These fit over the top of the dash-top air vents on pre-TDCi Defenders to help clear the side windows – a perennial Defender problem.

Removing the old screws is the main problem – to get to them, you either need an angled driver or a very-small-handled Phillips screwdriver. This obviously means that lining up the new ones isn’t that easy, either, but you should still be able to get the job done in less than 10 minutes.

Having the demister fitted must affect the front screen demist time, but doesn’t delay it noticeably. There are a couple of ‘dead’ areas at the bottom of the screen where the plastic strengtheners obstruct the airflow on to the front screen, but these soon clear and the side windows start to clear when the windscreen is about half clear, starting from a small point and working outwards.

Weirdly, it doesn’t feel like much air is coming through the side but, once demisted, the side windows tend to stay clear with just the airflow from driving or with fan assistance, if it’s particularly cold.

They have a crinkled finish, similar to the factory dash and they don’t interfere with visibility through the front screen.

Verdict: Clearly good.

From: Defender Demister