Banahan received a three-week ban on Tuesday after he was sent off for a dangerous tackle during last weekend's Premiership clash against Leicester.
Mears was cited for punching in the same game and landed a two-week suspension.
Both appeals were heard by Gareth Rees QC, the Rugby Football Union announced, with centre Banahan remaining sidelined until December 24 and hooker Mears being able to return seven days earlier.
London Irish player Chris Hala'Ufia, meanwhile, appealed his five-week ban imposed after he was red-carded for a tip tackle against London Welsh last Saturday.
A decision on that appeal is expected on Friday.
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
$29.99
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.
