Date of issue 12/02 Amended 07/03 Bulletin Number 303-S498 Page 1 of 11
V8 XJ Series/XK
1999 MY XK8 Range
1999 MY V8 XJ Series
“Engine Fail Safe” Displayed –
Replace Throttle Body – Normally Aspirated
Vehicles Only – Service Action S498
As a result of investigations into throttle body failures, it has been revealed that a restriction of
performance to the engine control system can potentially occur due to a manufacturing issue with
one of the throttle body components. This will result in the Malfunction Indicator Lamp (MIL)
being illuminated and the message ‘Engine Fail Safe’ being displayed on the message center.
On all 1999 XK8 and normally aspirated XJ8/VDP vehicles within the above VIN ranges, check
the date code on the throttle body, at the next service opportunity.
If the date code is within the range 10T5 to 11T25, inclusive, replace the throttle body as
described in the procedure on the next page.
If ‘Engine Fail Safe’ is displayed on the message center after the throttle body has been replaced,
please refer to Technical Bulletin 303-58.
Remove and destroy Bulletin 303-S498, dated 12/02.
Replace with this Bulletin.
Redundant warranty information has been removed.