Review on Nissan Genuine 999MB AX000 Valve Stem by Matthew Maggot

They say Original but they aren't. I had the ORIGINAL CAPS one of which was left over at the tire store. Genuine Nissan caps (shown side by side in my bad photos) are PLASTIC (OEM P/N: #999MB-SX000) and cost about $12. It's definitely chromed metal. Much harder. They have a small o-ring inside that is not installed very well. I have attached the relevant text. If you find out what four electrons are please let me know. I replaced my "Original Failed Valve Cover" of which there were 3 original Nissan OEM covers with these. Before installing I poured in some "lubricant spray" to avoid possible sticking like another customer did. Please note that they are similar to the original but are made of metal. Let's see how they hold up over time - I check my air every month or two so I keep an eye on corrosion. I gave these 2 stars because of false advertising: they are NOT real and not plastic. Otherwise they look ok.