#1148<\/strong><\/p>\n For sale is an original Bosch vacuum advance unit 1 237 122 633 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. Original Bosch vacuum advance units are particularly interesting for the professional and authentic restoration and rebuild of classic ignition distributors and classic cars.<\/p>\n The vacuum advance unit is a component of the ignition timing adjustment and enables a load-dependent adjustment of the ignition timing. The adjustment mechanism in the ignition distributor is actuated via the applied vacuum.<\/p>\n A correctly functioning vacuum advance contributes to optimal engine operation and ignition timing control adapted to the operating conditions.<\/p>\n Mercedes-Benz 123 Sedan (W123) 250 (123.026) \/ <\/strong><\/span>M 123.921 \/ <\/span>02.1976 – 10.1979 \/ <\/span>95 kW \/ 129 hp \/ <\/span>2525 ccm \/ <\/span>6 \/ <\/span>Gasoline<\/span><\/p>\n Vehicle compatibility may vary depending on the model year and country version. Please check the part number of the installed Bosch ignition distributor before purchasing.<\/p>\n NOS stands for New Old Stock<\/em> and refers to unused original parts from older inventories.<\/p>\n Especially for the authentic restoration of historic ignition systems, original Bosch spare parts from earlier production are particularly interesting.<\/p>\n Important Note on Item Condition:<\/strong><\/p>\n Due to age and storage, which may have lasted 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 marks.<\/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 regarding the respective item condition.<\/p>\n Before purchasing, please compare the Bosch part number 1 237 122 633<\/strong> and the number of your existing ignition distributor with the specifications listed above.<\/p>\n The vacuum advance units of different Bosch ignition distributors can vary in terms of their mounting, adjustment characteristics, and vacuum curve. A visually similar design is therefore not necessarily interchangeable.<\/p>\n If you have any questions regarding compatibility or the item, we will be happy to assist you.<\/p>\nProduct Details<\/h3>\n
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Compatible Vehicles<\/h3>\n
NOS \u2013 Original Spare Part from Old Stock<\/h3>\n
Fitment and Application<\/h3>\n