[x300] Throttle body replacement

X300
1

Just had a call from my dealer saying my new throttle body was in.
This came as news to me, but there would appear to be some kind of
recall service action as they’re replacing the thing for free
despite the warranty running out last January.

Anyone else heard about this? I know the things get cacked up but
thought the service action was just to clean the thing out…–
X308 XJR 1998 Aquamarine
Stratford-upon-Avon, United Kingdom
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

2

In reply to a message from Andrew Thomas sent Thu 17 Jun 2004:

Andrew

Service action S514 was issued to UK dealers in May 2004:-

Model: XK Series N/A vehicles
Model Year: 1997 to 1998
VIN Range: 001036 to 031302

Model: XK Series SC vehicles
Model Year: 1998.75 to 1999
VIN Range: 024695 to 042775

Model: V8 XJ Series N/A vehicles
Model Year: 1998
VIN Range: 812256 to 853935

Model: V8 XJ Series SC vehicles
Model Year: 1998 to 1999
VIN Range: 812256 to 878717

Dear Colleagues
A concern has been identified with the throttle operation on a
number of vehicles in the above VIN range.
Under exceptional circumstances this concern could cause the engine
to cut out, although the engine will
continue to be driven by the road wheels through the transmission
and drive the ancillaries, so there will be no
loss of power steering, brakes, air conditioning, etc. The engine
should restart without difficulty once the vehicle
has come to a complete standstill.

Action to be taken

To aid in the identification of repairs required by vehicle, Table
1 of this Service Action provides a breakdown of
the repair required by model year, model description, and VIN
range.

For those vehicles that require the ECM to be reprogrammed,
Worldwide Diagnostic System (WDS) release
JTP759/31, or later, should be used.

Model Year Model Description VIN Range Repair Required
1997 to 1998 XK Series N/A 001036 to 020734 Reprogram ECM
1998 V8 XJ Series (both N/A and SC) 812256 to 819771 Reprogram ECM
1998 XK Series N/A 020735 to 031302 Replace throttle body
1998.75 to 1999 XK Series (SC) 024695 to 042775 Replace throttle
body
1998 V8 XJ Series N/A only 819772 to 853935 Replace throttle body
1998 to 1999 V8 XJ Series SC only 819772 to 878717 Replace
throttle body

Also:
Jaguar is providing a no-charge Customer Satisfaction Program
(Program Number S514) to owners of 1997 to
1999 model year XK Series vehicles and 1998 to 1999 model year V8
XJ Series vehicles.
Reason for this program
A concern has been identified with the throttle operation on a
number of vehicles that could include your
vehicle. Under exceptional circumstances this concern could cause
the engine to cut out, although the engine
will continue to be driven by the road wheels through the
transmission and drive the ancillaries, so there will be
no loss of power steering, brakes, air conditioning, etc. the
engine should restart without difficulty once the
vehicle has come to a complete standstill.
This concern can be rectified by a modification to the throttle
operation of your vehicle, removing the potential
for this concern to arise. Although it is most unlikely that you
will have experienced any concerns with the
functionality of the throttle in your vehicle, Jaguar have advised
us that the engine management throttle
strategy does not meet expected durability requirements.

Jaguar encourages you to schedule an appointment with your dealer
for your vehicle to be reworked free of
charge.–
Richard '98 XJR
Nottingham, United Kingdom
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

3

That’s interesting.

The old throttle body design had a problem with temperature-related parts
interference that could cause the car to stall at speed.

I have always thought this to be such a potentially dangerous situation that
Jag should have issued a recall, and apparently that’s the case in the UK.

Has anyone heard of a recall in the US? The new TB was introduced before
the model year of my XJ8 so I won’t hear about it.

Dave-----Original Message-----
From: owner-x300@jag-lovers.org [mailto:owner-x300@jag-lovers.org] On Behalf
Of Andrew Thomas
Sent: Thursday, June 17, 2004 8:09 AM
To: x300@jag-lovers.org
Subject: [x300] Throttle body replacement

Just had a call from my dealer saying my new throttle body was in.
This came as news to me, but there would appear to be some kind of
recall service action as they’re replacing the thing for free
despite the warranty running out last January.

Anyone else heard about this? I know the things get cacked up but
thought the service action was just to clean the thing out…

X308 XJR 1998 Aquamarine
Stratford-upon-Avon, United Kingdom

4

In reply to a message from Richard sent Thu 17 Jun 2004:

Thanks Richard.–
X308 XJR 1998 Aquamarine
Stratford-upon-Avon, United Kingdom
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

5

In reply to a message from Richard sent Thu 17 Jun 2004:

I’d like to say a big thanks to Richard for the detailed
information. I have the ‘‘stalling’’ problem on my 98 XJ8 and after
reading the reply … phoned Jaguar. It’s now booked in for a
throttle body replacement next week FOC. Thanks to all for the
helpful information.–
The original message included these comments:

1998 V8 XJ Series N/A only 819772 to 853935 Replace throttle body

–
PeteManley
Dorset, United Kingdom
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

6

Hey that’s great if you live in the UK, in the States the reply we get is
What Throttle Body problem ?----- Original Message -----
From: “PeteManley” blackadder@the-manleys.com
To: x300@jag-lovers.org
Sent: Tuesday, July 20, 2004 8:13 PM
Subject: Re: [x300] Throttle body replacement

In reply to a message from Richard sent Thu 17 Jun 2004:

I’d like to say a big thanks to Richard for the detailed
information. I have the ‘‘stalling’’ problem on my 98 XJ8 and after
reading the reply … phoned Jaguar. It’s now booked in for a
throttle body replacement next week FOC. Thanks to all for the
helpful information.

The original message included these comments:

1998 V8 XJ Series N/A only 819772 to 853935 Replace throttle body

–
PeteManley
Dorset, United Kingdom
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

7

In reply to a message from PeteManley sent Wed 21 Jul 2004:

I popped in to the dealer on Friday to ask for my throttle body to
be replaced and the lady on the service desk said that there were
no service actions outstanding on my car so therefore it couldn’t
be changed. She even showed me the screen that she used which is
driven by a central database. I pointed out that the VIN number of
my car fell slap bang in the middle of the range with the problem
and after checking the service action herself agreed.

Anyway, she agreed to book the car in today and talk to Jaguar
about it. The car has just been brought back to me with a new
throttle body fitted. The service manager said that Jaguar was
having problems and that not all of the records were correct. I
guess it is possible therefore that other cars in the VIN range may
get missed too.–
The original message included these comments:

I’d like to say a big thanks to Richard for the detailed
information. I have the ‘‘stalling’’ problem on my 98 XJ8 and after
reading the reply … phoned Jaguar. It’s now booked in for a
throttle body replacement next week FOC. Thanks to all for the
helpful information.

–
Richard '98 XJR
Nottingham, United Kingdom
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

8

In reply to a message from Richard sent Mon 16 Aug 2004:

My '99 XJR had the stalling problem, and a loss of drive
after deceleration. Both were cured by a replacement
throttle body, but only after the dealer had tried cleaning
the old throttle body without success. It required
multiple returns before Jaguar could be persuaded to
replace the throttle body. I don’t know if it true, but I
was told a replacement costs Jaguar about �800 (possibly
including labour) so I’m not surprised they are reluctant
to voluntarily do the repairs.–
The original message included these comments:

throttle body fitted. The service manager said that Jaguar was
having problems and that not all of the records were correct. I
guess it is possible therefore that other cars in the VIN range may
get missed too.

–
1999 Jaguar XJR8
Hampshire, United Kingdom
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–