I have a '12 Accord. The emergency brake lever on the rear calipers has rust/ corrosion between it and the caliper body. ( the wife does not exercise the e brake). I have pulled the boot back and shot it with WDn40 and worked it but ta does not last. The lever appears to be held on with a single nut. Is it as simple as it seems to remove the lever or does the caliper need dis-assembly?

 

The lever might come off easily, but probably won't help. WD-40 will evaporate quickly, it's not very good for long-term lubrication.

I'd try to work some grease into that seal. But with the shaft corrosion I'd give this a 50/50 chance of improving. I'd give it a try, but also start looking for calipers. While you're there, check out the cables for operating free & smooth.

And, we don't use the DIY section for questions like this. We try to use it for complete write-ups of various jobs. I'm going to move this to General Tech where more people will see it & chime in.