High Output Alternator for Acura TSX (2010-2014) 3.5L

High-Output 250A Alternator for 2010-2014 Acura TSX (CU4)

What it Does: The 250-Amp High Output Alternator replaces the low-output factory charging unit on the 2010-2014 Acura TSX 3.5L to eliminate voltage sag and supply stable electrical current under heavy electrical demands.

The Stock Acura TSX Charging Limitations

The OEM charging system on the J35Z3 3.5L V6 engine utilizes a stock 130-amp alternator engineered strictly for factory electrical loads. When adding high-draw aftermarket audio systems, auxiliary lighting, or performance electronics, the factory unit suffers severe thermal saturation and stator heat soak. Under high electrical draw at idle, the stock unit sags below 12.8V, generating excessive diode ripple, straining the battery, and causing persistent voltage fluctuations across the sensitive CU4 chassis CAN bus network.

The Engineering Solution

Manufactured in the USA, this heavy-duty 250-amp alternator features precision hand-wound high-temperature copper stators, an upgraded rotor assembly, and heavy-duty 12-diode rectifier bridge cooling plates. Engineered to provide over 140 amps at idle and a sustained 250 amps at operating speeds, it delivers a consistent 14.4V charging output. This direct-replacement design maintains stock serpentine belt geometry and directly supersedes OEM part numbers 31100-RGW-A01 and 104210-5920 without mounting modifications.

What's Included

• 1 x 250-Amp High Output Alternator

Technical Specifications

Compatibility

• 2010-2014 Acura TSX 3.5L V6 Base Sedan (CU4)
• 2010-2014 Acura TSX 3.5L V6 Technology Package Sedan (CU4)

Frequently Asked Questions & Fitment Warnings

Does this fit the CU4 TSX?

Yes, this is a direct bolt-on fit for the 2010-2014 Acura TSX equipped with the J35Z3 3.5L V6 engine. Does not fit 2.4L 4-cylinder (K24Z3 / CU2 chassis) models due to alternate bracket and plug configurations.

Do I need to upgrade my main power wiring?

Yes, executing a 0-gauge or 4-gauge "Big 3" wiring upgrade (alternator positive to battery, engine ground, and chassis ground) is strongly advised to support 250-amp flow without creating thermal resistance bottlenecks.

The Acura Engineering Standard

Built to handle the high electrical and thermal tolerances expected of premium JDM V6 platforms, this high-output unit ensures continuous voltage stability, maximum spark energy, and consistent charging performance under heavy power consumption.