Metalnerd Serrated Alternator Pulley Bit Set (A4)(A5)

OEM Number: MN3400 Manufacturer Number: MN3400

$29.95

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IMPROVED! This specialty 33 spline bit (official tool No. 3400) is supplied with a 17 mm hex body for use in your box wrench. Applications include MK-4 Golf®/Jetta®/New Beetle® alternators freewheeling pulley hubs. NEW KIT includes new special compact M10 triple square 12 point bit and the T50 6 lobe bit that are used to reach down the center of the serrated bit and are EXTRA SHORT to work with the engine in the car in most applications.

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IMPROVED! This specialty 33 spline bit (official tool No. 3400) is supplied with a 17 mm hex body for use in your box wrench. Applications include MK-4 Golf®/Jetta®/New Beetle® alternators freewheeling pulley hubs. NEW KIT includes new special compact M10 triple square 12 point bit and the T50 6 lobe bit that are used to reach down the center of the serrated bit and are EXTRA SHORT to work with the engine in the car in most applications.

Not for impact tool usage.

Volkswagen
  • Beetle TDI w/ 2.0L CJAA Engine (2013-2014)
  • Beetle TDI w/ 2.0L CVCA Engine (2015)
  • Golf SportWagen TDI w/ 2.0L CRUA Engine (2015)
  • Golf TDI Mk6 w/ 2.0 CJAA Engine (2010-2014)
  • Golf TDI Mk7 w/ 2.0 CRUA Engine (2015)
  • Golf TDI MkIV (A4 chassis) w/ ALH Engine (1999-2003)
  • Golf TDI MkIV (A4 chassis) w/ BEW Engine (2004-2006)
  • Jetta TDI Mk6 w/ 2.0 CJAA Engine (2011-2014)
  • Jetta TDI Mk6 w/ 2.0 EA288 CVCA Engine (2015)
  • Jetta TDI MkIV (A4 chassis) w/ ALH Engine (1999-2003)
  • Jetta TDI MkIV (A4 chassis) w/ BEW Engine (2004-2005)
  • Jetta TDI MkV (A5 chassis) w/ 1.9 BRM Engine (2005-2006)
  • Jetta TDI MkV (A5 chassis) w/ 2.0 CBEA/CJAA Engine (2009-2010)
  • Jetta Wagon TDI (A4 chassis) w/ ALH Engine (2002-2003)
  • Jetta Wagon TDI (A4 chassis) w/ BEW Engine (2004-2006)
  • New Beetle TDI (A4 chassis) w/ ALH Engine (1998-2003)
  • New Beetle TDI (A4 chassis) w/ BEW Engine (2004-2006)
  • Passat TDI (NMS Chassis) w/ CKRA Engine (2012-2014)
  • Passat TDI (NMS Chassis) w/ CVCA Engine (2015)
  • Sportwagen TDI w/ 2.0L CBEA/CJAA Engine (2009-2014)

Frequently Asked Questions

For ALH engines we recommend the Metalnerd version because it is possible (though hard) to replace the pulley with the alternator still in the car.
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What our customers say...

Works EXACTLY as advertised. There was a little card in the package to remind you which way to turn what. Peek into the pulley to see which bit you need, and away you go! I was able to use this and change out my pulley with the generator still mounted in my 2006 VW New Beetle. My hint is to tap the bit into the shaft to fully seat the entire enterprise before you spin the pulley off. The pulley is on there good, so a little PB Blaster, and a fair amount of grunt are required. Once the pulley/hex body spins a couple of turns, it will back the bit out of the shaft. I was able to spin the pulley off by hand after that. Worth every penny!

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This works great, and saves you from removing the alternator. If you're belt tensioner breaks...this will fix the alternator clutch, which is why it broke in the first place.

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Necessary for alternator pulley replacement. Quality tools.

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Awesome service

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