J&N part description

21SI 12V 145A Alt

Fits Vehicles

  • Western Star 6900 (1989-1991, 1995)
  • Western Star 5900 (1989-1995)
  • Western Star 4900 (1989-1995)
  • Western Star 4800 (1989-1995)
  • Mack CL (1991-1998)
  • Mack RW (1986-1993)
  • Mack RS (1986-1989)
  • Mack MH (1986-1994)
  • Mack DM (1986-1998)
  • Peterbilt 372 (1991-1994)
  • Peterbilt 377 (1991-1997)
  • Peterbilt 362 (1991-1997)
  • Mack CH (1989-1998)
  • Kenworth C500 (1991-1995)
  • Mack RD (1986-1998)
  • Western Star 3800 (1989-1995)
  • Peterbilt 385 (1997)
  • Peterbilt 375 (1991-1995)
  • Peterbilt 357 (1991-1997)
  • Mack CM (1988-1989)
  • Kenworth T450 (1993-1996)
  • Kenworth T400 (1991-1996)
  • Mack R (1986-1990)
  • Mack MR (1986-1998)
  • Peterbilt 379 (1991-1997)
  • Peterbilt 320 (1991-1997)
  • Peterbilt 378 (1991-1997)
  • Kenworth W900 (1990-1995)
  • Kenworth T800 (1988-1995)
  • Kenworth T600A (1988-1995)

Founded by John Kuechly as an automotive repair shop in Cincinnati, Ohio, in 1954, J&N® has experienced exponential growth to become the industry leader that it is today. At present, J&N is a world-renowned distributor of rotating electric units and parts in every major O.E.M. starter and alternator brand. It also offers the J&N brand of aftermarket parts. J&N carefully selects products to uphold the high quality that its customers expect. It is well-known for its line of world-class alternators, starters, generators, and winch motors. The brand complements these product lines with a comprehensive selection of electrical accessories, lighting, tools, shop supplies, mounting hardware, and electrical solutions products.

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