High Output Alternator for Mazda 3 (2004-2006) 2.0L 2.3L
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High-Amp 250A Alternator for 2004-2006 Mazda 3 (BK)
What it Does: The 250-amp high-output alternator replaces the factory charging unit on the 2004-2006 Mazda 3 to eliminate voltage drops and supply stable electrical current for high-demand aftermarket electronics.
The Stock Mazda 3 Charging System Limitations
The factory BK platform alternator produces only 90 to 110 amps from the factory, which rapidly degrades under high-load conditions. When running upgraded car audio, auxiliary lighting, or high-draw cooling fans on the MZR platform, the stock unit suffers from severe thermal saturation and voltage drops below 12.6V at idle. This insufficient current leads to premature battery sulfation, ECU sensor voltage fluctuations, and diode bridge failure caused by continuous operation near max capacity.
The Engineering Solution
Manufactured in the USA, this direct-replacement 250-amp alternator resolves charging bottlenecks across the entire RPM band. Built with high-purity copper windings, high-efficiency heavy-duty diode rectifiers, and premium internal voltage regulation, it delivers steady operating voltage even during high electrical draw at idle. The heavy-duty aluminum casing promotes rapid heat dissipation, preventing stator burnout and extending bearing service life under demanding operating conditions.
What's Included
- 1 x 250-Amp High Output Alternator
Technical Specifications
| Fitment | 2004-2006 Mazda 3 |
|---|---|
| Engine / Chassis | 2.0L (LF-VE), 2.3L (L3-VE) / BK Chassis |
| Stock Output | 148-160 hp / 135-150 lb-ft |
| Replaces OEM Part # | 11008, AL4238N, 210-4214, LF50-18-300, LF50-18-300A, A3TG1391A, A3TG1391, 11008-250A |
Compatibility
- 2004-2006 Mazda 3 2.0L L4
- 2004-2006 Mazda 3 2.3L L4
Frequently Asked Questions & Fitment Warnings
Does this fit the BK 3?
Yes, this is a direct bolt-on fit for the 2004-2006 Mazda 3 equipped with the 2.0L or 2.3L MZR naturally aspirated engine. It does not fit turbocharged Mazdaspeed models.
Do I need to upgrade my wiring with this 250A alternator?
Yes, a "Big 3" or "Big 4" wiring upgrade with minimum 1/0 AWG cabling is strongly recommended to handle 250 amps safely without line resistance or heat buildup.
The Mazda Performance Standard
Optimized for the spirited driving dynamics of the Japanese-engineered BK platform, this high-amp charging solution supplies clean, uncompromised power so your ignition system, fuel delivery, and accessory electronics operate with total reliability under all loads.
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