Chapter 87 covers 'Vehicles other than railway or tramway rolling-stock, and parts and accessories thereof' in the Harmonized System. This chapter includes motor vehicles (such as cars, trucks, motorcycles), non-motor vehicles (such as bicycles, horse-drawn carriages), and parts and accessories specially designed or principally designed for these vehicles. However, note that certain parts, if they are general-purpose goods belonging to other chapters (such as Chapter 40 rubber, Chapter 73 iron and steel articles), may not be classified in this chapter. The classification of parts in this chapter follows the 'specially designed or principally designed' principle, and consideration must be given to whether they constitute the characteristics of a complete vehicle. Heading 8708 covers 'Parts and accessories of the motor vehicles of headings 8701 to 8705'. Specifically includes: braking systems, transmissions, drive axles, wheels, suspension systems, steering systems, body parts, etc. However, the following are excluded: ① general-purpose parts (such as bolts, nuts); ② machine parts of Chapter 84; ③ electrical parts of Chapter 85 (such as batteries, generators). This heading is further divided into subheadings by part type, such as 8708.10 (bumpers), 8708.30 (brakes and parts thereof), etc. Code 870835 is a 6-digit HS code: the first 2 digits '87' represent Chapter 87 (Vehicles and parts and accessories thereof); digits 3-4 '08' represent heading 8708 (Parts and accessories of motor vehicles); digits 5-6 '35' represent subheading 8708.35, specifically 'Brake master cylinder'. In HS classification, subheading levels are usually divided by part function or installation position. 8708.35 is a subdivision under 8708.30 (Brakes and parts thereof), specifically for brake master cylinders that convert the driver's pedal force into hydraulic pressure. Note that 8708.35 is a 6-digit subheading, which may be further subdivided into 8 or 10 digits in some countries' tariff schedules. The brake master cylinder is a core component of the hydraulic brake system, specially designed for motor vehicles, and therefore classified in Chapter 87. It is not a general-purpose hydraulic pump (Chapter 84), because its design and structure are specifically for vehicle brake systems, and it typically features vehicle-specific characteristics such as a reservoir, piston, and valves. At the same time, it is not classified under other brake parts of 8708.30, because 8708.35 explicitly names 'Brake master cylinder' separately. If it is a pneumatic brake master cylinder, it may be classified under 8708.30 or other subheadings, but a hydraulic brake master cylinder should be classified under 8708.35.

Product Name: The standard name of the declared commodity should use 'Brake master cylinder' or 'Hydraulic brake master cylinder', avoiding colloquial terms such as 'brake master pump'. Brand: Fill in the manufacturer or brand name, such as 'Bosch', 'Continental', etc. If no brand, fill in 'No brand'. Model: Fill in the product model or part number, such as 'MC-1234', used to distinguish different specifications. Applicable Vehicle Model: Indicate the vehicle type and specific model to which the master cylinder applies, such as 'Suitable for Toyota Corolla 1.8L 2015'. Working Principle: Indicate whether it is hydraulic or pneumatic, such as 'Hydraulic brake, pushes brake fluid through piston' Material: Main materials, such as 'cast iron housing, aluminum alloy piston, rubber seals'. With or Without Reservoir: Indicate whether a brake fluid reservoir is attached, such as 'with reservoir' or 'without'. HS Code: Fill in the declared HS code, such as '87083500' (8-digit) or '8708350000' (10-digit). Product Name: Brake master cylinder Brand: Bosch Model: MC-1234 Applicable Vehicle Model: Suitable for Toyota Corolla 1.8L 2015 Working Principle: Hydraulic Material: Cast iron housing, aluminum alloy piston With or Without Reservoir: With reservoir HS Code: 87083500 Declaration Elements: 1. Product Name: Brake master cylinder; 2. Brand: Bosch; 3. Model: MC-1234; 4. Applicable Vehicle Model: Toyota Corolla 1.8L 2015; 5. Working Principle: Hydraulic; 6. Material: Cast iron housing, aluminum alloy piston; 7. With or Without Reservoir: With reservoir; 8. HS Code: 87083500 Mistakenly classifying the brake master cylinder under 87083000 (brakes and parts thereof), ignoring the separate listing of 87083500. Not indicating the working principle, leading to confusion with pneumatic brake master cylinders, which may be classified under other subheadings. Brand and model filled in falsely or inconsistently with the actual product, which may trigger customs questioning or penalties.

Core classification criteria: ① The commodity must be a brake master cylinder for motor vehicles, i.e., the master cylinder of a hydraulic brake system; ② It must be specially designed or principally designed for vehicles of Chapter 87; ③ It must be distinguished from general-purpose hydraulic pumps (Chapter 84); brake master cylinders typically have vehicle-specific interfaces, reservoirs, push rods, etc.; ④ It must be distinguished from other brake parts; 87083500 explicitly names 'Brake master cylinder', which takes precedence over 87083000. If it is a pneumatic brake master cylinder, it may be classified under 87083000 or other subheadings, but a hydraulic brake master cylinder should be classified under 87083500. 870830 Brakes and parts thereof: 870830 covers brakes, boosters, brake calipers, brake shoes, etc., but does not include brake master cylinders. Brake master cylinders have a separate subheading 870835, so they cannot be classified under 870830. 841320 Hand pumps: 841320 is for hand pumps, not limited to vehicle use, and has no vehicle-specific characteristics. Although the brake master cylinder is manually driven, it is specially designed for vehicles, so it is classified in Chapter 87. 841350 Other reciprocating positive displacement pumps: 841350 is for general-purpose reciprocating pumps, while the brake master cylinder is vehicle-specific and typically integrates a reservoir, valves, etc., so it is not classified in Chapter 84. 870839 Other brake parts: 870839 is for other brake parts, but the brake master cylinder is already separately named, so it should be classified under 870835 with priority. 870899 Other vehicle parts: 870899 is for other vehicle parts not elsewhere specified or included. The brake master cylinder is already named, so it is not classified under this code. Is it specially designed for motor vehicles? Is it a hydraulic brake master cylinder? Does it have a reservoir or vehicle-specific interfaces? Is it separately named under 870835? Is it confused with general-purpose pumps or brake parts?

The HS code for brake master cylinder is 870835, but why can't I find the 8-digit or 10-digit code in the customs tariff? 870835 is a 6-digit HS code used uniformly by the World Customs Organization. Countries refine it on this basis, such as China's 87083500 (8-digit) and the US's 8708350000 (10-digit). Please consult the destination country's customs tariff for the specific number of digits. How to distinguish a brake master cylinder from a brake wheel cylinder? A brake master cylinder converts pedal force into hydraulic pressure and is usually installed in the engine compartment or near the pedal; a brake wheel cylinder converts hydraulic pressure into mechanical force to push the brake shoes and is installed at the wheel. The two have different functions and positions, and different HS codes. Wheel cylinders are usually classified under 870830. If the brake master cylinder does not have a reservoir, is it still classified under 870835? Yes, a brake master cylinder without a reservoir is still classified under 870835, but it must be indicated as 'without reservoir' during declaration. If it is a pump for other purposes, it may be classified in Chapter 84. Which code should an electric brake master cylinder (such as electro-hydraulic brake) be classified under? If the electric brake master cylinder is still the master cylinder of a hydraulic brake system and is specially designed for vehicles, it is usually still classified under 870835. However, if it includes a motor, control unit, etc., it may be regarded as a brake system assembly, and classification should be determined based on function. It is recommended to consult customs. In the declaration elements of a brake master cylinder, must the 'Applicable Vehicle Model' be specific to the model? Yes, it is best to specify the vehicle model and year to prove that it is specially designed for motor vehicles. If only 'for automobile use' is filled in, supplementary explanation may be required, and it may even affect classification. What documents are required to export brake master cylinders from China? Usually, a customs declaration form, invoice, packing list, contract, and possibly an export license (if involved) are required. If it is a branded product, a brand authorization letter is required. Specific requirements are subject to customs. If the brake master cylinder is for motorcycles, is the HS code the same? Brake master cylinders for motorcycles should be classified under 870839 (motorcycle parts) or 871410 (motorcycle parts), not 870835, because 870835 is specifically for motor vehicles of 8701-8705, and motorcycles belong to 8711. How to check the import tariff rate for brake master cylinders? Tariff rates change. It is recommended to check the destination country's customs official website or use official tariff inquiry tools. For example, China can check the 'Customs Import and Export Tariff of the People's Republic of China', and the US can check HTSUS. You can also consult a professional customs broker.