High Output Alternator for Acura TSX (2010-2014) 2.4L

High-Amp 250A Alternator for 2010-2014 Acura TSX (CU2)

What it Does: The 250 Amp High Output Alternator replaces the low-output factory charging unit on the 2010-2014 TSX to deliver stable, high-amperage electrical current under heavy aftermarket loads and eliminate voltage drop.

The Stock Acura TSX Electrical Limitation

The OEM charging system on the CU2 chassis is engineered strictly for factory electrical demand, utilizing a modest factory alternator rated around 105 to 115 amps. When enthusiasts introduce aftermarket audio systems, supplemental cooling fans, air suspension compressors, or high-draw electronics, the stock unit suffers catastrophic thermal stress and severe voltage sag at idle. Internal diodes degrade rapidly from heat soak, leading to dimming lights, ECU voltage-drop codes, premature battery failure, and inadequate power delivery to the coil packs on the K24Z3 powertrain.

The Engineering Solution

Hand-built in the USA, this heavy-duty 250-amp alternator delivers substantial current reserves across the entire RPM range, maintaining peak output even at low engine speeds. Engineered with heavy-gauge pure copper stator windings, dual internal rectifiers, and high-temperature avalanche diodes, this unit effectively mitigates resistance and dissipates thermal build-up under continuous full-duty cycles. Direct bolt-on mounting geometry guarantees seamless alignment with the factory accessory drive and serpentine belt without housing modifications, replacing troublesome factory numbers such as 31100-R40-A01 and 104210-5890.

What's Included

• 1 x 250 Amp High Output Alternator

Technical Specifications

Compatibility

• 2010 Acura TSX Base Sedan & Sport Wagon 2.4L L4
• 2011 Acura TSX Base Sedan & Sport Wagon 2.4L L4
• 2012 Acura TSX Base Sedan & Sport Wagon 2.4L L4
• 2013 Acura TSX Base Sedan & Sport Wagon 2.4L L4
• 2014 Acura TSX Base Sedan & Sport Wagon 2.4L L4

Frequently Asked Questions & Fitment Warnings

Does this fit the CU2 TSX?

Yes, this is a direct bolt-in fit for the 2010-2014 Acura TSX equipped with the 2.4L K24Z3 engine; it does not fit TSX models equipped with the 3.5L V6 (J35Z6).

Do I need to upgrade my main charging cables?

Yes, executing a "Big 3" wiring upgrade with minimum 1/0 AWG power and ground cables is mandatory to safely carry 250 amps without causing excessive circuit resistance or cable overheating.

The Acura Caliber

Keep your performance JDM sedan operating at peak voltage and ignition capability without electrical drop-offs across every gear.