While Bluetooth is certainly getting better, it still can't compare to a wired connection.
When you turn the Bluetooth signal into an FM signal you are further limited to the restricted frequency response and dynamic range of the FM band.
There are many decent head units available that have USB or AUX inputs that probably don't cost much more than what you have already wasted.
Check Crutchfield.com for some ideas
While this is a nice idea when doable, and nice when you can install one. some vehicles are stuck with the factory head unit at minimum. I own such a car. 1999 Ford Taurus SE wagon. My head unit also has built in Electronic Automatic Temperature Control. No installation kit exists for this car, the factory head unit is THE only option. Some of us still need to know which devices like this are somewhat decent. Just some thoughts.
Problem 1: EATC (Electronic Automatic Temperature Control). Problem 2, the climate control switchgear is in the same radio module (if this car had manual knob climate controls instead, there's an installation kit for a DIN Radio). Which leads to Problem 3, there is no aftermarket radio installable or installation kit short of a wholesale conversion to manual climate control, and the radio module is not the only thing necessary to do so. The 1998-1999 CD changer for this car, happens to be very hard to find, as is the bezel to mount it, it's only used on 1998-1999 Tauruses/Sables/Continentals only. Bodyblue, your 2000 up Taurus does not have this problem, much easier to install aftermarket audio in. As Ford did some major dashboard changes with the major facelift. Some information to know.
I use this one in an 04 Dodge Ram works greatThis gets good reviews ...
Nulaxy Wireless in-Car Bluetooth FM Transmitter Radio Adapter
Granted, you'll be limited to FM quality, but a cassette adapter wouldn't be much better.
I figured it was the EATC that was the problem.
I was lucky in that mine came with CD player. I just had new speakers installed for a bit of an upgrade.
Yours did, in 1999 no CD, unless you bought that changer. A major improvement in your generation on how climate control, and infotainment systems were addressed. Which should have been done by 1998. Ford on these aspects, with these cars were behind the curve. Many cars by 1996-1999 had in dash CD or in dash CD/Cassette as commonly fitted. EATC is indeed the problem, if the car was manual climate control, no issues, the installation kit for those is a proven, works well item, many of those cars with manual systems, got audio upgrades when owners desired them. And successfully.
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The changer was in the dash? I have seen the changers in the consoles on models with the floor mounted shifter and console. I like my years of Taurus and before your gen, but Ford went to crazy with the oval theme in that gen.
I was actually at a Lincoln dealer looking at MKCs when, much to my salespersons dismay I saw the Taurus on the used side. I told my wife the night before that I was going to get the MIC if I could get it for 38K out the door.......she laughed her ass off when I came home in the Taurus this Aug. I just could not write that check. I have had more fun with the Ford than a lot of sports cars I have had. In 03 they added double door seals all around the doors to make it quieter....but they squeaked like hell til I cleaned and lubed them.