2023 Ford Focus Pricing and Specs

It doesn’t take much of a leak to allow enough rainwater into a car to wet the carpets. Given your car is a 2018 model, I’d be surprised if the rubber seals have deteriorated to any great extent. The best bet is to open the doors and hatch and have a close look at the surface of the seals. If there’s a nick or a cut in the rubber, you’ve probably found the problem. But also look for a twig or other piece of rubbish that could be stuck to the rubber and be forming a gap for the water to enter.

If the front floors were wet, the advice would also be to check the drain hose for the air-conditioner, but if it’s the rear floors, it’s almost certainly rainwater. Don’t forget the obvious stuff like a window that looks closed but is actually open a fraction.

There are lots of potential causes for this sort of behaviour, starting with an alternator that is not working properly or even a body computer that is on the way out. But these symptoms are also a classic indication of a very simple problem; a poor earth somewhere on the car. A modern car has multiple earthing points, and if one is a bit sketchy, it can throw the whole car into chaos. Flickering lights and gauges and warning lights on the dashboard are classic indicators of a bad earth. If that’s the case here, an auto electrician should be able to chase down the fault and fix it permanently.

This generation Ford Focus was the first to use electro-hydraulic power-steering. As such, you can’t transpose the rack and pinion hardware from any other model; it would need to be this exact version of the Focus for everything to be compatible.

Once you’ve swapped the hardware, the electronics would also need to be coded and matched to the car’s body computer, as this is what controls the speed-sensitive variations in the steering assistance as well as functions such as the self-parking facility.