53% under what the other stores charge
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The Bosch 22SI is a 120-amp, 12-volt replacement alternator built to OEM specifications, with an internal regulator and a polished aluminum housing. It fits J180 short and long hinge mounts and turns clockwise, so it drops into many domestic and import applications, including BMW X5 models that use part 12317501599. Its 120-amp output covers cars with heavy electrical loads, and Bosch's remanufactured and new units have a long reputation for durable regulators and bearings. Compared with cheaper no-name alternators, it costs more but is the safer match for factory wiring and pulley alignment.
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Lowest price we've seen: $129.02 on Nov 11 at Amazon. Tracked across 10 stores since Nov 11.
Owners of Bosch alternators generally report solid charging and long service life, with the internal regulator holding voltage steady. Complaints center on price and on occasional units that arrive faulty or noisy.
