High Output Alternator for Honda Accord (2008-2012) 2.4L
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High-Capacity 250A Alternator for 2008-2012 Honda Accord (CP2 / CS1)
What it Does: The 250 Amp High Output Alternator supplies heavy-duty electrical current to the 2008-2012 Honda Accord to eliminate system voltage drop caused by high-demand audio amplifiers and auxiliary electronics.
The Stock Honda Accord Charging Limitation
Factory CP2 and CS1 chassis Accords equipped with the 2.4L engine rely on an OEM alternator engineered only to output 105 to 130 amps. When owners introduce aftermarket subwoofers, air suspension compressors, or secondary battery systems, the OEM diode bridge and stator windings quickly suffer from thermal saturation. Under elevated thermal loads, the factory unit drops below 13.2 volts at idle, causing dimming headlights, sluggish window regulators, and battery depletion.
The Engineering Solution
Manufactured in the USA, this high-output direct bolt-on alternator delivers 250 amps of stable current. Built using dense, high-temperature copper windings and a heavy-duty rectifier featuring avalanche diodes, it significantly improves low-RPM amperage recovery while dissipating excessive heat soak. The rotor is dynamically balanced for continuous stability throughout high-RPM operation, seamlessly replacing factory Denso assemblies including OEM part numbers 31100-R40-A01 and 104210-5890 without engine bracket modifications.
What's Included
- 1x 250 Amp High Output Alternator
Technical Specifications
| Fitment | 2008-2012 Honda Accord |
|---|---|
| Engine / Chassis | K24Z2, K24Z3 / CP2, CS1 |
| Stock Output | 177-190 hp / 161-162 lb-ft |
| Replaces OEM Part # | 31100R40A01, 1042105890, 210-0644, 11390R, 11390, 31100-R40-A01, 104210-5890, 11390-250A |
Compatibility
- 2008-2012 Honda Accord LX (2.4L L4)
- 2008-2012 Honda Accord LX-P (2.4L L4)
- 2008-2012 Honda Accord EX (2.4L L4)
- 2008-2012 Honda Accord EX-L (2.4L L4)
Frequently Asked Questions & Fitment Warnings
Does this fit the CP2 / CS1 Accord?
Yes, this is a direct fit for the 2008-2012 Honda Accord equipped with the K24Z2 or K24Z3 2.4L engine.
Do I need to upgrade my vehicle wiring?
To safely transfer 250 amps, installing a 0-gauge or 4-gauge Big-3 wiring upgrade between the alternator, battery, and chassis ground is strongly recommended.
The Honda Performance Standard
Deliver rock-solid electrical stability and uninterrupted charging across the entire rev-range of your high-revving K-series platform.
Fitment
Fitment
Warranty
Warranty
