LONGTOPAUTO PARTS

Quality system

TESTED BEFORE IT LEAVES.

QUALITY SYSTEM

EVERY UNIT MUST PASS.

Process control is practical: measure, test, record, then release. The purpose is stable performance in your customer’s vehicle.

  1. STEP 01

    Incoming inspection

  2. STEP 02

    Assembly inspection

  3. STEP 03

    Bench performance test

  4. STEP 04

    Insulation test

  5. STEP 05

    Pre-shipment inspection

TEST EQUIPMENT

MEASURED, NOT ASSUMED.

Alternator test bench

Validates voltage regulation and output current

Starter load tester

Checks engagement and cranking performance

Insulation resistance tester

Verifies electrical safety before packing

CERTIFICATES & REPORTS

DOCUMENTED FOR TRADE.

ISO 9001:2015

LT-QA-9001 · QMS Certification · Valid to 2027

Product Test Report

LT-TR-2026-018 · Internal Laboratory · Issued Jan 2026

Export Compliance File

LT-EC-067 · LongTop Quality Dept. · Updated Mar 2026

12-month warranty applies to verified product defects. Read warranty policy →