NHTSA complaint: 2006 HYUNDAI SONATA — SUSPENSION:REAR
1. REAR PASSENGER SIDE REPEAT RATTLING THUMPING NOISE IN SUSPENSION AT SPEEDS BELOW 40 MPH CAUSING DISTURBANCE AND AGITATION TO CABIN DRIVER OR PASSENGERS 2. REAR PASSENGER SIDE DRONING-HUMMING ECHO NOISE MORE NOTICEABLE OVER 40 MPH AND AT STEADY MAINTAINED SPEED CAUSING DISTURBANCE AND AGITATION TO CABIN DRIVER OR PASSENGERS 3. SLOSHING NOISE OF GASOLINE IN GAS TANK AFTER THE GAS TANK IS FILLED AND A GRINDING NOISE WHEN THE BRAKES ARE DEPRESSED IN AND AROUND THE GAS TANK AREA AFTER THE GAS TANK IS FILLED CAUSING DISTURBANCE AND AGITATION TO CABIN DRIVER OR PASSENGERS. *NM
National Highway Traffic Safety Administration — Office of Defects Investigation