1994 Vauxhall Omega CDX from UK and Ireland - Comments

The only problem I have had is that the speedo has just started to go erratic for no obvious reason.

I am trying to rectify the fault myself

but finding it very difficult to pinpoint the cause, as the vauxhall dealership said it could be an electrical fault on anything, but didn't think it was the speedo head.

I have been told that there is a sensor on the differential, but haynes manual very brief. can any one help to rectify without costing a fortune.

Any replies to e mail Dave at dbnw42829@blueyonder.co.uk.

Apart from the speedo problem I like the car for its exterior looks.

The inside is comfy and relaxing on short and long journeys.

The performance is ample to me and tows well which is why I bought it in the first place.

The only thing that worries me is the cost of repairs. and how I get my speedo problem sorted out.

My overall opinion of the car is great.

Glad you like the omega cdx, I was looking for a cheap cdx, but ended up with a nice gls 1999 on a T for 5K. At 88K miles on the clock I wasn't too bothered as only 1 previous fleet owner with full service history. Drives like a dream. As for your speedo problem, I guess the speedo is electronic in which case erratic behaviour could be a sensor or wiring. Does it affect the cruise control? If not then maybe its the dial that's faulty or cable in the back of it? Mine's a 2L 16V and auto, have you noticed that yours sits smoother when still in neutral than in drive with brakes on? Must be transmission noise... Also I had a new VDO cd radio fitted and now my trafficmaster doesn't work... I don't know about running costs yet or services, I have my fingers crossed and intend to keep things changed as often as poss such as oil and fluids. I am still awaiting service history as I don't know if the auto transmission fluid needs changing. Anyway I'm at simon@svpworld.com if you wish to discuss things..

I have a '98 Omega CDX 2.5 V6 auto. I was also considering having the transmission fluid changed as mine has done 70,000 miles. Apparently, it's not part of Vauxhall's standard service plan. The Haynes manual recommends that the fluid be changed around now, but a lot of people advise against it unless you're having problems. I've heard that the fluid should always be changed as a precautionary measure. I've even heard that if you go beyond 50,000 miles, then you've passed the point of no return as changing the fluid could disturb particles and cause problems. If I do get it changed, I think I'll go to a Vauxhall dealer and pay by credit card so that I have some protection if things go wrong later. Has anyone else had their fluid changed? Did you notice any difference?

I have an Omega GLS automatic and have just started to experience the same fault with the rev counter it goes erratic bouncing all over the place for no reason I can see. I bought a haynes manual and it briefly mentions a speed sensor on the drive shaft, but as yet I can't pin it down. It gets very annoying and makes me doubt the reliability of the car I also don't want to paid a dealership tons of money in man hours to be told they can't find anything wrong (which has already happened to me with a fault crank shaft sensor. When the diagnostics check kept referring to a faulty cam sensor which I had had changed twice!!!)

I have had my Omega for 7 years and it has been extremely reliable apart from a few faults. 1) Alternator over voltage stopped the auto transmission from changing gear:- replaced alternator. Cam sensor replaced due to difficulty starting and unable to idle. Present fault with uneven idling, can even stall. Looks to be a common fault with the idle valve. Clean it or replace it.

These cars are so cheap to buy after 1 year's depreciation. A lot of car for your money.

I have a 1996 Omega 2.0 automatic and have just started having the engine stalling when idling. Diagnosis is that the crank shaft sensor is broken and hence needs replacing at a cost of around £200. Hopefully that will solve the problem. A friend of mine had a 1996 2.0 16V Vectra that had problems of this nature and has still not been resolved. He's had two new cam shaft sensors and two new crank shaft sensors still with no joy. I don't know if they have the same engine, but the likelihood is high!

I wrote the comment dated 13th July 2002 about having my transmission fluid changed on my 2.5 CDX V6.

As a follow up, I did have the fluid changed by a Vauxhall dealer shortly after I wrote that comment (cost about £70 I think). I didn't notice any difference (was fine before hand anyway). I sold the car to my sister two years ago. She is still driving it with no problems. I don't regret having the fluid changed as it may now be preventing problems from occurring (you wouldn't notice any difference when you change your engine oil either!).

I owned the car for two years and spent about £900 in maintenance over that period. I was very happy with the car and very much regret selling it. The only time it let me down was a flat battery due to faulty alternator. Replaced alternator and no further problems.