Emissions - System Type Identification
91jaguar01
SECTION: 12
No: 25
XJ-S ENGINE NUMBER SUFFIX
Model: XJ-S Date: MARCH, 1991
KEY POINTS: IDENTIFICATION OF EMISSION SYSTEM TYPE
From Engine Number 8S72157SA, the last letter of the engine number is used to identify the emission system type.
On engines prior to the above number, the last letter identifies the grade of piston.
NOTE: USA specification vehicles have type "A" emission systems.