#1146<\/strong><\/p>\n For sale is an original Bosch Vacuum Advance Unit 1 237 122 753 from old stock (NOS \u2013 New Old Stock)<\/strong>.<\/p>\n This vacuum advance unit is an unused original Bosch spare part from earlier production. Original Bosch vacuum advance units are particularly interesting for the professional rebuild and authentic restoration of classic ignition distributors and classic cars.<\/p>\n The vacuum advance unit is part of the ignition timing adjustment system and enables load-dependent adjustment of the ignition timing. The applied vacuum actuates the adjustment mechanism in the ignition distributor.<\/p>\n A correctly functioning vacuum adjustment contributes to smooth engine operation and optimal adaptation of the ignition timing to the respective operating conditions.<\/p>\n NOS stands for New Old Stock<\/em> and refers to unused original spare parts from earlier production.<\/p>\n Especially for the authentic restoration of historic ignition systems, original Bosch spare parts from older stock are particularly interesting.<\/p>\n Important note on item condition:<\/strong><\/p>\n Due to age and storage, sometimes for decades, both the original packaging, if available, and the item itself may show signs of storage and aging. These include, for example, dust, light scratches, discoloration, or superficial corrosion.<\/p>\n These characteristics can occur despite the unused condition and are not uncommon for historic NOS spare parts.<\/p>\n Please observe the product images and the information on the respective item condition.<\/p>\n Before purchasing, please compare the specified Bosch part number 1 237 122 753<\/strong> with the part number of your existing vacuum advance unit.<\/p>\n Vacuum advance units from different Bosch ignition distributors can vary in terms of their mounting, adjustment characteristics, and vacuum curve. An optically similar design is therefore not necessarily interchangeable.<\/p>\n If you have questions regarding compatibility or the item, we will be happy to assist you.<\/p>\nProduct Details<\/h3>\n
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NOS \u2013 Original Spare Part from Old Stock<\/h3>\n
Fitment and Use<\/h3>\n