Bosch Vacuum Advance Unit 1 237 122 633 – NOS Original Part | Mercedes

Description

Original Bosch Vacuum Advance Unit 1 237 122 633 – NOS / New Old Stock

#1148

For sale is an original Bosch vacuum advance unit 1 237 122 633 from old stock (NOS – New Old Stock).

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.

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.

A correctly functioning vacuum advance contributes to optimal engine operation and ignition timing control adapted to the operating conditions.

Product Details

• Manufacturer: Bosch
• Item: Vacuum Advance Unit / Vacuum Adjuster
• Bosch Part Number: 1 237 122 633, 1237122633
• Matching Bosch Ignition Distributor: 0 231 187 004
• Mercedes Part Number for the Ignition Distributor: 000 158 41 18, 0001584118
• Condition: NOS – New Old Stock (unused stock item)
• Application: Vacuum-dependent Ignition Timing Adjustment

Compatible Vehicles

Mercedes-Benz 123 Sedan (W123) 250 (123.026) / M 123.921 / 02.1976 – 10.1979 / 95 kW / 129 hp / 2525 ccm / 6 / Gasoline

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.

NOS – Original Spare Part from Old Stock

NOS stands for New Old Stock and refers to unused original parts from older inventories.

Especially for the authentic restoration of historic ignition systems, original Bosch spare parts from earlier production are particularly interesting.

Important Note on Item Condition:

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.

These characteristics can occur despite the unused condition and are not uncommon for historic NOS spare parts.

Please observe the product images and the information regarding the respective item condition.

Fitment and Application

Before purchasing, please compare the Bosch part number 1 237 122 633 and the number of your existing ignition distributor with the specifications listed above.

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.

If you have any questions regarding compatibility or the item, we will be happy to assist you.

Radspieler Classic – Your specialist for classic Bosch spare parts, classic car technology, and professional ignition distributor rebuild.