One problem related to air brake antilock control unit/module has been reported for the 1996 Acura RL. The most recently reported issues are listed below.
2 weeks after purchasing this previously-owned Rl, I heard a squealing noise that I thought was coming from the a/c and reported it to my dealer who couldn't find any problem. The next time I heard this noise my windows were down and the noise was so loud, it echoed off surrounding buildings. I hit my brakes to pull over and investigate and the noise stopped. Reported to dealer but they couldn't find any problem. This noise still pops up from time to time, but goes away when brakes are applied. Noise is a squealing/hissing sound that eminates from the abs area under my hood next to the firewall on the passenger side, abs lights haven't illuminated during the evet at any time, yet.