Bosch Vacuum Advance Unit 1 237 122 381 – NOS original part | Mercedes-Benz

Description

Original Bosch vacuum advance unit 1 237 122 381 – NOS / New Old Stock

#1154

For sale is an original Bosch vacuum advance unit 1 237 122 381 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 listed, among others, in connection with the Bosch ignition distributor 0 237 401 012, which was used in various classic Mercedes-Benz vehicles with the M116 V8 engine. The exact assignment must be verified based on the respective ignition distributor version.

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

The vacuum advance unit is part of the ignition timing adjustment and enables vacuum-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 advance curve intended by the manufacturer.

Product details

• Manufacturer: Bosch
• Item: vacuum advance unit / vacuum adjuster
• Bosch part number: 1 237 122 381 / 1237122381
• Bosch short number: 07202
• Ignition distributor assignment according to dealer catalog: 0 237 401 012 (to be checked before installation)
• Condition: NOS – New Old Stock (unused warehouse stock)
• Use: Vacuum-dependent ignition timing adjustment
• Application: Classic Bosch ignition systems

Vehicle assignment

The Bosch ignition distributor 0 237 401 012 was used in the following Mercedes-Benz vehicles, among others:

Mercedes-Benz 380 SL (R107)

• Engine: M116, 3.8 liter V8
• Years of construction: 1981–1982
• Version: USA

Mercedes-Benz 380 SEL (W126)

• Engine: M116, 3.8 liter V8
• Model year: 1982
• Version: USA

Mercedes-Benz 380 SEC (C126)

• Engine: M116, 3.8 liter V8
• Model year: 1982
• Version: USA

The vehicle information refers to the mentioned ignition distributor. A direct installation approval for the vacuum advance unit cannot be derived from this.

Please compare the full Bosch part number and check the required vacuum advance curve 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 storage that sometimes spans 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 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 1 237 122 381 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 advance 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.