We've got a low frequency noise on our FR-V anything above 40mph - not particularly loud, but certainly audible and should not be there. I initially thought it could be a wheel bearing, but there is no play in the bearings, and no grinding that I would expect when rotating the hub with the wheel off. There is some brake drag though, but I was attributing this to the handbrake shoes on the inner of the hub. Should the rear hub spin totally freely by hand, with no noise at all? I'm beginning to think it is one or both calipers could have partially siezed, the car has done 99k miles and is on new discs and pads on all 4 wheels approx 10k miles ago - done DIY via some very helpful links on here. Brakes are workin absolutely fine in terms of stopping ability, but MPG is lower than expected (always has been on this car) so I'm guessing we have some unwanted resistance. . What I didn't do when replacing the discs and pads was anything to the calipers themselves, other than a clean with brake cleaner and of course push the pistons back to fit the new pads. Presumably if one of both caliper pistons is sticking then a new caliper is required? Any other options? Is this reasonable miles to need it? I will get it into a garage to check, but at approx £120/wheel parts + labour I want to know it definitely needs doing before going down this route. Thanks in advance.