MERITOR WABCO IS RECALLING 4,520 QUICK RELEASE VALVES (QRV) MANUFACTURED BY HALDEX BRAKE PRODUCTS FROM MAY 27 TO OCTOBER 15, 2008, AND BEAR CORRESPONDING PRODUCTION DATE CODES OF 148 THROUGH 289. THE AFFECTED VALVES WERE LABELED WITH THE FOLLOWING MERITOR WABCO P/NOS. 9738990110, 9738990030, 9340990100, AND 9340990200 AND DISTRIBUTED TO CERTAIN VEHICLE MANUFACTURERS. THE RUBBER DIAPHRAGM INSIDE THE QRV MAY EXPERIENCE DELAMINATION RESULTING IN SIGNIFICANT LEVELS OF AIR PRESSURE LEAKAGE PAST AND/OR THROUGH THE DIAPHRAGM, OR THE DEVELOPMENT OF A BUBBLE IN THE DIAPHRAGM WHICH MAY TRAP AIR PRESSURE IN THE VALVE AND NOT ALLOW THE SERVICE OR PARKING BRAKES TO RELEASE.