Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Emission Control Systems: Application and ID


If there are any problems with the identification of the model, year, country or engine designation, see "V.I.N. AND ENGINE CODE IDENTIFICATION" for positive I.D.. V.I.N. and Engine Code Identification
For engine system I.D. (fuel, ignition system etc.) see "Engine ID"



MODEL 944 Turbo:

ENGINE DESIGNATION M44/51
DISPLACEMENT 2.5L (2479cc or 151.3 cu.in.)
CYLINDERS Inline 4
FUEL CONTROL SYSTEM Bosch L-Jetronic
DEVICES AND SYSTEMS:
ECS Evaporative Control System
OXY Oxygen Sensor
PCV Positive Crankcase Ventilation
TWC Three-Way Catalytic Converter