Reddit mentions of Besign Bluetooth 4.1 Car Kit for Handsfree Talking & Music Streaming, Wireless Audio Receiver for Car with 3.5mm AUX Input Port

https://www.amazon.com/gp/aw/d/B01LGKSBFI?psc=1
I use this

https://www.amazon.com/gp/product/B01LGKSBFI/ref=oh_aui_search_asin_title?ie=UTF8&psc=1

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I bought this two years ago and works amazing. pairs automatically and you can play/pause/skip/replay from the circle thingy. saved me hundreds

I'm using one of these in my Subaru. It's not aptx, but I like the big buttons and it matches the silver on the radio perfectly. I had to Jazzy Mod the radio to add a line in. That receiver has only failed me once and it was like -10°F, but the next day it worked fine. I've been waiting to see if the company will update that model to add aptx.

In my past search for cars I just Google the phrases:

[Model name year] repair price -> for the estimated annual repair price, IMHO if you buy CPO or something with less than 40k miles and sell within 3 years you won't be needing anything other than the scheduled maintenance in the manual.

[Model name year] problems -> there are reviews on Edmund, and there is another website whose name I cannot remember with a helpful graph of problem reports for each years, you'll find it it's pretty high up the list

And lastly check out the subreddit for Volvo's.

Volvo's are quality cars and I believe they keep using the same overall engine design for many years with small adjustments each year, so their engines are fairly reliable. Again, just a generalization, you'll need to ascertain this for your model.

As for Bluetooth, I'm not talking about an actual part that you'll need to spend time putting in, but just a handsfree dongle! I'll link you soon.

Ok so:
Besign Bluetooth 4.1 Car Kit Hands-Free Wireless Talking, Music Streaming Dongle With 10W Dual Port 2A USB Charger, Magnetic Mounts, for Car with 3.5mm Aux Input Jack https://www.amazon.com/dp/B01LGKSBFI/ref=cm_sw_r_cp_apa_tJgnzbBB1BHFY

This one plugs into your aux port and usb charger. Starts when you leave it plugged in and start the car. This is the closest you can get to seamless Bluetooth streaming.

Kinivo BTC450 Bluetooth Hands-Free Car Kit for Cars with Aux Input Jack (3.5 mm) - Supports Apt X https://www.amazon.com/dp/B009NLTW60/ref=cm_sw_r_cp_apa_vNgnzbTJV2BQP

This is the more expensive option of the same thing, IDK if it's higher quality or just brand tax.

Mpow Bluetooth Receiver, Streambot Hands-free Car Kits & Wireless Music Adapter for Stereo System https://www.amazon.com/dp/B00MJMV0GU/ref=cm_sw_r_cp_apa_tQgnzbVABGKJM

Completely wireless but you need to recharge it every now and then and turn it on every time.

Nulaxy Wireless In-Car Bluetooth FM Transmitter Radio Adapter Car Kit with 1.44 Inch Display and USB Car Charger https://www.amazon.com/dp/B018E0I01I/ref=cm_sw_r_cp_apa_sRgnzbDHK9FC1

This is what most people use, connects to your phone with Bluetooth and streams the music thru the radio to your car. IMHO the Volvo's you're buying will most likely have an aux port, and the placement of the charging port wouldn't work very well with this device, so I wouldn't recommend it but I'm linking it anyways in case you buy a car without an aux port.

All in all I'd recommend the first link.

My wife and I each have these and they work beautifully.

Besign Bluetooth 4.1 Car Kit for Hands-Free Talking & Music Streaming, Wireless Audio Receiver for Car with 3.5mm AUX Input Port https://www.amazon.com/dp/B01LGKSBFI/ref=cm_sw_r_cp_apa_i_LioqDbFKTH7DC

A Bluetooth to Aux adaptor is $20. [Here's one I found in 2 minutes of looking.](http://www.Besign.com/ Bluetooth 4.1 Car Kit for Hands-Free Talking & Music Streaming, Wireless Audio Receiver for Car with 3.5mm AUX input Port https://www.amazon.com/dp/B01LGKSBFI/ref=cm_sw_r_cp_apa_qPWMBb9Y5E948).

Aux jacks have issues too; have you never used a cable or jack that was scratched and introduced static? The one in my car is terrible.