Bosch Vacuum Advance Unit 1 237 122 639 – NOS Genuine Part | Mercedes

Description

Original Bosch Vacuum Advance Unit 1 237 122 639 – NOS / New Old Stock

#1147

For sale is an original Bosch Vacuum Advance Unit 1 237 122 639 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 valuable for the professional and authentic restoration and rebuild of classic ignition distributors and classic cars.

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 within the ignition distributor.

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

Product Details

• Manufacturer: Bosch
• Item: Vacuum Advance Unit / Vacuum Adjuster
• Bosch Part Number: 1 237 122 639, 1237122639
• Compatible Bosch Ignition Distributor: 0 237 302 002, 0237302002, 0 237 302 003, 0237302003
• Mercedes Part Number for Ignition Distributor: 000 158 40 18, 0001584018
• Condition: NOS – New Old Stock (unused stock)
• Application: Vacuum-dependent ignition timing adjustment

Compatible Vehicles

0 237 302 002:

Mercedes-Benz 123 Sedan (W123) 280 E (123.033) / M 110.988, M 110.984 / 02.1976 – 11.1985 / 136 kW / 185 HP / 2746 ccm / 6 / Gasoline

Mercedes-Benz S-Class (W116) 280 SE, SEL (116.024, 116.025) / M 110.985 / 08.1972 – 07.1980 / 130 kW / 177 HP / 2746 ccm / 6 / Gasoline

Mercedes-Benz S-Class (W116) 280 SE, SEL (116.024, 116.025) / M 110.983, M 110.985 / 08.1972 – 07.1980 / 136 kW / 185 HP / 2746 ccm / 6 / Gasoline

Vehicle assignment may vary depending on the year of manufacture 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 authentic restoration of historic ignition systems, original Bosch spare parts from earlier production are particularly valuable.

Important Note on Item Condition:

Due to age and storage, sometimes for decades, 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 corrosion.

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

Please refer to the product images and the information on the respective item condition.

Fitment and Use

Before purchasing, please compare the Bosch part number 1 237 122 639 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. An optically similar design is therefore not necessarily interchangeable.

If you have any questions about 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 rebuilds.