We Stand Behind Every Part We Ship
From warranty coverage to technical troubleshooting, Margrina's after-sales team is committed to protecting your supply chain investment and keeping your business moving.
12-Month Warranty on All Aftermarket Products
Every component we ship is backed by a 1-year warranty covering manufacturing defects and performance failures under normal operating conditions. We take full accountability for product quality from our facility to your customer's vehicle.
- Coverage: Manufacturing defects, material failures, and performance deviations from agreed specifications
- Scope: All aftermarket products including throttle bodies, sensors, solenoid valves, ignition coils, fuel injectors, and more
- Traceability: Full two-way traceability from raw material batch to end customer -- every claim is investigated thoroughly
- OEM/ODM: Custom warranty terms available for OEM and ODM partnerships -- negotiable based on volume and product type
Exclusions: Warranty does not cover damage caused by improper installation, unauthorized modification, accidents, or use outside specified operating conditions.
Backed by full-process quality inspection and two-way traceability. If a product fails, we find the root cause -- not just replace it.
For OEM/ODM partners: Extended warranty terms and dedicated quality agreements are available. Contact your account manager to discuss custom arrangements.
Expert Help, Multiple Channels
Our technical support team has an average of 10+ years of industry experience. Whether it's OE application queries, installation guidance, or a product compatibility issue -- we're here to resolve it fast.
Email Support
Send us detailed inquiries, photos, or test reports. Best for documentation-heavy issues, warranty claims, and formal communications.
WhatsApp / WeChat
Real-time messaging for urgent questions, quick OE application checks, or follow-ups on existing orders. Preferred by many of our global partners.
Video Call Consultation
Schedule a video call with our technical engineers for complex issues, product development discussions, or new partnership onboarding.
What Our Technical Team Can Help With
Our engineers bring deep expertise across all engine management system components we produce. No question is too technical.
Straightforward, Fair, and Efficient
We've designed our return and exchange process to minimize disruption to your operations. Clear steps, defined timelines, and a dedicated team to handle every case.
Submit a Claim
Contact us via email or messaging with your order number, product details, photos or videos of the issue, and a brief description.
Review & Assessment
Our QC team reviews your submission, cross-references production records, and may request additional samples or documentation for analysis.
Resolution Decision
We confirm the outcome: replacement shipment, credit note, or refund -- whichever best suits your situation and our mutual agreement.
Resolved & Shipped
Replacement goods are dispatched promptly. We follow up to confirm receipt and satisfaction, then close the case with a quality improvement note.
Accepted Returns
- • Manufacturing defects confirmed by QC
- • Wrong items shipped vs. order
- • Performance failure within warranty period
- • Goods damaged in transit (with evidence)
Not Covered
- • Damage from improper installation
- • Unauthorized modification or tampering
- • Normal wear and consumable parts
- • Claims submitted after warranty expiry
What to Prepare
- • Original order / invoice number
- • Part number and batch code (if visible)
- • Clear photos or video of the defect
- • Description of failure conditions
Clear Timelines You Can Plan Around
We know that uncertainty in after-sales response is one of the biggest pain points for procurement managers. Here's exactly what to expect from us.
| Request Type | Channel | Response Time |
|---|---|---|
|
General Inquiry
Product, pricing, availability
|
Email / WhatsApp | ≤ 24 hours |
|
Technical Support
OE queries, fitment, troubleshooting
|
Email / WhatsApp / Video Call | ≤ 24 hours |
|
Warranty Claim
Defect report, quality complaint
|
Email (with documentation) | ≤ 48 hours |
|
Return / Exchange
Logistics & replacement coordination
|
Email / Account Manager | ≤ 48 hours |
|
ODM / Custom Project
Feasibility review & proposal
|
Email / Video Consultation | ≤ 3 business days |
Business hours: Monday-Friday, 09:00-18:00 CST (UTC+8). Urgent cases flagged as high-priority are escalated immediately.
Have an After-Sales Issue?
Let's Resolve It Together.
Our support team is ready to assist. Reach out with your order details and we'll get back to you within 24 hours -- no matter where you are in the world.
Serving auto parts wholesalers, distributors, and importers globally -- from trial orders to full container supply.