The 31100PLMA01 Car Alternator is a high-performance power generation unit engineered for reliable electrical supply in modern vehicles. Mounted directly on the engine and driven by the serpentine belt, it converts mechanical energy into electrical power to charge the battery and support all onboard electronics-from headlights to infotainment systems. Built with precision-wound copper windings and durable rectifiers, it ensures stable voltage output even under high-demand conditions, extending battery life and preventing unexpected breakdowns. As a direct OE replacement, it is rigorously tested for compatibility with a wide range of Honda and Acura models, offering a perfect fit and plug-and-play installation.






Technical Specifications
|
Item |
Specification |
|
Part Name |
Alternator |
|
OEM |
13893 31100PLMA01 |
|
Voltage (V) |
12 |
|
Amperage (A) |
70 |
|
Signal type |
L-IG-C-DFM(FR) |
|
Condition |
Aftermarket new |
|
Pulley |
6-groove |
|
Operating Temperature |
-40℃ ~ +180℃ |
|
Application |
Honda Civic 2001-2005 |
Compatible Vehicle Models
|
Honda |
Civic 2001-2005 1.7L l4 |
|
Acura |
EL 2001-2005 1.7L l4 |
Replace OE: 06311-PLM-505RM, 13893, 13893N, 213893, 2-13893, 31100PLMA01, 31100-PLM-A01, 31100PLMA02, 31100-PLM-A02, 31100PLMA02RM, 31100-PLM-A02RM, 31100PLMC01, 31100-PLM-C01, 31100PLMC02, 31100-PLM-C02, 3341427A, 334-1427A, 40048035, 400-48035, 90273268
Structural Composition
| Stator & Rotor Assembly | High-grade laminated steel core with precision-wound copper windings, designed to generate maximum electromagnetic flux and deliver consistent output power under varying engine speeds. |
| Voltage Regulator Module | Integrated smart IC regulator with temperature compensation circuitry, maintaining stable voltage output between 13.5V and 14.8V to protect sensitive vehicle electronics and optimize battery charging. |
| Rectifier Bridge | Heavy-duty diode pack with high surge current capacity, efficiently converting AC to DC power while withstanding extreme electrical loads and preventing reverse current discharge. |
| Front & Rear Housing | Die-cast aluminum alloy construction with anti-corrosion coating, engineered for optimal heat dissipation and structural rigidity to withstand engine vibration and thermal expansion. |
| Pulley System | Precision-machined overrunning alternator pulley (OAP) or standard V-ribbed pulley (depending on application), reducing belt tension fluctuations and ensuring smooth, quiet operation. |
| Bearing Assembly | Sealed high-speed ball bearings with high-temperature grease lubrication, tested for over 10,000 hours of continuous operation under extreme conditions. |
| Electrical Output Terminal | Heavy-duty B+ stud terminal with insulated protective cover, featuring corrosion-resistant plating and high-conductivity copper alloy for minimal power loss. |
| Internal Cooling Fan | Integrated dual internal fan blades (specific to housing design) maximizing airflow through the alternator core to maintain optimal operating temperatures during high-output demand. |
Installation and Usage Notes
- Safety First – Disconnect Battery: Before beginning installation, always disconnect the negative terminal of the vehicle battery to prevent short circuits, electrical shocks, or accidental activation of the charging system during work.
- Verify Belt Tension and Alignment: Ensure the serpentine belt is in good condition and properly aligned with the alternator pulley. Incorrect belt tension-either too loose or too tight-can cause slippage, noise, or premature bearing wear. Replace the belt if signs of cracking or glazing are present.
- Check Wiring and Connectors: Inspect the main B+ output cable and the two-pin excitation connector (if applicable) for corrosion, fraying, or loose terminals. Clean all contact points and apply dielectric grease to prevent future oxidation and ensure stable electrical flow.
- Match Pulley Specifications: Confirm that the replacement alternator includes the correct pulley type for your vehicle-standard V-ribbed or overrunning alternator pulley (OAP). Using the wrong pulley can lead to belt vibration, noise, and reduced accessory drive life.
- Post-Installation Voltage Test: After installation, reconnect the battery and start the engine. Use a multimeter to measure charging voltage across the battery terminals. Normal regulated output should read between 13.5V and 14.8V at idle with moderate electrical load. Readings outside this range may indicate improper installation or a faulty regulator.
- Clear Fault Codes (If Needed): On modern vehicles with intelligent battery management systems (IBS), the ECU may store low-voltage fault codes after alternator replacement. Use a diagnostic scanner (e.g., VCDS, Autel, or Launch) to clear any stored codes and, if required, perform a battery registration or system reset.
- Allow Initial Break-In Period: During the first 50–100 km of driving, avoid sustained high electrical loads (e.g., aftermarket amplifiers, winches) to allow the internal components-especially brushes and slip rings-to seat properly for optimal long-term performance.
- Routine Maintenance Checks: Periodically inspect the alternator mounting bolts for tightness and listen for unusual noises like grinding or whining, which may indicate bearing wear. Keep the alternator exterior free of oil, coolant, and excessive dirt to maintain cooling efficiency.
- Compatibility with Stop-Start Systems: If your vehicle is equipped with start-stop technology, verify that the 31100PLMA01 alternator is specifically designed for such applications. Smart charging alternators require LIN bus communication and may need additional software coding after installation to function correctly.
Key Features
Engineered strictly to original equipment manufacturing specifications, the 31100PLMA01 alternator is a direct drop-in replacement. It aligns perfectly with the original mounting brackets and electrical connectors, requiring no modifications, belt realignments, or wiring harness changes for a hassle-free installation.
Equipped with a high-efficiency rectifier and advanced voltage regulator, this alternator delivers a stable and consistent power output. It ensures a steady flow of electricity to charge the battery and support all onboard electronics-from high-beam headlights to infotainment systems-eliminating voltage fluctuations that can damage sensitive components.
Built to withstand extreme engine bay temperatures, the housing is constructed from high-strength, die-cast aluminum for superior heat dissipation. The internal copper windings and durable bearings are engineered for high rotational speeds and long-lasting performance, ensuring reliable operation even during peak electrical loads.
Integrated with built surge protection and reverse battery connection safeguards. The fully sealed casing achieves IP6K9K dustproof and waterproof protection, effectively shielding the internal circuitry from oil, moisture, and road debris. This prevents premature failure and protects the vehicle's ECU from voltage spikes.
Manufactured in compliance with IATF 16949 automotive quality standards. Each unit undergoes rigorous end-of-line testing-including output current tests, temperature cycling, and durability simulations-ensuring a 100% factory pass rate and an extended service life that meets or exceeds Original Equipment (OE) specifications.
Company Profile


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FAQ
Q: Who are we?
A: We are based in Shanghai, China, start from 2004,sell to Domestic Market(55.00%),North America(10.00%),Central
America(10.00%),South America(7.00%),Eastern Europe(4.00%),Mid East(4.00%),Western Europe(4.00%),Southeast Asia(2.00%),Eastern
Asia(1.00%),Southern Europe(1.00%),Northern Europe(1.00%),Africa(1.00%). There are total about 1000+ people in our office.
Q: How can we guarantee quality?
A: Always a pre-production sample before mass production;
Always final Inspection before shipment;
Q: What can you buy from us?
A: Auto Electrical Systems,Auto Engine Systems,Auto Steering Systems,Auto Suspension Systems,Auto Transmission Systems
Q: Why should you buy from us not from other suppliers?
A: Changhui group has over 4 0 years' experience in manufacturing auto electrics & electronics, has QC and OEM service capability. 40 years' industry professional accumulation made it to be automotive expert in auto electrics, electronics & EPS.
Q: What services can we provide?
A: Accepted Delivery Terms: FOB,CIF,DDP,DDU,Express Delivery;
Accepted Payment Currency:USD,EUR,CNY;
Accepted Payment Type: T/T,L/C,Western Union,Cash;
Language Spoken:English,Chinese,Spanish,German,French,Russian,Korean
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