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At Keychain Venture Co., Ltd. , we believe your vehicle should be as unique as your mission. That's why we offer full customization to meet your exact specifications—from layout and seating to technology and branding. But our commitment doesn't end with delivery. We pride ourselves on maintaining every bus in our fleet to the highest standard. Through meticulous servicing and rigorous checks, we ensure that each vehicle is not just custom-built, but also exceptionally reliable, safe, and ready for the road ahead.

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Professional Auto Parts Supplier – Advanced Manufacturing for Engine and Wheel Solutions

As a professional Auto Parts supplier, we understand that customers today are not only looking for affordable spare parts but also long-lasting reliability, precision manufacturing, and comprehensive support. Since our establishment, we have specialized in providing high-performance components such as the Weichai WP10H Engine and Bus Wagon Wheel Covers, both produced under strict quality control systems.

What makes us different from many other Auto Parts suppliers is our complete in-house production capability. From raw material processing to CNC machining, welding, polishing, assembly, and quality inspection, most procedures are performed within our own facilities. This ensures that our clients receive products with consistent quality and performance that meets international certifications such as CE, ISO9001, and GCC.

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Weichai WP10H Engine – Manufactured with Precision

The Weichai WP10H Engine is one of the most advanced diesel engines in its class. As a top Auto Parts supplier, we put significant investment into advanced production technology to ensure every engine meets the high demands of commercial vehicles.

Engine Production Process:

Casting and Forging: Engine blocks and critical components are cast with precision molds and treated with high-strength alloys for durability.

CNC Machining: Key parts such as crankshafts, pistons, and cylinder heads are processed with high-precision CNC machines to maintain dimensional accuracy.

Assembly Line: Semi-automated assembly lines ensure consistent fitting of parts, reducing human error and ensuring repeatable quality.

Performance Testing: Every WP10H Engine undergoes a complete power test, emission test, and durability test before leaving the factory.

Final Inspection: Our QC department performs multi-point checks covering torque, vibration, noise, and thermal balance.

As an experienced Auto Parts supplier, we know that reliability in engines is achieved only through strict process control. This is why our WP10H engines are trusted by transport fleets, construction firms, and public service providers worldwide.

Weichai WP10H Engine


Bus Wagon Wheel Cover – Stainless Steel Excellence

Unlike many competitors, we emphasize stainless steel wheel covers because they offer better corrosion resistance and strength compared to conventional alloys. As a professional Auto Parts supplier, we manage the entire production cycle of wheel covers to ensure maximum durability.

Wheel Cover Production Steps:

Raw Material Cutting: High-grade stainless steel sheets are selected and cut to required dimensions.

Stamping & Forming: Hydraulic presses shape the covers into precise designs while maintaining structural integrity.

Welding & Polishing: Edges are welded seamlessly and polished to create a smooth, attractive finish.

Surface Treatment: Anti-fingerprint and anti-rust coatings are applied to withstand harsh environments.

Final Fitting Tests: Each wheel cover is mounted on a test rig to confirm dimensional accuracy and secure fitting.

By controlling every stage of production, we ensure that our stainless steel wheel covers stand out in quality, making us a preferred Auto Parts supplier for fleet operators and distributors.

Bus Wagon Wheel Cover


Applications of Our Auto Parts – Built for Real-World Demands

As a reliable Auto Parts supplier, we know that every component must perform under challenging conditions. Our products are widely used in:

Public Transport Fleets: WP10H engines power buses across cities, while stainless steel wheel covers ensure durability and professional aesthetics.

Heavy-Duty Trucks: Engines provide strong torque for mining, construction, and long-haul logistics.

Special Purpose Vehicles: Fire trucks, sanitation vehicles, and emergency service vehicles rely on durable parts for uninterrupted operation.

Aftermarket Sales: Spare parts supplied globally to workshops and distributors who demand consistent quality.

These practical applications prove that working with a trusted Auto Parts supplier gives customers peace of mind when operating in demanding environments.


OEM and Customization Services – Tailored by a Professional Auto Parts Supplier

Every market has unique demands. As a leading Auto Parts supplier, we provide full OEM/ODM customization services to help clients differentiate their products.

Engine Customization: Adjusting emission standards, fuel compatibility, or power output according to regional requirements.

Wheel Cover Branding: Embossing company logos, adjusting sizes, and offering different finishes like polished, brushed, or chrome-plated.

Material Alternatives: Stainless steel for durability, or hybrid materials for cost-sensitive markets.

Packaging & Branding: OEM packaging that enhances product identity for distributors and resellers.

Our customization service is one of the reasons why global clients choose us as their trusted Auto Parts supplier.


Production Advantages – Why Choose Our Manufacturing Facilities

Unlike smaller Auto Parts suppliers who rely on outsourcing, we operate advanced in-house facilities:

Robotic Welding Systems: Guarantee uniform weld strength for engine and wheel parts.

Automated Assembly Lines: Increase efficiency and reduce human error.

Dynamic Balancing Equipment: Ensures engine crankshafts run smoothly at high RPM.

Salt Spray Testing Labs: Confirm corrosion resistance of stainless steel wheel covers.

ISO-Certified QC Procedures: Every part undergoes multi-stage inspection before shipping.

These production advantages ensure that when you choose us as your Auto Parts supplier, you receive products that are consistent, safe, and built for global markets.

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Maintenance and After-Sales Support

We don’t stop at manufacturing. As a customer-focused Auto Parts supplier, we provide a complete after-sales service system.

For Weichai WP10H Engines:

Use certified lubricants and filters.

Conduct oil checks every 5,000 km.

Replace air filters regularly in dusty environments.

Schedule routine inspections for injector systems.

For Stainless Steel Wheel Covers:

Inspect fastening clips during tire changes.

Clean with mild detergents, avoid abrasive chemicals.

Check periodically for dents or scratches.

With technical manuals, online support, and global spare parts supply, we stand by our role as a responsible Auto Parts supplier.


FAQ – Answering Customer Concerns

Q1: What makes your company a reliable Auto Parts supplier?

A: Unlike others, we manage full in-house production and strict QC testing, ensuring consistent quality and global certifications.

Q2: Do you provide international certification for engines?

A: Yes, the Weichai WP10H Engine meets Euro VI, CE, and GCC standards, making it suitable for export to regulated markets.

Q3: Can you customize wheel covers for specific bus models?

A: Absolutely. As an experienced Auto Parts supplier, we offer customized sizes, finishes, and branding solutions.

Q4: What is the advantage of stainless steel wheel covers?

A: They resist rust, are impact-resistant, and provide a premium aesthetic, making them superior to plastic or alloy covers.

Q5: Do you provide spare parts and training support?

A: Yes, we supply spare parts globally and offer technical training for customers and distributors.


Why Choose Us as Your Auto Parts Supplier

Full Production Control: From raw materials to finished products.

Certified Quality: CE, GCC, ISO standards compliance.

OEM Flexibility: Customization for engines and wheel covers.

Strong After-Sales: Technical support, warranty, and spare parts supply.

Global Experience: Exporting to over 20 countries with proven results.

Partnering with us as your Auto Parts supplier means working with a manufacturer that understands both production quality and customer needs.


In today’s competitive market, choosing the right Auto Parts supplier is critical for long-term success. With our advanced production facilities, flagship products like the Weichai WP10H Engine and stainless steel Bus Wagon Wheel Covers, and our focus on OEM services and after-sales support, we deliver far more than just parts—we deliver confidence.

Work with us today – your trusted Auto Parts supplier from China – and let’s build efficient, reliable, and profitable solutions together.

Awards and Honors
Over the years, Keychain Venture CO.,LTD has been recognized for its excellence and innovation in the industry. Our commitment to quality and customer satisfaction has earned us numerous awards. Through various awards and accolades, we have demonstrated our presence in the international market and our commitment to providing high-quality, cost-effective machinery solutions. These honors reflect our unwavering dedication to excellence and our continuous efforts to meet and exceed customer expectations.
Top Reasons to Choose Our Used Bus Services
Still wondering why, among so many other options, you chose Keychain Venture CO.,LTD? The answer is simple: we not only have high-quality used vehicles sourced from across China, but we also provide excellent after-sales service.
Successful Cases
For more than 14 years, Keychain Venture CO.,LTD has been successfully selling hundreds of used buses and secondhand coaches to overseas customers.
Quality Assurance
At Keychain Venture CO.,LTD, we prioritize quality above all else. Our experienced inspectors will thoroughly inspect each used bus before shipping it.
Sales Experts
There are numerous factors to consider before purchasing a pre-owned bus. Our sales professionals are ready to answer any questions you may have.
Post-Sale Support
After shipment, our dedicated team is always available to assist with any questions, maintenance requests, or technical issues.
 
Customer-Centric
Our dedicated team prioritizes your satisfaction, providing personalized service and expert advice throughout the buying process.
Positive Reputation
Our dedication to quality and customer service has earned us a solid reputation in the industry and positive feedback from satisfied customers.
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Add: Room 107, Building C, Jinxing Avenue, Liangjiang New District, Chongqing
Tel: +86-13572980919
WhatsApp:+86-13572980919
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