My Range Rover has started dropping at the rear overnight, and while it levels out once I start it, this is clearly getting worse and I don't want to ignore it. I'm fairly sure it's the air springs or a strut, but I've heard it could also be a valve block or a height sensor, and I don't want to replace the wrong thing. I've been looking into Genuine Range Rover air spring replacement in Dubai, but I want to know what's actually likely before I commit to anything. Has anyone had the rear end drop and what did it turn out to be? Also, should I be replacing both sides at once even if only one is leaking, or is that just something garages say? I'd rather do it once properly than pay twice.