Bosch Vacuum Advance Unit 1 237 122 373 – NOS original part | Mercedes-Benz M110

Description

Original Bosch vacuum advance unit 1 237 122 373 – NOS / New Old Stock

#1155

For sale is an original Bosch vacuum advance unit 1 237 122 373 from old stock (NOS – New Old Stock).

This vacuum advance unit is an unused original spare part from earlier Bosch production.

The vacuum advance unit is intended for the Bosch ignition distributor 0 237 301 011 (PGFUD 6), which was used, among others, in classic Mercedes-Benz vehicles with the M110 six-cylinder engine.

Original Bosch vacuum advance units are particularly interesting for the professional rebuild and authentic restoration of historical ignition systems and classic cars.

The vacuum advance unit is part 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 is important for maintaining the ignition curve intended by the manufacturer and contributes to smooth engine operation.

Product details

• Manufacturer: Bosch
• Item: Vacuum advance unit
• Bosch part number: 1 237 122 373 / 1237122373
• Matching Bosch ignition distributor: 0 237 301 011
• Bosch distributor type: PGFUD 6
• Mercedes-Benz number of the complete ignition distributor: A 003 158 08 01
• Condition: NOS – New Old Stock (unused warehouse stock)
• Use: Vacuum-dependent ignition timing adjustment
• Application: Classic Mercedes-Benz ignition systems

Vehicle assignment

The Bosch vacuum advance unit 1 237 122 373 is part of the Bosch ignition distributor 0 237 301 011.

This ignition distributor is assigned, among others, to the following Mercedes-Benz series with the M110 six-cylinder engine:

Mercedes-Benz S-Class (W116)

• Engine: M110, 2.8 liter
• Displacement: 2,746 cm³
• Years of construction: depending on the ignition distributor version

Mercedes-Benz 123 series (W123)

• Engine: M110, 2.8 liter
• Displacement: 2,746 cm³
• Years of construction: depending on the ignition distributor version

Mercedes-Benz S-Class (W126)

• Engine: M110, 2.8 liter
• Displacement: 2,746 cm³
• Years of construction: depending on the ignition distributor version

Important: The vehicle series mentioned serve as a guide. Depending on the year of construction, engine, country version, and installed ignition system, different ignition distributors and vacuum advance units may be used.

Please therefore check the full Bosch part number or the number of your existing ignition distributor before purchasing.

NOS – Original spare part from old stock

NOS stands for New Old Stock and refers to unused original spare parts from earlier production.

Original Bosch spare parts from older stock are particularly interesting for the authentic restoration of historical Mercedes-Benz ignition systems.

Important note on item condition:

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 signs of corrosion.

Please note the product images and the information on the respective item condition.

Fitment and use

Please compare the Bosch part number 1 237 122 373 with your existing component before purchasing.

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.

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

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