High Output Alternator for Acura MDX ZDX (2010-2013) 3.7L
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High-Capacity 250A Replacement Alternator for 2010-2013 Acura MDX, ZDX (YD2 / YB1)
What it Does: The 250 Amp High Output Alternator replaces the factory charging unit on the 2010-2013 Acura MDX and ZDX to deliver stable high-amperage current and prevent voltage drop under heavy electrical loads.
The Stock Acura MDX,ZDX Charging System Bottleneck
The factory 130-amp charging system on the YD2 MDX and YB1 ZDX platforms struggles once aftermarket accessories are introduced. High-draw electronics, audio systems, auxiliary lighting, and heavy cabin power demands overheat the factory internal diode bridge. This causes severe thermal saturation, battery discharge at idle, erratic sensor readings, and premature rectifier breakdown on high-mileage J37A1 and J37A5 powerplants.
The Engineering Solution
Engineered for high current delivery, this direct-mount 250-amp alternator utilizes dense heavy-gauge copper windings and high-temp insulated wire to produce maximum output without heat fade. Built with an oversized heavy-duty internal rectifier, high-tolerance avalanche diodes, and low-drag bearings, it optimizes heat dissipation across the case while maintaining seamless charging rail stability at curb idle and peak RPM.
What's Included
- 1x 250 Amp High Output Alternator
Technical Specifications
| Fitment | 2010-2013 Acura MDX, ZDX |
|---|---|
| Engine / Chassis | J37A1, J37A5 (3.7L V6) / YD2, YB1 |
| Stock Output | 300 hp / 270 lb-ft |
| Replaces OEM Part # | 104210-5920, 11391N, 11391R, 31100-RGW-A01, 31100-RGW-A01RM, CSF92, 11391, 11391-250A |
Compatibility
- 2010-2013 Acura MDX 3.7L V6
- 2010-2013 Acura ZDX 3.7L V6
Frequently Asked Questions & Fitment Warnings
Does this fit the YD2 / YB1 MDX, ZDX?
Yes, this is a direct bolt-in fit for the 2010-2013 Acura MDX and ZDX equipped with the J37 3.7L engine utilizing factory mounting bracket locations.
Do I need to upgrade my main power cables?
To safely handle the full 250-amp output without thermal choking, executing a "Big 3" 1/0-gauge cable upgrade between the alternator, battery, and chassis ground is strongly recommended.
The Acura Caliber
Maintain proper 14.4V supply across your vehicle's sensitive CAN-bus network, SH-AWD rear differential actuators, and electronic control modules by installing a heavy-duty charging platform built to handle severe electrical loads.
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