High Pitched Noise Nissan X-Trail 2003 petrol.
When driving between 50Kph and 60Kph with very light throttle I can hear a slight high pitched noise that disappears when I take my foot off the throttle and reappears as soon as the throttle is lightly touched, the noise is probably always present but at higher speeds road and engine noise would drown it out.
Anyone know what it could be and is it serious