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How can I tell which version of Bosch LH Fuel Injection is on my Volvo 240?

Created on 2011-06-17 by Kevin Rutledge, Last Updated on 2018-11-12

There are 4 Variations of Bosch LH-Jetronic on Volvo 240 models.

The easiest way to tell is to look at the MAF sensor.

1982 B21F Bosch LH 1.0 / 2.0

There seems to be a lot of dissagreement on what the version number is on this early system. Some people say it is version 1.0 others say it is 2.0 and yet others say 1983-1984 is version 2.0. Regardless, they were quite rare.

The Bentry Bosch Fuel Injection & Engine Management states that the first LH system on a  Volvo was LH 1 and then LH 2 appeared in 1984 which doesn't really work since there were definite differences between the first 1982 version and the 1983 version.   In this case, they may be referring to the digit after the decimal i.e. 2.1 & 2.2 but that still doesn't account for the 1982 version that was significantly different.

No matter the version number, this was the first one that appears on a Volvo.

MAF sensor Bosch numbers: 0280212001

Aluminum MAF Housing w/ 6 pin plug with trim adjustment.

Usually has giant brass flame trap in outlet end (very unique.)

This system also uses rubber hoses between the fuel rail and the injectors.  

There aren't many parts available for this limited production system.

1983-1984 Bosch LH 2.1

MAF sensor Bosch numbers: 0280212002

Aluminum MAF Housing w/ 6 pin plug with trim adjustment.

1985-1989 Bosch LH 2.2

MAF sensor Bosch numbers: 0280212007, 0986280102

Black Plastic MAF Housing w/ 6 pin plug

1989-1993 Bosch LH 2.4

MAF sensor Bosch numbers: 0280212016, 0986280101

Black Plastic MAF housing w/ 6 pin plug

1990-1993 Bosch LH 3.1

MAF Sensor Bosch numbers: 0280217001

Black Plastic MAF Housing w/ 4 pin plug

These products are linked to this Technical Article

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