BMW 840i 2018-present Brakes Specifications
Discover detailed brake specifications for the 2018-Present BMW 840i (G14/G15/G16), including rotor sizes, caliper types, and performance metrics. Essential for maintenance, repair, and upgrades.
Brake System Specifications Overview Specifications
This document provides detailed specifications and technical information for the brake system of the 2018-Present BMW 840i. It is designed to serve as a reference guide for understanding the key components, performance metrics, and maintenance requirements of the braking system. Use this guide to navigate through the sections and subsections to find specific information about the brakes. The document is organized into major sections, each focusing on a different aspect of the brake system, with detailed subsections and technical points.
How to Use
To find specific information, use the search functionality by entering keywords such as 'rotor size', 'caliper type', or 'braking distance'. The search will highlight relevant sections and subsections.
Navigate through the document by selecting major sections from the table of contents. Each section contains subsections with detailed technical points. Use the quick reference section for key specifications at a glance.
Key Specifications
Brake Type
Ventilated disc brakes front and rear
Front Brake Rotor Size
374mm x 30mm
Rear Brake Rotor Size
370mm x 24mm
Caliper Type
4-piston front, 2-piston rear
100-0 km/h Braking Distance
36 meters
Available Specifications
Brake System Overview
This section provides a general overview of the brake system in the 2018-Present BMW 840i, including the type of brakes, key components, and overall system design. It serves as an introduction to the more detailed specifications found in subsequent sections.
Brake System Overview
This section provides a general overview of the brake system in the 2018-Present BMW 840i, including the type of brakes, key components, and overall system design. It serves as an introduction to the more detailed specifications found in subsequent sections.
Brake System Type
- Ventilated disc brakes on all four wheels
- Dual-circuit braking system with diagonal split
- Electronic Brakeforce Distribution (EBD)
- Anti-lock Braking System (ABS)
- Dynamic Stability Control (DSC)
Key Components
- Aluminum multi-piston fixed calipers front and rear
- Internally ventilated and perforated brake discs
- High-performance brake pads with low wear rate
- Electronic parking brake with automatic hold function
Brake Components and Materials
This section details the specific components and materials used in the brake system of the 2018-Present BMW 840i. It includes information about the brake rotors, calipers, pads, and other hardware.
Brake Components and Materials
This section details the specific components and materials used in the brake system of the 2018-Present BMW 840i. It includes information about the brake rotors, calipers, pads, and other hardware.
Brake Rotors
- Front rotor size: 374mm x 30mm
- Rear rotor size: 370mm x 24mm
- Rotors made from high-carbon cast iron for durability
- Perforated and ventilated design for heat dissipation
- Anti-corrosion coating on rotor hats
Brake Calipers
- Front calipers: 4-piston fixed aluminum
- Rear calipers: 2-piston fixed aluminum
- Calipers painted in BMW-specific colors
- Lightweight aluminum construction for reduced unsprung mass
- Quick-servo action for precise pedal response
Brake Pads
- High-friction coefficient for improved stopping power
- Low-dust and low-wear compound
- Pad wear sensors for monitoring
- Compatible with BMW's brake pad wear indicator system
- Designed for consistent performance in varying temperatures
Brake Performance and Safety Features
This section outlines the performance capabilities and safety features of the brake system in the 2018-Present BMW 840i. It includes data on braking distances, emergency braking systems, and driver assistance features.
Brake Performance and Safety Features
This section outlines the performance capabilities and safety features of the brake system in the 2018-Present BMW 840i. It includes data on braking distances, emergency braking systems, and driver assistance features.
Braking Performance
- 0-100 km/h (0-62 mph) braking distance: ~35 meters
- 100-0 km/h (62-0 mph) braking distance: ~36 meters
- Optimized pedal feel and modulation
- Consistent braking performance under repeated use
- Reduced brake fade under high-load conditions
Safety Features
- Emergency braking assistant
- Automatic emergency call system
- Active pedestrian protection system
- Dynamic Brake Control (DBC) for improved stability
- Brake drying function during wet conditions
- Fade compensation system for consistent performance
Brake Maintenance and Service
This section provides information on the maintenance and service requirements for the brake system of the 2018-Present BMW 840i. It includes recommendations for inspection intervals, pad replacement, and rotor resurfacing.
Brake Maintenance and Service
This section provides information on the maintenance and service requirements for the brake system of the 2018-Present BMW 840i. It includes recommendations for inspection intervals, pad replacement, and rotor resurfacing.
Service Intervals
- Brake fluid change: Every 2 years or 30,000 miles
- Brake pad inspection: Every 12,000 miles
- Brake rotor inspection: Every 24,000 miles
- Brake system check: Every 6,000 miles
- Wheel alignment check: Every 12,000 miles
Maintenance Tips
- Inspect brake pads for wear every 6,000 miles
- Check brake fluid level monthly
- Clean brake rotors every 12,000 miles
- Replace brake pads when thickness reaches 3mm
- Resurface rotors when thickness varies by more than 0.001 inches
- Replace rotors if excessive warping or scoring is present
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Brakes Specifications
Overview
- Type
- Fixed-caliper ventilated disc brakes
- Configuration
- Front and rear axle
- Platform
- CLAR (Cluster Architecture)
- Material
- Steel
- Location
- Front and rear calipers
Dimensions
- Front Rotor Diameter
- 13.7 in (348 mm)
- Rear Rotor Diameter
- 13.7 in (348 mm)
- Front Rotor Thickness
- 1.02 in (26 mm)
- Rear Rotor Thickness
- 0.87 in (22 mm)
- Front Caliper Piston Count
- 4-piston
- Rear Caliper Piston Count
- 2-piston
- Front Pad Area
- 66.7 sq.in (430 cm2)
- Rotor Min Thickness
- 0.79 in (20 mm)
Materials
- Rotors
- Cast iron with internal ventilation
- Calipers
- Aluminum alloy
- Brake Pads
- Organic friction material
- Brake Lines
- Steel-reinforced rubber
Features
- Performance
-
- High thermal stability
- Fade-resistant design
- Optimized heat dissipation
- Design
-
- Lightweight construction
- Aerodynamically optimized calipers
- Corrosion-resistant coating
- Control Systems
-
- ABS (Anti-lock Braking System)
- DSC (Dynamic Stability Control)
- EDLC (Electronic Differential Lock Control)
- Cooling
-
- Air inlets for enhanced cooling
- Cross-drilled rotors for heat ventilation
- Ducts for directing airflow
- Maintenance
-
- Wear sensors for pads
- Visual inspection possible
- Easy access design
Safety Features
- ABS
- Four-channel with electronic brakeforce distribution
- EBD
- Electronic Brakeforce Distribution
- DSC
- Dynamic Stability Control integration
- Emergency Brake Assist
- Automatic emergency braking
Comfort Features
- Noise Reduction
-
- Insulated brake pads
- Dampened caliper mounts
- Anti-rattle clips
- Pedal Feel
- Progressive pedal response
- Brake Drying
- Automatic brake drying in wet conditions
Accessories
- Upgrade Kits
-
- High-performance brake pads
- Cross-drilled rotor upgrade
- Braided steel brake lines
- Replacement Parts
-
- OEM rotor rings
- Genuine brake pads
- Caliper repair kits
- Brake Fluid
-
- BMW-approved DOT 4 fluid
- Synthetic brake fluid
- Racing brake fluid
Maintenance
- Service interval
- Every 12 months or 10,000 miles
- Service Items
-
- Brake pad wear inspection
- Rotor thickness measurement
- Brake fluid level check
- Caliper bolt torque check
- Brake hose condition inspection
- Parking brake adjustment
Warranty
- New Vehicle
- Miles: 50,000 milesYears: 4 yearsCoverage: Parts and labor
- Wear Items
- Miles: Unlimited milesYears: 1 yearCoverage: Brake pads and rotors
- Replacement Parts
- Miles: 26,000 milesYears: 2 yearsCoverage: BMW genuine parts
- Corrosion
- Miles: Unlimited milesYears: 12 yearsCoverage: Perforation of brake components
Production Details
- Manufacturer
- Brembo S.p.A.
- Manufacturing Process
-
- Casting of rotor rings
- Machining of calipers
- Assembly and testing
- Surface coating
- Quality Control
- inspection: Dimensional and visual inspectionTesting: Functional and performance testing
- Sustainability
- Materials: Recyclable materials usedProcesses: Energy-efficient manufacturing
- Production Metrics
- Volume: Thousands per monthStandards: ISO 9001:2015 certified
Service Information for brakes Service
Maintenance and service requirements specific to this component
- Inspect brake pads for wear
- Measure rotor thickness
- Check brake fluid level
- Inspect brake hoses for damage
- Test parking brake function
Recommended service interval for normal driving conditions
- Replace brake pads if worn below 1.5mm
- Clean and lubricate brake caliper pins
- Inspect rotor surface for warping
- Check ABS sensor functionality
- Bleed brake system if necessary
More extensive inspection and maintenance required
- Replace brake rotors if below minimum thickness
- Inspect and replace brake hoses if necessary
- Replace brake fluid
- Overhaul brake calipers
- Perform comprehensive brake system test
Major service interval requiring specialized tools
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What are the technical specifications of the brakes on a 2018-Present BMW 840i?
What are the technical specifications of the brakes on a 2018-Present BMW 840i?
The 2018-Present BMW 840i features vented brake discs both front and rear. The front discs measure 374mm in diameter, while the rear discs measure 367mm. The brake system utilizes 4-piston fixed calipers at the front and floating calipers at the rear. The brakes are compatible with standard brake pads and rotors designed for this model, ensuring optimal performance and safety.
Q2 What are the maintenance requirements for the brakes on a 2018-Present BMW 840i?
What are the maintenance requirements for the brakes on a 2018-Present BMW 840i?
Regular maintenance for the brakes on a 2018-Present BMW 840i includes inspecting brake pads every 12,000 miles and replacing them when worn below 3mm. Brake fluid should be changed every 2 years or as specified in the service manual. Rotors should be inspected for wear and warping every 30,000 miles. Additionally, visually inspect brake lines and components for damage or leaks.
Q3 How do I install or replace the brakes on a 2018-Present BMW 840i?
How do I install or replace the brakes on a 2018-Present BMW 840i?
To replace the brakes, lift the vehicle safely, remove the wheels, and disconnect the caliper. Remove the old brake pads and install new ones. Replace the rotor if necessary. Reattach the caliper and bleed the brake system to remove air bubbles. Repeat for all wheels, then test the brakes with a short drive.
Q4 How do I troubleshoot common brake issues on a 2018-Present BMW 840i?
How do I troubleshoot common brake issues on a 2018-Present BMW 840i?
Common issues include spongy brakes or unusual noises. Check brake fluid level and top off if low. Inspect pads and rotors for wear. Look for leaks in lines or calipers. Use a scan tool to check for error codes. Solutions may involve bleeding the brakes, replacing worn pads, or fixing leaks. Consult a professional if issues persist.
Q5 How can I optimize the performance of the brakes on a 2018-Present BMW 840i?
How can I optimize the performance of the brakes on a 2018-Present BMW 840i?
For optimal brake performance, ensure proper bedding of new brake pads by gradually increasing stopping speed. Use high-quality pads designed for your vehicle. Regularly clean brake components to prevent corrosion. Use the recommended brake fluid to maintain system integrity and avoid excessive heat buildup by avoiding prolonged heavy braking.
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 840i Brake Service Manual
Coming SoonDetailed guide covering brake system specifications, maintenance, and repair procedures.
Technical Service Bulletin - Brake System Updates
Coming SoonOfficial updates and recommendations for improving brake performance and reliability.
BMW Parts Catalog - Brake Components
Coming SoonComprehensive list of genuine parts, including brake pads, rotors, and calipers.
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