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alaTest has collected and analyzed 19 reviews of GARMIN TMC GTM 12 FM. The average rating for this product is 4.1/5, compared to an average rating of 4.0/5 for other GPS for all reviews. Reviewers really like the durability and screen. The price and usability are also appreciated. There are some mixed comments about the size, and the reliability and performance get negative comments.

usability, price, screen, durability

performance, reliability

We analyzed user and expert ratings, product age and more factors. Compared to other GPS the GARMIN TMC GTM 12 FM is awarded an overall alaScore™ of 73/100 = Good quality.

Review analysis

(Based on 19 reviews)

User Reviews  

Showing 17 review(s)

Expert Reviews User Reviews


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Showing 1 - 10 of 17 Show Reviews: in English | in other languages (2)

Consumer review (

A little delay in info but better than nothing...


Still, drove all the way from FL to NJ and this device did save me time.

Gives you alternate route options when traffic or construction is ahead

Not real time, if the accident has been there for 15-30 minutes you'll know

Jul, 2008

Consumer review (

Garmin GTM 12 FM TMC Traffic Receiver


it is useful

It works


May, 2008

Consumer review (

Garmin GTM 12 FM TMC Traffic Receiver


took awhile to "learn" major routes in my area1 yr subscription *IS* included w/product

1 yr subscription *IS* included w/product

suction cups are unsightly, imho

Jan, 2008

Consumer review (



A definite if you live in a bigger city that has the FM signals.

This thing work very well. I am getting traffic signals 60 miles away, which is where I work

No traffic signals where I live. Not Garmin's fault though. A little on the high priced side for what it is, but works well

Dec, 2007

Consumer review (

Garmin GTM 12 FM TMC Traffic Receiver


very satisfied

very good buy


Jun, 2007

Consumer review (

Garmin GTM 12 FM TMC Traffic Receiver


Needs more specific setup instructions

Apr, 2007

Consumer review (

Garmin GTM 12 FM TMC Traffic Receiver


The unit sets up completely by itself, just plug it in - doesn't get any easier. When traffic is in your path, the GPS will say "traffic ahead" and offer to re-route you, which works nicely. I am disappointed that it will not work unless the external...

Super-simple setup, great integration with GPS

Will not work without external power, only seems to track freeways and not any major surface streets, works only in selected major cities

Jan, 2007

Consumer review (

Garmin GTM 12 FM TMC Traffic Receiver w/Antenna # 010-00570-01


Save the cash and buy a better radio.Live Traffic is a Farce, But Garmin is GoodPros:Compact and Easy to use.Cons:Supplied data is a farce.

May, 2007

Consumer review (

Live Traffic is a Farce, But Garmin is Good


A reciever is just a reciever.

Compact and Easy to use

Supplied data is a farce

May, 2007

Consumer review (

GTM12 FM TMC Traffic Receiver


Garmin 010-00570-01 GTM12 FM TMC Traffic Receiver is a nice accessory for the Garmin NUVI device. The receiver works in two modes:- View Map (w/o entering a particular address/destination). In this mode Garmin GPS will show traffic patterns of major...

Feb, 2007

Product Specifications

Save drive time, gas, and your sanity by adding traffic services to your compatible Garmin. The GTM 12 is a FM RDS-TMC traffic receiver. It receives digital information (where available) on traffic, road construction and weather-related tie-ups, which your compatible Garmin uses to offer an alternate route. In the U.S., the GTM 12 traffic receiver comes with a 15-month trial subscription to Clear Channel TMC. Traffic services are available only in select cities where RDS-TMC coverage exists.


Country Kits:Europe/North America
Model:GTM 12
Packaged Quantity:1
Product Line:Garmin


CE Product Type:TMC module for GPS receiver

Technical Details

Color of product:Black

Weight & Dimensions