#1153<\/strong><\/p>\n For sale is an original Bosch vacuum advance unit 1 237 121 607 from old stock (NOS \u2013 New Old Stock)<\/strong>.<\/p>\n This vacuum advance unit is an unused original spare part from earlier Bosch production.<\/p>\n The vacuum advance unit is intended for, among others, classic Porsche 911 and 911 S with 2.7-liter flat-six engines as well as certain Porsche 911 Carrera 3.0 models.<\/p>\n Original Bosch vacuum advance units are particularly interesting for the professional rebuild and authentic restoration of classic Porsche ignition distributors and classic cars.<\/p>\n The vacuum advance unit is part of the ignition timing adjustment and enables a load-dependent adjustment of the ignition timing. In the corresponding Porsche ignition systems, the adjustment mechanism in the ignition distributor is actuated via the applied vacuum.<\/p>\n Correctly functioning vacuum advance is important for maintaining the ignition curve intended by the manufacturer.<\/p>\n Porsche 911 2.7 (G-Model)<\/strong><\/p>\n Porsche 911 S 2.7 (G-Model)<\/strong><\/p>\n Porsche 911 Carrera 3.0<\/strong><\/p>\n Important:<\/strong> Vehicle assignment may vary depending on engine, year of manufacture, country version, and installed Bosch ignition distributor. The listed vehicle data does not represent a general installation approval.<\/p>\n Please check the number of the existing component or ignition distributor before purchasing.<\/p>\n NOS stands for New Old Stock<\/em> and refers to unused original spare parts from earlier production.<\/p>\n Original Bosch spare parts from older stock are particularly interesting for the authentic restoration of historical Porsche ignition systems.<\/p>\n Important note on item condition:<\/strong><\/p>\n Due to age and in some cases decades of storage, both the original packaging, if present, and the item itself may show signs of storage and aging. These include, for example, dust, light scratches, discoloration, or superficial traces of corrosion.<\/p>\n Please note the product images and the information on the respective item condition.<\/p>\n Before purchasing, please compare the Bosch part number 1 237 121 607<\/strong> or the Porsche cross-reference number 911 602 932 00<\/strong> with your existing component.<\/p>\n Vacuum advance units of different Bosch ignition distributors can differ in terms of their mounting, adjustment characteristics, and vacuum curve. A visually similar version is therefore not necessarily interchangeable.<\/p>\n If you have any questions about compatibility or the item, we will be happy to help you.<\/p>\nProduct details<\/h3>\n
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NOS \u2013 original spare part from old stock<\/h3>\n
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