Oops! Posted on was it you. Sorry!
Hi,
Need some help re: above. Car is STI V Type R (99). Speedo indication intermittantly keeps falling off/ not registering. Is this mechanical or electronic type. There are three different connections/wire in to gearbox. Is it something I can cure myself? MOT due soon! THX in adv.

 

i was told a while ago it might be the fuses. Clean all the fuses and change any that seem to have blown and see if that works.

 

Had the same problem for a year now on an STi 5. Very intermittent. Speedo drops to 0 and odometer stops measuring, sometimes lasts a mile or so. Happens once or twice a week....

 

Mine has completely stopped working, but occasionally works when i drive it from cold. It's at the dealer today being fixed, so i'll let you know what the problem was.

Mark.

 

Had this on my STi IV. Speedo failure caused the check engine light to come on. Turned out to be the kph/mph converter gubbins. Replaced and no problems since.

 

Had mine intermittently not work from cold, but when you pressed the trip/milage button it would spring into life.

The garage replaced the transducer (on the gearbox I think), but that had no effect. The garage then "fiddled with the wiring" (their words not mine) and it's been fine since. I thought they were going to have to replace the head unit, but fortunately no need in the end.

Based on the garage's behaviour it would appear there are a number of potential causes, and this might (sadly) be a case of perserverance until they nail it.