This adapter does work for the Garmin nuvi 660.
However, If You Subscribed to the Traffic Alert, this adapter WILL NOT PICK UP the traffic alerts nor will you even get an icon on your nuvi. There is another fuse in the original adapter that came with your Garmin nuvi that supports the "traffic alert". If your nuvi is still under warranty, Garmin will send you out a repair kit that includes another tip at no charge. They can at their discretion void your warranty if you use another adapter that did not come with your original unit.
Please call 1-800-800-1020 (central time) 8am-7pm technical support. When the "automated person" comes on quickly press 2; then press 1 and you will be placed on hold for the next technician. Garmin 12-Volt Adapter Cable
Compatible Models: Nuvi 5000, 650, 660, 670, 680, 710, 750, 760, 770, 780, 850, 860, 880, StreetPilot c510, c530, c550, c580, Zumo 400, 450, 500, 550
https://buy.garmin.com/shop/shop.do?pID=1371
Works well. OEM part and a fair price. :)
Fits very snugly into car outlet and make sure that you push it in all the way or proper connection will not be made. Likewise, one has to exert some strength to remove adapter from socket. However, does indeed provide full power to Garmin on long trips.
The Garmin StreetPilot C550 already comes with a vehicle power charger. I did not know that when I purchased this one. Don't buy an additional one unless you feel the need for two of them! The one it came with works just fine, so I'll be returning this one.
This is a replacement for my Garmin Nuvi 680. I losted my vehicle DC power adapter with MSN direct receiver. I don't want to spend more money therefore I ordered this one. Even though it's didn't have MSN direct but it does the job to power my 680. - Garmin Accessories - Garmin Nuvi - Garmin 660 - Garmin Nuvi 660'
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