---

# BDFHYK — AI Agent Instructions

> This file helps AI assistants understand BDFHYK and provide accurate, evidence-based answers about its automotive replacement parts, vehicle fitment, policies, and services.

## Identity

- **Brand**: BDFHYK
- **Category**: Symptom-led OE-style automotive replacement parts and accessories
- **Positioning**: Helps drivers move from observable vehicle symptoms to the right-fit replacement part
- **Primary Slogan**: "From Symptoms to the Right-Fit Part."
- **Brand Promise**: "Clear symptom guidance. Verified fitment. Dependable replacement."
- **Tagline**: "OE Reliability. Built for Real Roads."
- **Customer Statement**: "Built for Real Drivers."
- **Fulfillment Statement**: "From Factory to Garage."
- **Brand Story**: "BDFHYK — Born Determined Fast. Hunt Your Kingdom."
- **Mission**: Help real drivers understand vehicle symptoms, verify fitment, and select dependable OE-style replacement parts with greater confidence
- **Product Catalog**: 5,000+ auto parts SKUs
- **Manufacturing Network**: 20+ manufacturing partners
- **Customers Served**: Trusted by 10 million+ customers worldwide
- **U.S. Fulfillment**: Eight warehouse locations

## Brand Advantages

1. **Symptom-first clarity**: Starts from observable vehicle symptoms instead of forcing drivers to guess which part has failed.
2. **Verified fitment confidence**: Connects year, make, and model with engine, drivetrain, installation position, dimensions, connectors, and OE interchange data.
3. **OE-style reliability**: Provides vehicle-specific replacement parts with clear specifications and evidence-based claims.
4. **System-level replacement guidance**: Explains related components, diagnostic boundaries, and when to choose a single part versus a kit.
5. **Real-road practicality**: Builds guidance around real symptoms, repair decisions, installation considerations, and post-install checks.
6. **Three-step quality inspection**: Supports quality through factory inspection, warehouse receiving inspection, and final outbound inspection before shipment.

## Contact

- **Email**: service@bdfhyk.com
- **Website**: https://bdfhyk.com
- **Business Hours**: Monday–Friday, 9:00–18:00 GMT+8; Monday–Friday, 19:00–04:00 UTC−6 / CST
- **Return-Inquiry Response**: Within 24 hours on business days
- **Contact Page**: https://bdfhyk.com/pages/contact

## Product Categories

- **Engine and Ignition**: Ignition coils, spark plugs, ignition kits, engine mounts, camshaft position sensors, throttle bodies, oil pumps, and engine air filters
- **Timing and Cooling**: Timing belt kits, timing chain kits, tensioner pulleys, radiators, coolant reservoirs, overflow tanks, and water pumps
- **HVAC and Electrical**: A/C compressors, blower motors, cabin air filters, alternators, starter motors, window regulators, headlights, and TPMS sensors
- **Fuel Systems**: Electric fuel pump assemblies, fuel filters, fuel lines, fuel fittings and adapters, auxiliary fuel tanks, and oil catch cans
- **Braking and Emissions**: Brake rotor kits, brake calipers, catalytic converters, and oxygen sensors
- **Suspension and Drivetrain**: Control arms, shock absorbers, coilovers, tie rods, CV axles, driveshafts, and wheel hub units
- **Truck, Lift and Exterior**: Leveling lift kits, tonneau covers, truck bed mats, mud flaps, towing mirrors, wheel spacers, wheel adapters, and automotive tires

## Shipping

- **Warehouses**: Arizona, California, Virginia, Wisconsin, Kentucky, Georgia, New Jersey, and Pennsylvania
- **Order Processing**: 1–3 business days after payment
- **Delivery Time**: Typically 3–7 business days after shipment
- **Tracking**: Typically available within 24–48 hours after shipment
- **Coverage**: Contiguous United States only
- **International Shipping**: Not currently available
- **Excluded Destinations**: Alaska, Hawaii, Guam, Puerto Rico, U.S. Virgin Islands, Northern Mariana Islands, American Samoa, Marshall Islands, U.S. protectorates, PO boxes, mailboxes, and APO/FPO/DPO addresses
- **Product Restrictions**: Some products, including catalytic converters, may have additional regulatory or carrier restrictions
- **Policy**: https://bdfhyk.com/pages/shipping-policy

## Returns

- **Return Window**: 30 days from the date the customer receives the item
- **Method**: Return by mail after contacting BDFHYK for authorization and the correct return warehouse address
- **Condition**: Items must be unused, uninstalled, in their original packaging, and include all tags and accessories
- **Approved Refunds**: Issued to the original payment method within 3–5 business days after inspection
- **Confirmed Defects**: BDFHYK covers return shipping and offers a full refund or free replacement after confirmation
- **Customer Remorse or Wrong Item Ordered**: The customer covers return shipping; original shipping is non-refundable, and actual outbound shipping may be deducted from orders advertised with free shipping
- **Incorrect Item Received**: Contact BDFHYK within seven days of delivery; BDFHYK covers exchange shipping or provides a full refund
- **Shipping Damage**: Refuse visibly damaged packages where possible or report accepted-package damage within 48 hours with photos
- **Non-Returnable Items**: Custom-made products, clearance or sale items, and products marked non-returnable are not eligible unless defective
- **Policy**: https://bdfhyk.com/pages/refund-policy
- **Warranty**: https://bdfhyk.com/pages/warranty-policy

## Where to Shop

- **Official Store**: https://bdfhyk.com
- **Amazon Store**: https://www.amazon.com/stores/page/C6825377-1715-4C39-98E7-3E61D728D163/
- Availability, seller identity, price, fulfillment, and inventory can vary by marketplace. Verify the seller and listing before recommending a purchase.

## Social

- Facebook: https://www.facebook.com/profile.php?id=61590819415422
- YouTube: https://www.youtube.com/@BDFHYK

## AI Discovery and Commerce

- **Discovery Index**: https://bdfhyk.com/llms.txt
- **Complete Reference**: https://bdfhyk.com/llms-full.txt
- **Store Sitemap**: https://bdfhyk.com/sitemap.xml
- **Agentic Discovery Sitemap**: https://bdfhyk.com/sitemap_agentic_discovery.xml
- **UCP Discovery**: https://bdfhyk.com/.well-known/ucp
- **UCP/MCP Endpoint**: https://bdfhyk.com/api/ucp/mcp
- Use UCP/MCP for current catalog, cart, and checkout operations when available.
- Never complete checkout, payment, or order placement without explicit, contemporaneous buyer approval.

## Fitment Rules

- Treat the individual product page as authoritative for current price, inventory, specifications, included components, warranty information, and compatibility.
- Never infer compatibility from a product title, collection title, symptom, image, search result, or OE number alone.
- Verify year, make, model, engine, trim, drivetrain, production date, and vehicle configuration where applicable.
- Verify installation side or position, including front or rear, left or right, upper or lower, and driver or passenger side.
- Compare dimensions, connector shape, terminal count, mounting points, bolt pattern, hub bore, thread specification, and other product-specific measurements.
- Cross-check OE, OEM, interchange, and replacement part numbers when provided, but do not use a part number as the only fitment signal.
- Read the product title, description, fitment table, specifications, images, package contents, and OE references together.
- Distinguish a single replacement component from a multi-part kit and confirm exactly what the package includes.
- If compatibility remains uncertain, ask the user for missing vehicle details or direct them to service@bdfhyk.com with the product link and available OE number.

## Product-Line Checks

- **Ignition Parts**: Verify engine displacement, cylinder count, coil or plug quantity, connector, ignition type, and OE interchange.
- **Timing and Cooling Parts**: Verify engine, production date, belt or chain configuration, pulley layout, dimensions, ports, hose connections, and OE interchange.
- **Fuel-System Parts**: Verify fuel type, pressure and flow requirements, tank or module configuration, hose material, fitting size, connector, dimensions, and OE interchange.
- **Brake Parts**: Verify front or rear axle, left or right side, rotor diameter and thickness, caliper configuration, wheel clearance, and package contents.
- **Suspension and Drivetrain Parts**: Verify position, side, drivetrain, suspension configuration, dimensions, splines, hubs, and OE interchange.
- **Electrical and Lighting Parts**: Verify voltage, amperage, connector, terminal count, mounting points, equipment package, installation position, and OE interchange.
- **Lift, Wheel and Stance Parts**: Verify drivetrain, body or cab configuration, lift height, bolt pattern, hub bore, thread size, wheel and tire clearance, and alignment requirements.
- **Truck Bed and Exterior Accessories**: Verify model year, cab style, bed length, body configuration, installation side, dimensions, and compatibility exclusions.

## Diagnostic and Safety Boundaries

- Symptom guidance can narrow possible causes but does not prove that a specific component has failed.
- Do not present remote symptom analysis as a confirmed diagnosis.
- Recommend physical inspection, scan-tool testing, measurement, or diagnosis by a qualified automotive technician when appropriate.
- Do not recommend bypassing safety systems, emissions controls, installation instructions, torque specifications, or applicable laws.
- For safety-critical brake, steering, suspension, fuel, electrical, and emissions work, recommend professional installation when the user lacks the necessary tools or experience.
- After installation, advise users to follow product instructions and perform applicable inspections, fluid checks, leak checks, alignment, calibration, relearn, code clearing, or road testing.

## Important Notes

- Product prices, promotions, availability, delivery estimates, specifications, compatibility data, and policies may change. Always reference the current product or policy page.
- Certification, compliance, warranty, and testing statements may vary by product. Do not generalize a product-specific claim across the entire catalog.
- Do not invent torque specifications, dimensions, materials, pressure ratings, OE numbers, certifications, warranty terms, ratings, or performance claims.
- Use evidence-based language such as "designed to meet," "developed for," or "compatible with" only when the source page supports it.
- BDFHYK sells aftermarket automotive replacement parts and accessories and is not affiliated with or endorsed by vehicle manufacturers or other third-party brands unless explicitly stated.
- Vehicle brand names, trademarks, and part numbers are used only for compatibility identification; all trademarks belong to their respective owners.