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The Bosch AL4121X is a 180-amp, 12-volt alternator with an internal fan and internal voltage regulator in an aluminum case. The high output suits cars with heavy electrical loads such as audio systems, lighting or accessories. It is a remanufactured-style replacement built to fit specific Kia applications, so buyers should confirm the part number against their engine before ordering. Bosch alternators are widely regarded as durable, though some owners report units that fail early or arrive with the wrong pulley.
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Lowest price we've seen: $280.37 on Nov 8 at Walmart. Tracked across 1 store since Nov 8.
Owners of Bosch alternators generally report solid charging and long service life, but some units fail early or arrive with incorrect fitment.
The Bosch AL4121X is a premium replacement alternator rated at 12 volts and 180 amps. It has an aluminum case, an internal fan and an internal regulator.
The alternator turns clockwise and uses negative ground. Its mounting configuration code is Short, and the plug clock position is 10 with the main mounting ear at 6 o'clock.
