BMW 430i 2017-present Brakes Specifications
Detailed technical specifications and service information for the 2017-Present BMW 430I braking system. Includes brake components, torque values, maintenance schedules, and diagnostic procedures.
Overview Specifications
Comprehensive description of the brakes specifications for the 2017-Present BMW 430I, including key features, measurements, and technical details
How to Use
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Navigate through the brake documentation sections using the table of contents or by scrolling through the document. Each section is clearly labeled for easy access.
Key Specifications
Front Brake Disc Diameter
340 mm
Rear Brake Disc Diameter
330 mm
Brake Fluid Capacity
1.0 liter
Brake Pad Thickness (Front)
12 mm (new), 3 mm (min)
Brake Disc Thickness (Rear)
22 mm (new), 20 mm (min)
Available Specifications
Brake System Overview
Detailed description of the brake system components and their functions
Brake System Overview
Detailed description of the brake system components and their functions
Front Brake System
- Ventilated disc brakes with a diameter of 340 mm
- Single-piston floating calipers
- Brake pad thickness: 12 mm (new), 3 mm (minimum)
- Brake disc thickness: 28 mm (new), 26 mm (minimum)
Rear Brake System
- Solid disc brakes with a diameter of 330 mm
- Single-piston floating calipers
- Brake pad thickness: 10 mm (new), 2 mm (minimum)
- Brake disc thickness: 22 mm (new), 20 mm (minimum)
Note: Ensure proper alignment and torque specifications during installation to avoid uneven wear.
Brake Fluid Specifications
Information on brake fluid types, capacities, and maintenance intervals
Brake Fluid Specifications
Information on brake fluid types, capacities, and maintenance intervals
Brake Fluid Type
- DOT 4 brake fluid recommended
- Minimum boiling point: 230°C (dry), 155°C (wet)
- Compatible with DOT 3 and DOT 4 fluids
Brake Fluid Capacity
- Total system capacity: 1.0 liter
- Fluid replacement interval: Every 2 years or 30,000 miles
- Check fluid level monthly
Brake System Maintenance
Guidelines for maintaining and inspecting the brake system
Brake System Maintenance
Guidelines for maintaining and inspecting the brake system
Inspection Intervals
- Inspect brake pads every 10,000 miles
- Check brake discs for wear and cracks every 20,000 miles
- Inspect brake lines for leaks and damage annually
Replacement Guidelines
- Replace brake pads when thickness is below 3 mm (front) or 2 mm (rear)
- Replace brake discs when thickness is below 26 mm (front) or 20 mm (rear)
- Replace brake fluid every 2 years or 30,000 miles
Note: Use only BMW-approved brake components to ensure optimal performance and safety.
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Brakes Specifications
Brake System Type
- Front Brakes
- Ventilated disc brakes
- Rear Brakes
- Solid disc brakes
- Brake Assist
- DSC (Dynamic Stability Control) with ABS
- Parking Brake
- Electromechanical parking brake
Brake Disc Specifications
- Front Disc Diameter
- 340 mm
- Front Disc Thickness
- 30 mm
- Rear Disc Diameter
- 330 mm
- Rear Disc Thickness
- 20 mm
- Material
- Cast iron with anti-corrosion coating
- Part Number Front
- 34116793871
- Part Number Rear
- 34216793872
Brake Pad Specifications
- Front Pad Thickness New
- 14 mm
- Front Pad Thickness Min
- 3 mm
- Rear Pad Thickness New
- 12 mm
- Rear Pad Thickness Min
- 2 mm
- Material
- Low-metallic compound
- Part Number Front
- 34116858963
- Part Number Rear
- 34216858964
Brake Fluid Specifications
- Type
- DOT 4 LV
- Capacity
- 1.0 liter
- Boiling Point Dry
- 260°C
- Boiling Point Wet
- 165°C
- Replacement interval
- Every 2 years or 30,000 miles
Brake Caliper Specifications
- Front Caliper Type
- Floating caliper
- Rear Caliper Type
- Fixed caliper
- Piston Diameter Front
- 57 mm
- Piston Diameter Rear
- 42 mm
- Part Number Front
- 34116793873
- Part Number Rear
- 34216793874
Brake Hose Specifications
- Material
- Reinforced rubber with steel braiding
- Length Front
- 450 mm
- Length Rear
- 500 mm
- Burst Pressure
- 200 bar
- Part Number Front
- 34316793875
- Part Number Rear
- 34416793876
Brake Pedal Specifications
- Pedal Travel
- 50-60 mm
- Pedal Force
- 30-50 N
- Pedal Height
- 150 mm
- Adjustment
- Self-adjusting
Brake Wear Sensors
- Front Sensor Part Number
- 34356793877
- Rear Sensor Part Number
- 34356793878
- Resistance New
- 0.5-1.5 ohms
- Resistance Worn
- > 10 ohms
- Replacement interval
- Replace with brake pads
Brake System Pressures
- Normal Operating Pressure
- 50-70 bar
- Maximum Pressure
- 120 bar
- Pressure Tolerance
- +/- 5 bar
Brake System Diagnostics
- Fault Codes
-
- DSC 5E20: Brake pressure sensor fault
- DSC 5E21: Brake pressure sensor plausibility
- DSC 5E22: Brake pressure sensor signal
- Diagnostic Tool
- BMW ISTA
- Test Procedures
-
- Check brake fluid level
- Inspect brake pad thickness
- Test brake pressure sensor
Service Information Service
Detailed service requirements and schedules for the brake system
- Inspect brake pad thickness
- Check brake fluid level
- Inspect brake discs for wear and damage
Replace brake fluid every 2 years or 30,000 miles
- Replace brake fluid
- Inspect brake hoses for cracks and leaks
- Check brake caliper operation
Replace brake pads if thickness is below minimum
- Replace brake pads
- Replace brake discs if necessary
- Inspect parking brake system
Perform full brake system inspection
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What type of brake system does the 2017-Present BMW 430i use?
What type of brake system does the 2017-Present BMW 430i use?
The 2017-Present BMW 430i is equipped with a dual-circuit brake system with diagonal split, featuring ventilated front disc brakes and solid rear disc brakes. The front brake discs measure 340mm in diameter, while the rear discs measure 330mm. The system includes an Anti-lock Braking System (ABS), Dynamic Stability Control (DSC), and Brake Assist.
Q2 What is the recommended brake pad replacement interval for the BMW 430i?
What is the recommended brake pad replacement interval for the BMW 430i?
The recommended brake pad replacement interval for the BMW 430i varies based on driving conditions and style. However, under normal driving conditions, brake pads typically last between 30,000 to 70,000 miles. It is crucial to monitor the brake pad wear sensor and consult the vehicle's onboard service indicator for precise replacement timing.
Q3 Can I use aftermarket brake components on my BMW 430i?
Can I use aftermarket brake components on my BMW 430i?
While aftermarket brake components may be compatible, BMW strongly recommends using genuine BMW brake parts to ensure optimal performance, safety, and compliance with warranty requirements. Genuine parts are specifically engineered for the vehicle's braking system and meet BMW's rigorous quality standards.
Q4 How do I check the brake fluid level in my BMW 430i?
How do I check the brake fluid level in my BMW 430i?
To check the brake fluid level, locate the brake fluid reservoir under the hood. The fluid level should be between the MIN and MAX marks on the reservoir. Use only BMW-approved DOT 4 brake fluid, as specified in the owner's manual. Brake fluid should be checked regularly and replaced every 2 years or as indicated by the service indicator.
Q5 What is the function of the Brake Energy Regeneration system in the BMW 430i?
What is the function of the Brake Energy Regeneration system in the BMW 430i?
The Brake Energy Regeneration system in the BMW 430i captures kinetic energy during braking and converts it into electrical energy, which is stored in the vehicle's battery. This system improves fuel efficiency and reduces the load on the engine by powering the electrical systems with the regenerated energy.
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 Brake System Overview
Coming SoonDetailed technical overview of the BMW 430i brake system, including components, specifications, and maintenance guidelines.
Brake Pad Replacement Guide
Coming SoonStep-by-step instructions for replacing brake pads on the BMW 430i, including tools required and safety precautions.
Brake Fluid Maintenance Tips
Coming SoonComprehensive guide on checking, topping up, and replacing brake fluid in the BMW 430i, including recommended fluid types and intervals.
Understanding Brake Energy Regeneration
Coming SoonExplains the technology behind BMW's Brake Energy Regeneration system and its benefits for fuel efficiency and performance.
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Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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