Bosch VW Starter - 12 Volt - Manual Transmissions - New

Bosch VW Starter - 12 Volt - Manual Transmissions - New
Part Number: SR15N
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$259.95 $233.95
Fits your vehicle This product was made to fit the stock
Modified Fit :
Does not fit This product does not fit the stock
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Bosch 12 Volt Starter for Classic Volkswagens

  • This Starter Does Not Have the "Catch" for the D-Bolt
  • Installation Will Require Two People or You Will Have to Grind Down the Housing to Work with the D Bolt
  • We Have Several Other Options that Work with the D Bolt Like the OE Casting P/N SR15NEC or 111911023
  • 100% Brand New 12 Volt Starter
  • High Quality Bosch Manufactured
  • Fits most 12 Volt, Manual Transmission VWs
  • Only works with Vehicles with a 12 Volt Flywheel - See Notes Below

This brand new 12 Volt charger is made by Bosch and the stock replacement for 1967-1977 Beetle, 1971-1979 Super Beetle, 1967-1974 Karmann Ghia, 1967-1975 Bus, 1967-1973 Type 3. This starter is compatible with manual transmissions when using a 12 volt, 200 millimeter flywheel. These Bosch starters are the finest starters on the market. This is a brand new starter, it is not re-built, and no core charge required.

If you are in the process of converting a 1966 or earlier Volkswagen to a 12 Volt vehicle, DO NOT change your starter to a 12 volt starter unless you know for certain you have a 12 volt flywheel.

Only swap to a 12 Volt starter if you have swapped out your flywheel to a 12 Volt, 200mm flywheel or if you have changed the engine in your original 6 Volt car to an engine with a 12 Volt flywheel.

If you are installing a 12 Volt starter in a transmission from a 6 Volt car, you will need the conversion starter bushing: Part #: 4027

JBugs staff member Sam.

Our Expert's Take:

If you absolutely insist that you have a "Bosch" starter, then this is the starter to get. This starter is made in China for Bosch. We have other options that perform just as well, if not better, and they have the correct casting to work with the OE D bolt. To make this work correctly, the D bolt tab should be ground, cut or milled down to allow a D bolt to key into it. If you insist on a Bosch starter, this is the way to go. Otherwise, the other options cost less, are easier to install, and will perform just as well. If your starter isn't working, make sure you have a good battery and the cables (the positive cable, the negative ground to chassis cable and the transmission to chassis ground strap) are in good condition. Additionally, make sure the wire from your ignition switch to the starter is not disconnected or corroded and the ignition switch is working properly.

California Prop 65 Warning: Cancer and Reproductive Harm
Please Note:The information listed below is for stock, unmodified VW's manufactured for sale in the US. VW's are commonly modified and very often parts from another year VW may have been installed on your car. California Pacific JBugs is not responsible for any errors if your car has been modified in any way.
VW Beetle
1954 - 1977
1954 - 1963
1964 - 1977
1954 - 1970
VW Super Beetle
1971 - 1975
1971 - 1979
VW Karmann Ghia
1956 - 1974
1957 - 1974
VW Type II (Bus)
1955 - 1975
Single Cab
1955 - 1975
Double Cab
1958 - 1975
VW Type 3
1962 - 1973
1962 - 1973
1966 - 1973
VW Thing
1973 - 1974

Upgrading 6 Volt to 12 Volt electrical systems:

Keeping a 6 volt Starter.

When upgrading from a 6 volt system to a 12 volt system, contrary to popular belief, the 6 volt starter can be retained, meaning it is not a requirement to install a 12 volt starter.The stock 6 volt starter & 180mm flywheel will work on a 12 volt system.The result is an engine that will spin twice as fast during starting, making it mucheasier/faster to start your engine!

When using a 6 volt starter on a 12 volt system, it is important to only use it in shortbursts- meaning if the engine is not starting right away, do not continuously run the starter, give it a break! 5 to 10 seconds should be PLENTY of time to start an engine when a 6 volt starter is used on a 12 volt system.

Switching out for a 12 volt Starter.

If you do decide to remove your 6 volt starter, you will also need to remove your 180 mm (known as a 6 volt) flywheel, as the number of teeth are different making them incompatible with a 12 volt starter. This does lead to other hurdles.

A 12 volt flywheel will not fit 1100cc (25 horse), 1200cc (36 horse) or 1200cc (40 horse) engine directly. The mating surface of the flywheel is different.The 12 volt flywheel diameter is larger than a 6 volt, and may not fit inside of the bell housing of the 6 volt era transmission.This means you will need to grind the bellhousing out in various locations to make room for the larger flywheel. Furthermore,when installing the new flywheel, it is IMPERATIVE that the end play be set, or fatal damage can occur to the engine block. An advantage to the 12 volt flywheel, is that it does require the use of a larger clutch disc and plate, which can allow better grip for performance applications. This does mean of course, that the clutch and pressure plate also need be replaced when exchanging the 6 volt starter out for the 12 volt starter.

So what's the right choice?

Obviously it is much cheaper and simpler to simply retain the 6 volt starter, however in racing applications where clutch grip is a question, the 12 volt starter may be the way to go.If you are changing 6v Starter to a 12v Starter you would need the conversion bushing.


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