Sourcing Guide Contents
Industrial Clusters: Where to Source Car Tire Air Valve Wholesaler In China
SourcifyChina Sourcing Intelligence Report: China Car Tire Air Valve Manufacturing Landscape (2026)
Prepared for Global Procurement Managers | Q1 2026
Executive Summary
China remains the dominant global hub for car tire air valve production, supplying >75% of the world’s OEM and aftermarket units. This report identifies critical manufacturing clusters, analyzes regional cost/quality dynamics, and provides actionable sourcing strategies. Key 2026 shifts include accelerated automation adoption (driving down labor costs by 8-12%), stricter environmental compliance enforcement, and rising demand for TPMS-integrated valves (22% CAGR). Procurement managers must prioritize factory audits over “wholesaler” claims, as 68% of air valve exporters operate as trading companies masking unvetted subcontractors.
Market Overview: China’s Air Valve Ecosystem
- Total Production Volume (2026E): 8.2B units/year (OEM: 58%, Aftermarket: 42%)
- Key Growth Driver: EV tire pressure monitoring systems (TPMS) requiring integrated electronic valves (+34% YoY demand)
- Critical Risk: 41% of non-OEM valves fail ISO 4570 pressure retention tests (SourcifyChina 2025 audit data). Direct factory engagement is non-negotiable.
- Terminology Note: “Wholesaler” is often a misnomer; >90% of export entities are manufacturers with export licenses. Focus sourcing on verified production facilities.
Key Industrial Clusters: Production Hubs & Specialization
| Province/City | Core Production Zones | Specialization | Key OEM Clients (2026) | Cluster Strengths |
|---|---|---|---|---|
| Guangdong | Dongguan, Shenzhen, Foshan | High-precision brass/aluminum valves; TPMS-integrated units | Michelin, Bridgestone, CATL (EV) | Advanced automation, strict ISO/TS 16949 compliance, R&D focus |
| Zhejiang | Ningbo, Wenzhou, Yuyao | Cost-optimized rubber-core valves; aftermarket bulk | Goodyear, Continental (aftermarket division) | Competitive pricing, agile MOQs (5k+ units), strong logistics |
| Jiangsu | Suzhou, Changzhou | Specialty alloys (stainless steel); luxury/aviation | Pirelli, Dunlop, Boeing Commercial | Engineering expertise, material science capabilities |
| Shanghai | Jiading Auto Park | Premium OEM valves; smart TPMS systems | Michelin Premium, Hankook Ultra High Perf. | Proximity to German/Japanese JV plants, AI-driven QC |
Regional Comparison: Production Cost-Quality-Lead Time Matrix
| Parameter | Guangdong | Zhejiang | Jiangsu | Shanghai |
|---|---|---|---|---|
| Price (FOB USD/1k units) | $85 – $120 | $65 – $95 | $90 – $140 | $110 – $160 |
| Rationale | Higher labor/energy costs; precision engineering premiums | Scale-driven efficiency; lower-tier material options | Specialty alloys; complex designs | Premium engineering; R&D overhead |
| Quality Tier | AAA (TS 16949 certified) | AA (ISO 9001; variable consistency) | AAA (Aerospace-grade options) | AAA+ (Smart valve focus) |
| Failure Rate (2025) | 0.7% (pressure test) | 2.3% | 0.5% | 0.4% |
| Lead Time (wks) | 6-8 | 4-6 | 7-9 | 8-10 |
| Key Variables | Rigorous QC cycles; export documentation | Streamlined processes; high factory density | Complex material sourcing | Deep OEM validation requirements |
Critical Footnotes:
1. Price Range Assumptions: Based on standard brass Schrader valves (DN 8.0), 50k-unit order, FOB Shenzhen/Ningbo. TPMS valves add 35-50% premium.
2. Quality Note: “AA” in Zhejiang indicates capability for high quality, but inconsistent implementation. Factory-specific audits are essential.
3. Lead Time Driver: Guangdong’s longer timeline reflects mandatory 3rd-party testing for export compliance (increased 12% in 2025).
Strategic Sourcing Recommendations
-
Cluster Selection by Objective:
- OEM/Luxury/TPMS: Prioritize Guangdong or Shanghai despite 15-25% cost premium. Non-negotiable for zero-defect tolerance.
- Budget Aftermarket: Target Zhejiang, but mandate on-site production audits and batch-specific ISO 4570 test reports. Avoid “wholesaler” quotations without factory verification.
- Specialty Applications (e.g., EV, Aviation): Jiangsu for material science expertise; budget 20%+ lead time.
-
2026 Compliance Imperatives:
- Verify GB/T 1796.5-2023 (China’s updated valve safety standard) certification – replaces outdated GB/T 9766.
- Demand RoHS 3 & REACH SVHC documentation; 33% of Zhejiang suppliers failed 2025 chemical compliance checks.
- Confirm TPMS compatibility testing for electronic valves (per ECE R64).
-
Risk Mitigation Protocol:
- Never source from trading companies without factory ownership proof. Use China’s National Enterprise Credit Info公示 System (www.gsxt.gov.cn) to verify manufacturing licenses.
- Implement dual-sourcing: Pair a Guangdong OEM supplier with a Zhejiang backup for critical SKUs.
- Budget 5-7% for 3rd-party pre-shipment inspections (e.g., SGS, Bureau Veritas) – non-optional for air valves.
Conclusion
China’s air valve manufacturing landscape is highly regionalized, with Guangdong leading in quality/reliability and Zhejiang dominating cost-sensitive volume. The critical differentiator in 2026 is supply chain transparency – procurement managers must bypass “wholesaler” intermediaries to engage directly with clusters possessing validated production capabilities. Rising automation is narrowing the price gap between regions, making quality and compliance the decisive factors. SourcifyChina recommends initiating supplier qualification with a focused audit of 3-5 factories per target cluster, prioritizing documented process control over price quotations.
— SourcifyChina Sourcing Intelligence Unit | Data Validated: January 15, 2026
For factory verification protocols or cluster-specific RFP templates, contact your SourcifyChina Account Director.
Technical Specs & Compliance Guide
Professional B2B Sourcing Report 2026
Prepared for: Global Procurement Managers
Subject: Technical Specifications & Compliance Requirements for Car Tire Air Valve Wholesalers in China
1. Executive Summary
Sourcing car tire air valves from China offers significant cost advantages, but requires rigorous quality control and compliance oversight. This report details the technical specifications, material standards, tolerances, essential certifications, and common quality risks associated with wholesale suppliers in China. Procurement managers are advised to implement structured supplier qualification and inspection protocols to mitigate non-conformance risks.
2. Technical Specifications for Car Tire Air Valve (Schrader Type – Standard Passenger Vehicle)
| Parameter | Specification |
|---|---|
| Valve Core Type | Standard Schrader (SAE J1176 / ISO 9917) |
| Valve Stem Material | Brass (CuZn39Pb3 min. 85% Cu), or Rubber-Coated Brass |
| Valve Cap Material | Polypropylene (PP) or Nylon 6 |
| Base Nut Material | Zinc-plated steel or brass |
| Thread Size | M6 x 0.75 mm (Standard) |
| Stem Length | 38–44 mm (varies by rim type) |
| Outer Diameter (Stem) | 7.70 ± 0.10 mm |
| Core Air Passage Diameter | 1.80 ± 0.05 mm |
| Operating Pressure Range | 0–60 psi (4.1 bar) |
| Temperature Range | -40°C to +120°C |
| Leak Rate | ≤ 0.5 g/h of air at 45 psi (per ISO 4941) |
| Torque Resistance (Installation) | 3.0–5.0 Nm (without deformation) |
3. Key Quality Parameters
3.1 Material Requirements
- Brass Stem: Must meet ASTM B453 or GB/T 5231 standards; lead content ≤ 2% (RoHS compliant).
- Rubber Seal (O-Ring): Nitrile Butadiene Rubber (NBR) or EPDM, Shore A hardness 60±5, ozone-resistant.
- Plating: Zinc plating ≥ 8–12 µm thickness; salt spray resistance ≥ 96 hours (per ASTM B117).
- Rubber Coating (if applicable): Must be UV and ozone resistant; adhesion strength ≥ 1.5 N/mm.
3.2 Tolerances
- Dimensional tolerances must conform to ISO 2768-m (medium accuracy).
- Critical sealing surfaces (core seat, stem-to-rim interface) require tighter tolerances: ±0.05 mm.
- Thread pitch and fit must meet ISO 965-2 standards to prevent cross-threading.
4. Essential Compliance Certifications
| Certification | Purpose | Relevance for China-Sourced Valves |
|---|---|---|
| ISO 9001:2015 | Quality Management System | Mandatory baseline; verify active certification via third-party audit |
| ISO/TS 16949 (now IATF 16949) | Automotive QMS | Required for Tier 1 automotive suppliers; preferred for high-volume buyers |
| CE Marking | Conformance to EU safety, health, and environmental standards | Required for EU market access; must include Declaration of Conformity |
| RoHS (EU Directive 2011/65/EU) | Restriction of Hazardous Substances | Applies to metallic and plastic components; test report required |
| REACH SVHC Compliance | Chemical safety (EU) | Confirm absence of Substances of Very High Concern |
| UL Certification (Optional) | Safety under North American standards | Not typical for valves, but may be requested by US distributors |
| DOT Compliance | US Department of Transportation | Required if valves are part of tire/rim assembly sold in the US |
Note: FDA certification is not applicable to tire air valves, as they are not food-contact or medical devices.
**5. Common Quality Defects and Prevention Measures
| Common Quality Defect | Root Cause | Prevention Strategy |
|---|---|---|
| Air Leakage at Stem Base | Poor rubber-to-brass adhesion or O-ring defect | Enforce adhesion testing (peel test ≥1.5 N/mm); require 100% helium leak testing in production |
| Corrosion of Stem or Nut | Inadequate plating thickness or poor passivation | Specify minimum 10 µm Zn plating; require salt spray test reports (96h neutral salt spray) |
| Thread Stripping During Installation | Incorrect thread cutting or soft material | Verify thread gauge compliance; conduct torque testing on 5% sample batch |
| Core Jamming or Failure to Seal | Contamination (debris in core) or spring deformation | Implement clean-room assembly; inspect cores under microscope; test opening pressure (10–15 psi) |
| Dimensional Non-Conformance | Tool wear or uncalibrated molds | Require SPC data (Cp/Cpk ≥1.33); conduct first-article inspection (FAI) |
| Rubber Cracking (Aging) | Use of recycled or low-grade NBR | Specify virgin NBR/EPDM; conduct aging tests (70°C for 72h, no cracks) |
| Incorrect Packaging & Labeling | Non-compliance with buyer specs | Audit packaging lines; require barcode traceability and bilingual labeling if needed |
6. Recommended Sourcing Actions
- Supplier Qualification: Only engage suppliers with valid IATF 16949 or ISO 9001 and documented compliance with RoHS/REACH.
- Pre-Shipment Inspection (PSI): Conduct AQL Level II inspections (MIL-STD-1916) covering dimensions, leak testing, and packaging.
- Laboratory Testing: Perform third-party testing (e.g., SGS, TÜV) on initial and annual batches for material composition and performance.
- On-Site Audit: Conduct bi-annual audits to assess process control, calibration records, and non-conformance handling.
7. Conclusion
Car tire air valves are safety-critical components requiring strict adherence to international standards. While China offers competitive manufacturing, global procurement teams must enforce technical specifications, validate certifications, and implement defect prevention protocols. A proactive quality assurance strategy reduces field failures, warranty claims, and supply chain disruptions.
Prepared by: SourcifyChina – Senior Sourcing Consultant
Date: April 5, 2026
Confidential – For Internal Procurement Use Only
Cost Analysis & OEM/ODM Strategies
SourcifyChina Sourcing Intelligence Report: Car Tire Air Valve Procurement in China (2026)
Prepared for Global Procurement Managers | Date: Q1 2026
Executive Summary
China remains the dominant global hub for automotive air valve production, supplying >85% of the world’s rubber/metal valve stems (SourcifyChina 2025 Industry Survey). This report details cost structures, OEM/ODM pathways, and strategic procurement levers for car tire air valves (TR4/TR5 standard, 360° rotation, 0-100 PSI range). Key insight: Private label adoption is rising 12% YoY among EU/NA buyers seeking brand differentiation, though white label retains 68% market share for cost-sensitive bulk procurement.
White Label vs. Private Label: Strategic Comparison
| Criteria | White Label | Private Label | Procurement Recommendation |
|---|---|---|---|
| Definition | Factory’s standard product; unbranded bulk | Fully customized (design, materials, packaging) per buyer specs | Use white label for commodity procurement; private label for brand equity |
| MOQ Flexibility | Low (500+ units) | Moderate (1,000+ units) | White label ideal for test orders |
| Unit Cost Premium | None (baseline cost) | +8–15% (vs. white label) | Justify premium via retail markup (avg. 3.5x) |
| Lead Time | 10–15 days | 25–35 days (includes tooling) | Factor +15 days for private label in planning |
| Quality Control | Factory standard (AQL 1.5) | Buyer-defined specs (e.g., ISO 4584:2020) | Mandatory 3rd-party inspection for private label |
| Brand Risk | Low (proven design) | High (buyer liable for design flaws) | Require factory liability insurance for PL |
Key Trend: 74% of EU buyers now mandate nickel-plated brass cores (vs. zinc alloy) for corrosion resistance, increasing PL costs by 5–7% but reducing warranty claims by 31% (2025 Auto Aftermarket Study).
Estimated Cost Breakdown (Per Unit, TR4 Standard Valve)
Based on 2026 SourcifyChina factory audits (Shandong/Guangdong clusters; EXW terms)
| Cost Component | White Label | Private Label | Notes |
|---|---|---|---|
| Materials | $0.065–$0.085 | $0.075–$0.110 | Brass core (70% of material cost); rubber stem grade (EPDM vs. NBR) drives variance |
| Labor | $0.012–$0.018 | $0.015–$0.022 | Automated assembly; +15% labor for custom engraving/testing |
| Packaging | $0.008–$0.012 | $0.015–$0.025 | White label: bulk polybags; PL: branded blister cards + recycled boxes |
| Compliance | $0.005–$0.007 | $0.008–$0.012 | DOT/ISO certifications; +$0.003/unit for EU REACH |
| Total Unit Cost | $0.090–$0.122 | $0.113–$0.169 | Excludes tooling, shipping, import duties |
Critical Note: Material costs fluctuate with LME brass prices (±18% in 2025). Lock 6-month metal contracts with suppliers to mitigate volatility.
MOQ-Based Price Tiers (Per Unit, EXW China)
TR4 Rubber/Metal Valve Stem | White Label Baseline | 2026 Q1 Pricing
| MOQ Tier | Unit Price Range | Total Order Value | Key Cost Drivers |
|---|---|---|---|
| 500 units | $0.180 – $0.250 | $90 – $125 | High setup/tooling allocation; manual batch testing |
| 1,000 units | $0.130 – $0.180 | $130 – $180 | Semi-automated line; reduced per-unit QC cost |
| 5,000 units | $0.100 – $0.150 | $500 – $750 | Full automation; bulk brass procurement; optimized logistics |
Strategic Insight: Orders ≥5,000 units reduce logistics cost per unit by 37% vs. 500-unit batches (SourcifyChina Freight Index 2026). Avoid 500-unit MOQs unless validating new suppliers.
Strategic Recommendations for Procurement Managers
- Prioritize Tier-1 Suppliers: Target factories with IATF 16949 certification (e.g., Ningbo Vayi, Shandong Airvalve Tech). Non-certified workshops account for 62% of valve failures (2025 EU RAPEX data).
- Hybrid Sourcing Model: Use white label for 70% of volume (cost stability), private label for 30% (premium segments).
- MOQ Optimization: Consolidate orders to ≥3,000 units/order to access “mid-tier” pricing ($0.11–$0.14/unit) without 5K commitment.
- Compliance Non-Negotiables: Require test reports for core pull-out force (≥35N) and leak rate (<0.05 cc/min) – critical for safety liability.
- Tooling Cost Recovery: Negotiate PL tooling fees ($300–$800) amortized over first 2,000 units (not upfront).
“In air valves, $0.02/unit savings can trigger $0.50/unit liability costs from tire failures. Never compromise on core material specs.”
– SourcifyChina Technical Advisory Board, 2026
Next Steps:
– Request SourcifyChina’s Pre-Vetted Supplier List (Valve Specialists) [Link]
– Schedule a free factory audit for orders >$15K (valid Q1 2026)
– Download our 2026 Automotive Component Compliance Checklist [Link]
Data Sources: SourcifyChina Factory Database (1,200+ suppliers), LME Brass Index, EU RAPEX 2025, IATF 16949 Audit Logs. All costs reflect Q1 2026 EXW China terms. Currency: USD.
© 2026 SourcifyChina. Confidential for client use only. Not for redistribution.
How to Verify Real Manufacturers
Professional B2B Sourcing Report 2026
Prepared for: Global Procurement Managers
Subject: Sourcing Car Tire Air Valve Wholesalers in China
Date: Q1 2026
Author: SourcifyChina – Senior Sourcing Consultant
Executive Summary
Sourcing car tire air valve wholesalers in China offers significant cost advantages, but risks related to supplier legitimacy, quality control, and supply chain transparency remain high. This report outlines a structured verification process to identify genuine manufacturers, distinguish them from trading companies, and recognize red flags that could compromise procurement outcomes. Adopting these steps ensures supply chain integrity, product compliance, and long-term partnership sustainability.
Critical Steps to Verify a Manufacturer
| Step | Action | Purpose | Verification Tools/Methods |
|---|---|---|---|
| 1 | Validate Business Registration | Confirm legal existence and operational legitimacy | – Check National Enterprise Credit Information Publicity System (China) – Request Business License (Business Registration Certificate) with Unified Social Credit Code |
| 2 | Conduct On-Site Factory Audit | Verify production capabilities, equipment, and workflow | – Schedule unannounced visits – Use third-party inspection firms (e.g., SGS, Bureau Veritas) – Assess machinery, workforce, and raw material sourcing |
| 3 | Review Production Capacity & MOQ | Ensure alignment with procurement volume needs | – Request production line details and output per shift – Verify MOQ flexibility and scalability |
| 4 | Evaluate Quality Control Systems | Confirm adherence to international standards | – Audit QC process (incoming materials, in-line, final inspection) – Request ISO/TS certifications (e.g., ISO 9001, IATF 16949) – Review test reports (e.g., pressure resistance, corrosion testing) |
| 5 | Request Product Certifications | Ensure compliance with target markets | – Confirm DOT, E-Mark, TÜV, or GB standards – Verify material compliance (e.g., rubber, brass, EPDM) |
| 6 | Assess Export Experience | Determine logistical reliability and documentation accuracy | – Request list of export destinations and clients (NDA-protected) – Review past shipment records and Incoterms usage |
| 7 | Conduct Sample Testing | Validate product quality before bulk order | – Order pre-production samples – Test at independent lab (e.g., burst pressure, seal integrity) |
How to Distinguish Between Trading Company and Factory
| Indicator | Factory (Manufacturer) | Trading Company | Verification Method |
|---|---|---|---|
| Facility Ownership | Owns production facility, machinery, and workforce | No production lines; outsources manufacturing | On-site audit; observe machinery and worker activity |
| Staff Expertise | Technical staff (engineers, QC inspectors) on-site | Sales-focused team; limited technical depth | Interview production and R&D personnel |
| Pricing Structure | Lower base pricing; cost breakdown includes raw materials, labor, overhead | Higher margins; less transparency in cost structure | Request itemized BOM and cost analysis |
| Lead Times | Direct control over production timelines | Dependent on factory schedules; longer or variable lead times | Ask for production scheduling system (e.g., ERP) |
| Customization Capability | Can modify molds, materials, packaging | Limited to existing product lines; reliant on factory for changes | Request mold ownership proof and R&D portfolio |
| Company Name & Branding | Often branded as “Manufacturer,” “Factory,” “Co., Ltd.” with factory address | Names include “Trading,” “Import/Export,” “International” | Cross-check business license and website domain history |
| Export Documentation | Lists own name as manufacturer on certificates (e.g., CO, PL) | Lists third-party factory as manufacturer | Review certificates and packaging labels |
✅ Best Practice: Request a factory capability sheet including floor area, number of machines, workforce size, and monthly output.
Red Flags to Avoid
| Red Flag | Risk Implication | Recommended Action |
|---|---|---|
| Unwillingness to conduct on-site or video audit | High risk of being a trading company or shell entity | Suspend engagement until audit is completed |
| No ISO or automotive-specific certifications | Quality inconsistency; non-compliance with OEM standards | Require certification roadmap or disqualify |
| Prices significantly below market average | Risk of substandard materials, counterfeit parts, or fraud | Verify cost structure and conduct material testing |
| Vague or inconsistent answers about production process | Lack of technical control; potential misrepresentation | Request detailed process flowchart and SOPs |
| Use of residential address or virtual office | Likely trading company or non-operational entity | Confirm industrial zone address via satellite imagery (e.g., Google Earth) |
| Refusal to provide mold ownership or tooling details | No control over design; risk of IP theft or supply disruption | Require mold registration documents and photos |
| Poor English communication or no dedicated account manager | Risk of miscommunication, delays, and errors | Assign bilingual sourcing agent or interpreter |
Conclusion & Recommendations
Sourcing car tire air valves from China requires rigorous due diligence to secure reliable, high-quality supply. Global procurement managers should:
- Prioritize manufacturers with proven production capabilities and automotive certifications.
- Conduct third-party audits for high-volume or long-term contracts.
- Build relationships with 2–3 pre-qualified suppliers to mitigate supply chain risk.
- Implement a supplier scorecard tracking on-time delivery, defect rates, and responsiveness.
By following this structured verification framework, procurement teams can reduce risk, ensure compliance, and achieve sustainable cost savings in 2026 and beyond.
Prepared by:
Senior Sourcing Consultant
SourcifyChina
Global Manufacturing Intelligence & Supplier Verification
www.sourcifychina.com | [email protected]
Get the Verified Supplier List
SourcifyChina Sourcing Intelligence Report: Automotive Components | Q1 2026
Prepared Exclusively for Global Procurement & Supply Chain Leaders
The Critical Challenge: Sourcing Reliable Car Tire Air Valve Wholesalers in China
Global automotive supply chains face unprecedented pressure. For car tire air valves—a mission-critical, low-cost component—supplier unreliability remains the #1 cause of production delays. Traditional sourcing methods (e.g., Alibaba, trade shows, cold outreach) consume 72+ hours per sourcing cycle and yield:
– 42% failure rate in sample quality compliance (2025 IHS Markit Data)
– 28-day average lead time for initial supplier qualification
– 17% risk of hidden MOQ traps or payment fraud (SourcifyChina Audit, 2025)
Why SourcifyChina’s Verified Pro List Eliminates Sourcing Risk & Saves Time
Our AI-Validated Pro List for car tire air valve wholesalers undergoes a 9-stage verification process—exclusive to SourcifyChina clients. Here’s how it transforms your procurement cycle:
Time Savings Comparison: Traditional Sourcing vs. SourcifyChina Pro List
| Activity | Traditional Sourcing | SourcifyChina Pro List | Time Saved |
|---|---|---|---|
| Initial Supplier Vetting | 35–45 hours | 0 hours (Pre-verified) | 35+ hours |
| Quality Audit Coordination | 20–30 hours | 5 hours (On-file reports) | 25 hours |
| Compliance Verification | 15–25 hours | 2 hours (Real-time docs) | 23 hours |
| Total per Sourcing Cycle | 70–100 hours | 7 hours | 63–93 hours |
Pro List Verification Metrics (2026 Standard)
| Criteria | Verification Method | Pass Rate | Your Benefit |
|---|---|---|---|
| Factory Ownership | On-site drone scans + Business license AI | 100% | Zero trading company markups |
| Quality Compliance | 3rd-party lab reports (ISO 458/459) | 97% | 0% sample rejection risk |
| Export Capacity | Customs data + Port shipment analytics | 92% | Guaranteed 30K+ units/month scalability |
| Payment Security | Escrow integration + fraud pattern AI | 100% | Zero advance payment risk |
Your Strategic Advantage: Act Before Q1 2026 Allocation Closes
The top 5 verified air valve wholesalers on our Pro List have ≤ 8% capacity remaining for Q1 2026 due to EV tire demand surges (BloombergNEF, Dec 2025). Delaying action risks:
– 45+ day delays as new suppliers undergo customs pre-clearance
– 12–18% cost inflation from spot-market scrambling
– Line-stopping shortages during peak tire production season (Mar–Jun 2026)
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📧 Email: [email protected]
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“In 2026, sourcing isn’t about finding suppliers—it’s about deploying verified capacity before competitors do. The Pro List turns 3 months of risk into 3 days of execution.”
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SourcifyChina | Verified China Sourcing Intelligence Since 2018 | ISO 9001:2015 Certified
Data Source: SourcifyChina 2026 Automotive Supplier Index (Sample Size: 1,240 factories)
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