BMW 340i 2019-present

BMW 340i 2019-present Suspension Specifications

Explore the detailed suspension system specifications for the 2019-Present BMW 340i, including front and rear suspension components, alignment settings, and torque values. Ideal for technicians and enthusiasts.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the suspension specifications for the 2019-Present BMW 340i, including key features, measurements, and technical details

How to Use

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

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

Key Specifications

Front Spring Rate

28 N/mm

Rear Spring Rate

32 N/mm

Front Track Width

1,571 mm

Rear Track Width

1,580 mm

Adaptive Damping Response Time

100 ms

Available Specifications

Front Suspension

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

MacPherson Strut Design

Spring rate: 28 N/mm
Damping force (compression): 1,200 N
Damping force (rebound): 1,800 N
Track width: 1,571 mm
Anti-roll bar diameter: 25 mm

Steering Knuckle and Hub Assembly

Material: Aluminum alloy
Wheel hub bearing type: Double-row angular contact ball bearing
Brake rotor mounting: 5x112 mm bolt pattern
Steering axis inclination: 12.5°

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

Rear Suspension

Comprehensive details about the rear suspension system, including multi-link design and technical specifications

Multi-Link Independent Suspension

Spring rate: 32 N/mm
Damping force (compression): 1,400 N
Damping force (rebound): 2,000 N
Track width: 1,580 mm
Anti-roll bar diameter: 18 mm

Subframe and Bushings

Subframe material: Steel with aluminum reinforcement
Bushing material: Hydro rubber with dynamic damping
Subframe mounting points: 6 bolts per side
Bushing stiffness: 1,500 N/mm

Note: The hydro rubber bushings provide excellent vibration isolation while maintaining precise handling.

Adaptive Suspension

Technical details about the optional adaptive suspension system, including damping control and modes

Dynamic Damper Control

Damping adjustment range: 20% to 100%
Response time: 100 ms
Modes: Comfort, Sport, Sport+
Sensors: 4 wheel position sensors, 2 body accelerometers

Integration with Driving Modes

Comfort mode: Soft damping for smooth ride
Sport mode: Firmer damping for enhanced handling
Sport+ mode: Maximum damping for track performance
Automatic mode: Adjusts based on driving conditions

Note: The system continuously monitors road conditions and adjusts damping in real-time.

Wheel Alignment Specifications

Detailed alignment settings for the 2019-Present BMW 340i suspension system

Front Wheel Alignment

Camber: -0.5° to -1.0°
Caster: 7.5°
Toe-in: 0.10° to 0.20°
Kingpin inclination: 12.5°

Rear Wheel Alignment

Camber: -1.5° to -2.0°
Toe-in: 0.15° to 0.25°
Thrust angle: 0°
Track width difference: ±2 mm

Note: Proper alignment is critical for optimal tire wear and handling performance.

Search Specifications

Search by specification name, value, or description

Component Specifications

Front Suspension

Type: Double wishbone with adaptive dampers

Spring Rate: 28.5 N/mm

Damper Type: Electronic Damping Control (EDC)

Stabilizer Bar Diameter: 25.5 mm

Bushings Material: Synthetic rubber with aluminum housing

Part Numbers: Strut Assembly: 31-30-6-857-367
Stabilizer Bar: 31-35-6-857-369
Control Arm: 31-12-6-857-368

Rear Suspension

Type: Five-link independent suspension

Spring Rate: 32.0 N/mm

Damper Type: Electronic Damping Control (EDC)

Stabilizer Bar Diameter: 22.0 mm

Bushings Material: Synthetic rubber with aluminum housing

Part Numbers: Shock ABSorber: 33-52-6-857-370
Stabilizer Bar: 33-55-6-857-371
Trailing Arm: 33-32-6-857-372

Adaptive Suspension

System Name: Dynamic Damper Control (DDC)

Adjustment Range: 3 modes (Comfort, Sport, Sport+)

Response Time: 10 ms

Sensor Types

Acceleration sensors
Body motion sensors
Wheel position sensors

Part Numbers: Control Unit: 67-11-6-857-373
Sensor Kit: 67-12-6-857-374

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°

Tolerances: ±0.2° for all angles

Ride Height

Front Ground Clearance: 140 mm

Rear Ground Clearance: 145 mm

Minimum Ride Height: 135 mm (with adaptive suspension)

Maximum Ride Height: 150 mm (with adaptive suspension)

Tolerances: ±5 mm

Load Capacity

Front Axle Load: 980 kg

Rear Axle Load: 1020 kg

Total Vehicle Load: 2000 kg

Towing Capacity: 1800 kg (with trailer brake)

Torque Specifications

Front Strut Mount Nuts: 65 Nm

Rear Shock ABSorber Bolts: 90 Nm

Stabilizer Bar Link Nuts: 45 Nm

Control Arm Bolts: 120 Nm

Trailing Arm Bolts: 110 Nm

Diagnostic Specifications

Fault Codes

C1210 - Suspension system malfunction
C1211 - Adaptive damper failure
C1212 - Sensor signal out of range

Diagnostic Tool: BMW ISTA+

Test Procedures

Check sensor signals
Inspect damper response
Verify control unit communication

Maintenance Specifications

inspection Interval: Every 30,000 miles or 24 months

Lubrication Points

Control arm bushings
Stabilizer bar links
Trailing arm bushings

Replacement intervals: Shock ABSorbers: 60,000 miles
Bushings: 100,000 miles
Springs: Lifetime (inspect for damage)

Safety information

Warnings

Do not exceed maximum load capacity
Inspect suspension components after impact
Use only BMW-approved parts for replacements

Notes

Adaptive suspension requires recalibration after component replacement
Ensure proper alignment after suspension work

Service Information Service

Detailed service requirements and schedules for the suspension system

30,000 miles

24 months

Inspect suspension components for wear
Check alignment settings
Lubricate bushings and joints

Adaptive suspension requires diagnostic scan

60,000 miles

48 months

Replace shock absorbers
Inspect and replace worn bushings
Verify ride height and alignment

Use BMW-approved parts for replacements

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of suspension does the 2019-Present BMW 340i use?

The 2019-Present BMW 340i is equipped with a double-joint spring strut front axle and a five-link rear axle. This setup provides a balance of sporty handling and ride comfort. The front suspension features aluminum components to reduce unsprung weight, while the rear suspension is designed for precise wheel control and stability.

What is the ride height of the BMW 340i?

The standard ride height of the 2019-Present BMW 340i is approximately 140 mm (5.5 inches) at the front and 135 mm (5.3 inches) at the rear. These measurements may vary slightly depending on the specific trim, optional suspension packages, or aftermarket modifications.

Can the suspension be adjusted or upgraded?

Yes, the BMW 340i offers optional Adaptive M Suspension, which includes electronically controlled dampers that adjust to driving conditions in real-time. Additionally, BMW offers M Performance suspension upgrades, which lower the ride height by 10 mm and provide a firmer setup for enhanced handling. Aftermarket options are also available but may void the factory warranty if not installed by an authorized BMW service center.

What is the recommended tire pressure for the BMW 340i?

The recommended tire pressure for the 2019-Present BMW 340i is typically 32 psi (2.2 bar) for the front tires and 35 psi (2.4 bar) for the rear tires under normal load conditions. For full load conditions, increase the pressure to 36 psi (2.5 bar) for the front and 42 psi (2.9 bar) for the rear. Always refer to the tire pressure label on the driver's side door jamb for exact specifications.

How often should the suspension components be inspected?

BMW recommends inspecting the suspension components every 30,000 miles or during routine maintenance intervals. Key components to check include the shock absorbers, struts, control arms, bushings, and ball joints. Any signs of wear, such as uneven tire wear, knocking noises, or reduced handling performance, should prompt an immediate inspection.

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 340i Suspension Technical Guide

Coming Soon

A detailed guide covering the design, components, and maintenance of the BMW 340i suspension system.

Adaptive M Suspension Overview

Coming Soon

Learn about the features and benefits of the optional Adaptive M Suspension system available for the BMW 340i.

BMW Genuine Suspension Parts Catalog

Coming Soon

Access the official catalog of genuine BMW suspension parts for the 340i, including part numbers and compatibility details.

Suspension Maintenance Checklist

Coming Soon

A step-by-step checklist for inspecting and maintaining the suspension system of the BMW 340i.

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