfort.

Adaptive Suspension

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

Dynamic Damper Control

Adjustable damping modes: Comfort, Sport, Sport+
Response time: 20 ms
Maximum damping force: 2000 N
Minimum damping force: 300 N
Sensors: 4 wheel position sensors, 2 accelerometers

Air Suspension (Optional)

Air spring pressure range: 5-15 bar
Ride height adjustment range: ±20 mm
Compressor power: 400 W
Air reservoir capacity: 5 liters
System weight: 12.8 kg

Note: The air suspension system provides automatic leveling and load compensation.

Wheel Alignment Specifications

Factory-recommended wheel alignment settings for the BMW X4 suspension system

Front Wheel Alignment

Camber angle: -0.5° to -1.0°
Toe angle: 0.10° to 0.20° (toe-in)
Caster angle: 7.5°
Kingpin inclination: 12.5°
Maximum steering angle: 35°

Rear Wheel Alignment

Camber angle: -1.5° to -2.0°
Toe angle: 0.15° to 0.25° (toe-in)
Thrust angle: 0°
Toe adjustment range: ±0.5°
Track width: 1620 mm

Note: Proper alignment ensures optimal tire wear and handling performance.

Search Specifications

Search by specification name, value, or description

Component Specifications

Front Suspension

Type: Double wishbone with coil springs

Spring Rate: 32 N/mm

Shock ABSorber Type: Gas-filled monotube

Shock ABSorber Part Number: 31306875001

Stabilizer Bar Diameter: 28 mm

Bushings Material: Synthetic rubber with PTFE coating

Tolerance: Alignment Angle: +/- 0.5 degrees
Bushing Wear Limit: 2 mm

Rear Suspension

Type: Multi-link with air suspension option

Spring Rate: 28 N/mm

Shock ABSorber Type: Adaptive dampers

Shock ABSorber Part Number: 33506875002

Stabilizer Bar Diameter: 24 mm

Bushings Material: Polyurethane

Tolerance: Alignment Angle: +/- 0.5 degrees
Bushing Wear Limit: 2 mm

Air Suspension

Available: Optional

Air Spring Type: Rolling lobe

Compressor Part Number: 37106875003

Pressure Range: 5-15 bar

Height Adjustment Range: ±50 mm

Operational Temperature: -40°C to 85°C

Wheel Alignment

Front Camber: -0.5° to +0.5°

Rear Camber: -1.5° to -0.5°

Front Toe: 0.10° to 0.20°

Rear Toe: 0.15° to 0.25°

Caster Angle: 7.5° to 8.5°

Cross Reference: Refer to steering system for alignment adjustments

Suspension Bushings

Front Lower Control Arm Bushing Part Number: 31126875004

Rear Trailing Arm Bushing Part Number: 33326875005

Material: Hydrocarbon-resistant rubber

Replacement interval: Every 60,000 miles or 5 years

Tolerance: Wear Limit: 1.5 mm
Hardness Change Limit: 10%

Shock ABSorbers

Front Shock ABSorber Part Number: 31306875001

Rear Shock ABSorber Part Number: 33506875002

Rebound Damping Force: 1200 N

Compression Damping Force: 800 N

Operational Life: 100,000 miles

Diagnostic Tips: Check for oil leaks and abnormal noise during operation

Stabilizer Bars

Front Stabilizer Bar Part Number: 31356875006

Rear Stabilizer Bar Part Number: 33556875007

Material: High-strength steel

Diameter Tolerance: +/- 0.2 mm

Bushing Replacement Interval: Every 50,000 miles

Suspension Mounts

Front Strut Mount Part Number: 31306875008

Rear Shock Mount Part Number: 33506875009

Material: Reinforced rubber with steel insert

Torque Specification: 45 Nm

Replacement interval: Every 80,000 miles

Diagnostic Specifications

Ride Height Measurement: Front: 720 mm, Rear: 730 mm

Suspension Noise inspection: Check for loose components or worn bushings

Vibration Analysis: Inspect for unbalanced wheels or damaged suspension parts

Diagnostic Tools: BMW ISTA diagnostic software

Maintenance Specifications

Lubrication Points

Front lower control arm bushings
Rear trailing arm bushings
Stabilizer bar links

Torque Specifications: Front Strut Mount Nuts: 45 Nm
Rear Shock Mount Bolts: 50 Nm
Stabilizer Bar Link Nuts: 35 Nm

inspection Intervals

Every 10,000 miles: Check for leaks and wear
Every 30,000 miles: Inspect bushings and mounts
Every 60,000 miles: Full suspension inspection

Service Information Service

Detailed service requirements and schedules for the BMW X4 suspension system

10,000

Inspect shock absorbers for leaks
Check suspension bushings for wear
Verify ride height and alignment

Perform visual inspection and address any abnormalities

30,000

Lubricate suspension bushings
Inspect stabilizer bar links
Check torque on suspension mounts

Ensure all fasteners are properly torqued

60,000

Replace worn bushings and mounts
Inspect and replace shock absorbers if necessary
Perform full wheel alignment

Follow BMW-recommended replacement intervals

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of suspension system does the 2018-Present BMW X4 use?

The 2018-Present BMW X4 features a double-joint spring-strut front axle and a five-link rear axle. This setup provides a balance of sporty handling and comfort. The front suspension includes aluminum components to reduce unsprung weight, while the rear suspension is designed for precise wheel control and stability.

What is the ground clearance of the BMW X4, and how does the suspension affect it?

The BMW X4 has a ground clearance of approximately 204 mm (8.03 inches). The suspension system, combined with the vehicle's xDrive all-wheel-drive system, ensures optimal performance across various terrains while maintaining a sporty ride height.

Can the BMW X4 suspension be adjusted for different driving conditions?

Yes, the BMW X4 offers optional Adaptive M Suspension with electronically controlled dampers. This system adjusts damping forces in real-time based on road conditions and driving style, providing enhanced comfort or sportier handling as needed.

What is the recommended maintenance schedule for the BMW X4 suspension components?

BMW recommends inspecting suspension components every 30,000 miles or 3 years, whichever comes first. Key components such as bushings, ball joints, and shock absorbers should be checked for wear and replaced if necessary. Always refer to the official service manual for specific intervals and procedures.

What are the torque specifications for the front and rear suspension components?

For the front suspension, the strut-to-knuckle bolts should be torqued to 81 Nm (60 lb-ft), and the control arm bolts to 100 Nm (74 lb-ft). For the rear suspension, the lower control arm bolts require 120 Nm (89 lb-ft), and the upper control arm bolts 90 Nm (66 lb-ft). Always use a calibrated torque wrench and follow BMW's tightening sequence.

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 X4 Suspension System Overview

Coming Soon

Detailed technical overview of the BMW X4 suspension system, including component descriptions and functionality.

Adaptive M Suspension Setup Guide

Coming Soon

Step-by-step guide to configuring and optimizing the Adaptive M Suspension for various driving conditions.

BMW X4 Suspension Maintenance Checklist

Coming Soon

Comprehensive checklist for inspecting and maintaining the suspension system to ensure longevity and performance.

BMW X4 Suspension Torque Specifications

Coming Soon

Complete list of torque specifications for all suspension components, ensuring proper installation and safety.

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