Help keep the battery charged and the electrical system supplied while the engine runs with the TERREPOWER (formerly BBB Industries) 7521, a premium-quality remanufactured 12-volt, 100-amp alternator designed for dependability and reliability throughout the vehicle's service life. It is listed for many models from Chrysler, Dodge and Plymouth, among them the 1970-1978 Dodge Charger 3.7L / 5.2L / 5.6L / 5.9L / 6.3L / 6.6L / 7.0L / 7.2L, 1970-1971 Chrysler 300 7.2L and 1975-1979 Dodge D100 3.7L / 5.2L / 5.9L / 6.6L / 7.2L.
- Output: 12 volts DC and a 100-amp rating, with negative ground and air cooling.
- Regulation and wiring: Works with an external voltage regulator. It is not one-wire capable, has no AC service tap and is not a brushless design.
- Pulley and fan included: A conventional two-groove V-belt pulley with a 74 mm (2-15/16 in) outside diameter and clockwise (right) rotation, plus an external fan.
- Plug clock: 12 o'clock, viewed from the rear with the main mounting ear at 6 o'clock.
Engines across the listed applications include L4-2.2L, L4-2.6L, L6-3.7L, V8-5.2L, V8-5.6L, V8-5.9L, V8-6.3L, V8-6.6L, V8-7.0L and V8-7.2L. Each application uses one alternator. See the "Vehicles it fits" section for the full list of vehicles, years and engines.
An alternator may need replacing if you notice dim or flickering lights, a battery warning light or a battery that keeps running low. A worn belt, weak battery or faulty wiring can cause the same signs, so test the charging system before replacing parts.
OE manufacturer: Chrysler. Country of origin: Mexico.
Interchange: 3755585 · 3874296 · 3874992 · 4091002 · 4091460 · 4091461 · 4226432 · 10463282
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
3755585, 3874296, 3874992, 4091002, 4091460, 4091461, 4226432, 10463282
Frequently Asked Questions
Is this the right Chrysler 300 alternator for a 1970-1971 Chrysler 300 7.2L?
It is listed for the 1970-1971 Chrysler 300 with the V8-7.2L engine, one per vehicle. Check the "Vehicles it fits" section to confirm your exact application.
Can I use this for an alternator replacement on a 1970-1978 Dodge Charger 3.7L / 5.2L / 5.6L / 5.9L / 6.3L / 6.6L / 7.0L / 7.2L?
It is listed for the 1970-1978 Dodge Charger with several engines, including L6-3.7L, V8-5.2L, V8-5.9L and V8-7.2L. The "Vehicles it fits" section shows the years for each engine.
What is the electrical rating of this alternator?
It is a 12-volt, 100-amp alternator with negative ground. It works with an external voltage regulator and is not one-wire capable.
Does it come with a pulley and fan?
Yes. It includes a conventional two-groove V-belt pulley with a 74 mm (2-15/16 in) outside diameter and an external fan for air cooling.
What are signs an alternator may need replacing?
Signs include dim or flickering lights, a battery warning light and a battery that keeps running low. Test the charging system to confirm the cause before replacing the alternator.
