Strategic Sourcing Guide for 16119 JA10B Throttle Bodies: Supplier Insights, Quality Assurance & Procurement Best Practices

China’s Auto Parts Manufacturing Clusters and the 16119 JA10B Ecosystem

The 16119 JA10B electronic throttle body, commonly used in Nissan and Infiniti engine systems, is a high-precision component where manufacturing concentration directly impacts supply chain efficiency. China dominates global production, with Zhejiang, Chongqing, and Guangdong serving as core hubs due to their deep integration of metallurgy, electronics, and automotive engineering. These regions host suppliers capable of end-to-end manufacturing—from die-cast aluminum housings to integrated motor control units—ensuring tight tolerances and reliable performance under variable thermal and electrical loads.

Wenzhou and Chongqing stand out for specialization in throttle valve assemblies. Their proximity to OEMs and Tier-1 suppliers enables rapid validation cycles and faster compliance with automotive-grade quality benchmarks. This ecosystem advantage translates into shorter development timelines and scalable output, with many facilities maintaining monthly capacities between 5,000 and 20,000 units. For international buyers, this means access to both volume pricing and low-MOQ sampling options across multiple qualified vendors.

Evaluating Supplier Maturity Beyond Basic Metrics

Selecting the right supplier requires more than comparing price tags or delivery promises. A comprehensive evaluation should integrate technical capability, operational responsiveness, and long-term risk mitigation.

Quality and Compliance Verification

While formal ISO/TS 16949 certification isn’t always listed, indicators such as consistent product numbering, detailed technical specifications, and traceable material sourcing suggest process discipline. Buyers should request test reports covering airflow linearity, idle stability, and actuator response time across temperature ranges (typically -30°C to +85°C). Components destined for EU markets must also meet CE and RoHS standards, which reputable exporters like Hunan Smark Import & Export Co., Ltd. typically support upon request.

Operational Reliability Indicators

On-time delivery rates above 95%, sub-6-hour response times, and annual online revenues exceeding US $200,000 signal established export operations. For example, Chongqing A.R.K Auto Parts Co., Ltd. reports a 94% on-time rate and US $240,000+ in digital sales, indicating robust logistics management despite a higher reorder rate (33%), which may reflect competitive pricing driving repeat trial purchases rather than full customer lock-in.

In contrast, Wenzhou Kuli Auto Parts Co., Ltd. achieves a perfect 100% on-time delivery record and responds within one hour—ideal for urgent replacement needs—even though its revenue footprint is smaller. This suggests a lean, agile operation optimized for reliability over scale.

Risk Mitigation in Transactions

To reduce procurement risk:

• Use Alibaba Trade Assurance or third-party escrow to align payments with shipment milestones.
• Request physical or digital samples before bulk ordering—especially when integrating components into sensitive engine control systems.
• Verify packaging protocols: anti-static bags, foam cushioning, and moisture barriers are essential for preserving sensor integrity during transit.
• Confirm documentation readiness, including commercial invoices, packing lists, and any required conformity declarations for customs clearance in North America or Europe.

Price Comparison and Value-Based Sourcing

Pricing for the 16119 JA10B varies significantly based on quality tier, order volume, and supplier strategy. Understanding these differences helps avoid false economies.

Supplier	Price Range (USD)	Min Order Quantity	Key Differentiators
Chongqing A.R.K Auto Parts	$12.85–22	10 pcs	Lowest unit cost; strong reorder volume
Hunan Smark	$38.50–42.80	6 pcs	Balanced MOQ; high revenue volume
Guangzhou Tang Pei	$9–110	2–5 pcs	Wide range; supports refurbished parts
Wenzhou Bit Automobile Parts	$45.25–55	10 pcs	Premium build focus; consistent pricing
Wenzhou Kuli Auto Parts	$30–55	1–2 pcs	Fast response; flexible small orders

The data reveals a clear trade-off: lower prices often come with higher MOQs and less responsive service. Chongqing A.R.K offers the most aggressive pricing but requires 10-piece minimums and has a slower average response. At the other end, Wenzhou Kuli provides single-unit availability and near-instant communication, albeit at a moderate premium. Guangzhou Tang Pei occupies a niche with an unusually wide price band ($9–110), likely reflecting mixed new/refurbished inventory and custom rebuilds—a valuable option for repair shops needing legacy or rare variants.

Procurement Workflow Optimization

A structured sourcing workflow enhances decision accuracy and reduces time-to-market:

1. Define Technical Requirements: Confirm exact OEM cross-reference (e.g., 16119-JA10A vs. 16119-JK20D), connector type, bore diameter, and calibration method.
2. Shortlist Suppliers by Capability: Filter for those listing multiple compatible models and offering sample units. Guangzhou Tang Pei Trading Co., Ltd. explicitly mentions part number matching and refurbishment, making it ideal for complex replacements.
3. Request and Test Samples: Evaluate mechanical fit, electrical continuity, and idle signal stability using a multimeter or ECU simulator.
4. Negotiate Terms: Clarify warranty policies, return conditions, and whether firmware updates or relearn procedures are supported.
5. Scale Gradually: Begin with mid-volume orders to assess consistency before committing to large inventories.

Frequently Asked Questions in Practice

What MOQs Are Realistically Negotiable?

While published MOQs range from 1 to 10 pieces, flexibility exists. Wenzhou-based suppliers like Kuli Auto Parts regularly fulfill single-unit orders, making them ideal for emergency replacements. Hunan Smark sets a 6-piece threshold, suitable for small workshops testing compatibility. Bulk buyers should note that per-unit costs drop significantly at 10+ units, especially with suppliers like Wenzhou Bit, where pricing remains stable across volume tiers.

How Long Should I Expect Lead Times?

Most suppliers with delivery rates above 95% maintain 15–25 days for production and preparation. Air freight adds 5–10 business days internationally; sea freight takes 25–40 days depending on destination port congestion. Expedited processing is often available for urgent needs—particularly from fast-responding vendors such as Wenzhou Kuli.

Can Suppliers Match Specific OEM Part Numbers?

Yes. Several suppliers list variants like 16119-EN20B, 16119-ED000, and 16119-AX000, indicating inventory depth. Guangzhou Tang Pei highlights "part numbers refurbished," suggesting remanufacturing capabilities for obsolete or discontinued models—an asset for servicing older vehicle fleets.

Are Samples Available for Testing?

Though not always advertised, sample acquisition is standard practice. Expect to pay full or near-full price (typically $9–$55) for initial units. Use this phase to conduct functional tests: check butterfly valve movement, resistance values, and compatibility with diagnostic tools. Some suppliers offer discounted first samples to establish trust.

What Packaging and Documentation Standards Apply?

Reputable exporters use sealed anti-static packaging with desiccants to prevent corrosion. Documentation includes invoice, packing list, and bill of lading. For regulated markets, confirm the supplier can provide CE, RoHS, or REACH compliance statements if required. Independent verification remains the buyer’s responsibility prior to import.