What size speakers do the 4th Gens use? I don't have the Bose system, just the regular four speaker cassette unit. I think that my front speakers are blown because I heard rattling when I play music at higher volume. A friend is offering me some used speakers for a good price, but i want to know what sizes are used in the front and back.

Thanks.

6 1/2s or 6 3/4. If you go to Crutchfield.com you can specify your vehicle and you will see diferent speakers available for your vehicle and their sizes. But Crutchfield prices can be a bit high.

Best regards, tony
96 Maxima and a few bikes

Ok...but Crutchfield list all types of sizes >>
 

Are all four of the speakers round 6.5" units? Or are they different from front to back?

Crutchfield lists stuff from 3.5" to 4"X6" to 6.5"...it's kind of confusing since I just want to replace the size with another of the same size.

yes,
 

They are all 6.5" round. Now go for it.

They are all 6.5 but actually when buying from Crutchfield, you should buy a 6.5S, because the speakers in the MAX are actually 6.75. You can use 6.5, but they are slightly small. This can be fixed with a simple 1\4" plywood trim ring you can cut out to make it fit with no gaps.