The seat belt reminder "chime" in my '92 Sentra makes an annoying "ehh--ehh--ehh--ehh" low monotone sound. I asked another Sentra owner if hers did the same thing and she said "yes". Is this the normal audible reminder for this car, or is mine just wearing out? I know where the buzzer is, I just don't know if the unusual sound it makes is original. If so, is there another, more pleasant unit I can replace it with? Thanks.