BMW 428i 2014-2016 Suspension Specifications
Comprehensive technical documentation for the 2014-2016 BMW 428i suspension system, including front strut assembly, rear multi-link suspension, alignment settings, torque specs, and maintenance tips.
Overview Specifications
Comprehensive description of the suspension specifications for the 2014-2016 BMW 428I, including key features, measurements, and technical details. This section provides detailed insights into the front and rear suspension systems, alignment specifications, and critical components.
How to Use
Use the search function to locate specific suspension components or specifications by entering keywords such as 'front strut', 'rear axle', or 'alignment angles'.
Navigate through the suspension documentation by selecting the relevant section from the table of contents. Each section is organized into subsections for easy access to specific details.
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
18 mm
Wheelbase
2810 mm
Available Specifications
Front Suspension
Detailed information about the front suspension system, including the strut assembly, control arms, and steering components.
Front Suspension
Detailed information about the front suspension system, including the strut assembly, control arms, and steering components.
Strut Assembly
- MacPherson strut design with coil spring and integrated shock absorber
- Strut diameter: 50 mm
- Spring rate: 28 N/mm
- Bump stop length: 60 mm
- Upper strut mount material: reinforced rubber with bearing
Control Arms and Bushings
- Lower control arm made of forged aluminum
- Bushing material: hydraulic rubber for vibration damping
- Control arm length: 320 mm
- Bushing durometer: 70 Shore A
- Anti-roll bar diameter: 24 mm
Note: Ensure proper torque specifications during installation to avoid premature bushing wear.
Rear Suspension
Technical details of the rear suspension system, including the multi-link setup, springs, and dampers.
Rear Suspension
Technical details of the rear suspension system, including the multi-link setup, springs, and dampers.
Multi-Link Setup
- Five-link independent rear suspension
- Trailing arm length: 450 mm
- Upper control arm material: forged steel
- Lower control arm material: cast aluminum
- Anti-roll bar diameter: 18 mm
Springs and Dampers
- Coil spring rate: 32 N/mm
- Shock absorber type: twin-tube gas-charged
- Spring free length: 380 mm
- Damper stroke: 120 mm
- Bump stop length: 50 mm
Note: Inspect damper seals for leaks during routine maintenance.
Alignment Specifications
Alignment angles and tolerances for the front and rear suspension systems.
Alignment Specifications
Alignment angles and tolerances for the front and rear suspension systems.
Front Alignment
- Camber angle: -0.5° to +0.5°
- Caster angle: +6.5° to +7.5°
- Toe-in: 0.10° to 0.20°
- Steering axis inclination: 12.5°
- Maximum toe-out on turns: 1.5°
Rear Alignment
- Camber angle: -1.5° to -0.5°
- Toe-in: 0.15° to 0.25°
- Thrust angle: 0° ± 0.2°
- Track width: 1570 mm
- Wheelbase: 2810 mm
Note: Ensure proper alignment to avoid uneven tire wear and handling issues.
Suspension Components
Detailed specifications for key suspension components, including bushings, mounts, and fasteners.
Suspension Components
Detailed specifications for key suspension components, including bushings, mounts, and fasteners.
Bushings and Mounts
- Front strut mount bolt torque: 50 Nm + 90°
- Rear subframe bushing durometer: 75 Shore A
- Control arm bushing preload: 2.5 mm
- Anti-roll bar link length: 150 mm
- Bushing replacement interval: 100,000 km
Fasteners and Torque Specifications
- Strut-to-knuckle bolt torque: 120 Nm + 90°
- Control arm bolt torque: 90 Nm + 45°
- Wheel hub nut torque: 180 Nm
- Anti-roll bar bracket bolt torque: 25 Nm
- Subframe mounting bolt torque: 110 Nm + 90°
Note: Use a calibrated torque wrench for all suspension fasteners to ensure proper clamping force.
Search Specifications
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Type to search through torque specifications. Results will appear below as you type.
Component Specifications
Front Suspension
- Type
- MacPherson strut
- Spring Rate
- 32 N/mm
- Shock ABSorber Type
- Gas-filled monotube
- Stabilizer Bar Diameter
- 26 mm
- Ball Joint Part Number
- 31-12-6-857-019
- Strut Mount Part Number
- 31-33-6-857-788
Rear Suspension
- Type
- Multi-link independent
- Spring Rate
- 28 N/mm
- Shock ABSorber Type
- Gas-filled twin-tube
- Stabilizer Bar Diameter
- 18 mm
- Trailing Arm Part Number
- 33-32-6-857-311
- Subframe Mount Part Number
- 33-32-6-857-312
Shock ABSorbers
- Front Shock Travel
- 150 mm
- Rear Shock Travel
- 140 mm
- Compression Damping
- 1200 N·s/m
- Rebound Damping
- 1800 N·s/m
- Manufacturer
- Sachs
- Replacement interval
- 60,000 miles
Springs
- Front Spring Length
- 320 mm
- Rear Spring Length
- 280 mm
- Front Spring Wire Diameter
- 12 mm
- Rear Spring Wire Diameter
- 10 mm
- Material
- High-tensile steel
- Coil Count
- 6
Bushings
- Front Control Arm Bushing Material
- Polyurethane
- Rear Trailing Arm Bushing Material
- Rubber
- Front Bushing Part Number
- 31-12-6-857-020
- Rear Bushing Part Number
- 33-32-6-857-313
- Replacement interval
- 100,000 miles
Alignment Specifications
- Front Camber
- -0.5° to +0.5°
- Rear Camber
- -1.5° to -0.5°
- Front Toe
- 0.08° to 0.25°
- Rear Toe
- 0.10° to 0.30°
- Caster
- 7.0° to 8.0°
Wheel Bearings
- Front Wheel Bearing Type
- Sealed unit
- Rear Wheel Bearing Type
- Sealed unit
- Front Bearing Part Number
- 31-21-6-857-021
- Rear Bearing Part Number
- 33-41-6-857-314
- Replacement interval
- 120,000 miles
Suspension Mounts
- Front Strut Mount Material
- Reinforced rubber
- Rear Shock Mount Material
- Reinforced rubber
- Front Mount Part Number
- 31-33-6-857-788
- Rear Mount Part Number
- 33-52-6-857-789
- Torque Specification
- 45 N·m
Torque Specifications
- Front Strut Mount Nut
- 60 N·m
- Rear Shock ABSorber Bolt
- 45 N·m
- Front Control Arm Bolt
- 90 N·m
- Rear Trailing Arm Bolt
- 110 N·m
Diagnostic Specifications
- Shock ABSorber Leak Test
- No visible fluid leakage
- Bushing Wear Limit
- 2 mm play
- Spring Sag Limit
- 10 mm deviation from new height
- Alignment Check interval
- 15,000 miles
Service Information Service
Detailed service requirements and schedules for the suspension system
- Inspect shock absorbers for leaks
- Check suspension bushings for wear
- Verify alignment settings
Alignment should be checked after any suspension repairs
- Replace shock absorbers
- Inspect and replace worn bushings
- Check and replace wheel bearings if necessary
Use only OEM parts for replacements
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What type of suspension system does the 2014-2016 BMW 428i use?
What type of suspension system does the 2014-2016 BMW 428i use?
The 2014-2016 BMW 428i is equipped with a double-joint spring-strut front axle and a five-link rear axle. The front suspension uses MacPherson struts with coil springs, while the rear suspension features a multi-link design for improved handling and ride comfort.
Q2 What is the recommended tire pressure for the 2014-2016 BMW 428i?
What is the recommended tire pressure for the 2014-2016 BMW 428i?
The recommended tire pressure for the 2014-2016 BMW 428i is 32 psi (2.2 bar) for the front tires and 35 psi (2.4 bar) for the rear tires under normal driving conditions. For high-speed driving or heavy loads, adjust the pressure according to the specifications in the owner's manual.
Q3 How often should the suspension components be inspected?
How often should the suspension components be inspected?
BMW recommends inspecting the suspension components every 30,000 miles or 3 years, whichever comes first. This includes checking the struts, shocks, bushings, and control arms for wear and damage. Regular inspections help maintain optimal handling and safety.
Q4 What is the ride height of the 2014-2016 BMW 428i?
What is the ride height of the 2014-2016 BMW 428i?
The ride height of the 2014-2016 BMW 428i is approximately 5.5 inches (140 mm) at the front and 5.7 inches (145 mm) at the rear. This measurement is taken from the ground to the bottom of the vehicle's chassis.
Q5 Can the suspension be upgraded to improve performance?
Can the suspension be upgraded to improve performance?
Yes, the suspension can be upgraded with performance parts such as lowering springs, adjustable coilovers, or aftermarket sway bars. However, any modifications should be performed by a qualified technician to ensure proper installation and alignment, and to avoid voiding the vehicle's warranty.
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 428i Suspension Maintenance Guide
Coming SoonA detailed guide on maintaining and servicing the suspension system of the 2014-2016 BMW 428i, including inspection intervals and common issues.
BMW Genuine Suspension Parts Catalog
Coming SoonAccess the official catalog of genuine BMW suspension parts for the 2014-2016 428i, ensuring compatibility and optimal performance.
BMW 428i Suspension Alignment Specifications
Coming SoonDetailed alignment specifications for the 2014-2016 BMW 428i, including camber, caster, and toe settings for optimal handling and tire wear.
BMW 428i Suspension Troubleshooting Guide
Coming SoonA comprehensive troubleshooting guide for diagnosing common suspension issues in the 2014-2016 BMW 428i, such as noise, vibration, and uneven tire wear.
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Technical Information
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