There are a lot of threads detailing various noise reduction tactics. I've finally gotten my 2023 M3LR to a good point, so I thought I would summarize what I've done in the hopes that it might simplify the research for someone new to Model 3. I have the original Continental tires (4K miles) at this point, so I can't speak to whether different tires would help even more. I don't hear a lot of tire noise on normal roads. At this point, the car is very quiet at speeds up to 70 or so.. Above 70, there is some low frequency wind noise that is likely the result of poor aerodynamics and unfixable I think.
10 piece Road noise Reduction kit - Seemed to help with noise from many sources and not very expensive at $55
Fender Noise Reduction Kit - Did not come with instructions and I couldn't find any video, but not too tricky to install over plastic fender liners using same clips (although I added a few extras to minimize panel-to-panel vibrations). Again, seemed to have a significant effect on road noise for about $125
Insulation for rear wheel wells - 1" ceramic fiber added underneath panels left and right of rear seat. Seemed to minimize rear wheel well noise for only $27. Driver side pictured below.
Window Wind Noise - as delivered, the car had a significant whistling wind noise at the upper corner of driver's side window at speeds of 45 mph and up. I submitted a service request and Tesla came to my house and changed the door gasket. Noise was worse, so I submitted a second ticket. Second gasket replacement fixed the problem. From what I can see, the gaskets are a bit erratic in shape and the weak point for leaks is this spot.
Frunk and Trunk liners - I looked into these, but it didn't seem like they would make much difference since 2 gaskets now buffer the frunk noise and the rear seat buffers the trunk noise. Maybe someone else has had fantastic results and can share.
Adhesive Sound-dampening - Some people have raved about this, but I can't imagine that it makes that much difference and the work involved (taking doors apart and windows out, etc.) and costs seemed very high to me (taking doors apart, etc.)
Anyway, this summary may be redundant, but I hope it provides a jumping off point for anyone who wants to try to improve their noise situation without spending too much.
10 piece Road noise Reduction kit - Seemed to help with noise from many sources and not very expensive at $55
Fender Noise Reduction Kit - Did not come with instructions and I couldn't find any video, but not too tricky to install over plastic fender liners using same clips (although I added a few extras to minimize panel-to-panel vibrations). Again, seemed to have a significant effect on road noise for about $125
Insulation for rear wheel wells - 1" ceramic fiber added underneath panels left and right of rear seat. Seemed to minimize rear wheel well noise for only $27. Driver side pictured below.
Window Wind Noise - as delivered, the car had a significant whistling wind noise at the upper corner of driver's side window at speeds of 45 mph and up. I submitted a service request and Tesla came to my house and changed the door gasket. Noise was worse, so I submitted a second ticket. Second gasket replacement fixed the problem. From what I can see, the gaskets are a bit erratic in shape and the weak point for leaks is this spot.
Frunk and Trunk liners - I looked into these, but it didn't seem like they would make much difference since 2 gaskets now buffer the frunk noise and the rear seat buffers the trunk noise. Maybe someone else has had fantastic results and can share.
Adhesive Sound-dampening - Some people have raved about this, but I can't imagine that it makes that much difference and the work involved (taking doors apart and windows out, etc.) and costs seemed very high to me (taking doors apart, etc.)
Anyway, this summary may be redundant, but I hope it provides a jumping off point for anyone who wants to try to improve their noise situation without spending too much.