Same! Get the lasfit error free - https://smile.amazon.com/dp/B07KXSTLQQ/ref=cm_sw_r_cp_api_i_KS21MSM18FC34Q21BHB6?_encoding=UTF8&psc=1

Be careful, hyper flash is common when switching indicator bulbs from halogen to LED. It can confuse the car. Make sure they have built in resistors to reduce the likelihood of hyper flash.

According to AutoZone, the 2015 Civic Sport Coupe should use bulb type 7443 (amber) in the front, and bulb type 7440 (amber) in the rear. I also cross referenced with the 2015 Civic manual, which I've sourced below, to help with accuracy.

This Amazon link should help you get started. Be sure the numbers match and the color is amber. Don't worry about letters like NA, ALL, or NALL, the number matters most.

https://www.amazon.com/s?k=7440+amber+led+blinker+resistor&crid=2WCFDEPT1M3OX&sprefix=7440+amber+led+blinker+resistor%2Caps%2C98&ref=nb_sb_noss

If that's too much, I've gone ahead and made it even easier for you. Just buy these. Not cheap because the tech is a little complicated, but I think it has a good chance of working.

Front:

https://www.amazon.com/LASFIT-Resistor-Upgraded-Intelligent-Temperature/dp/B07KXSTLQQ/ref=sr_1_9?crid=3UC7PHS94TOUK&keywords=7443+amber+led+resistor&qid=1687632845&sprefix=7443+amber+led+resistor%2Caps%2C110&sr=8-9

Rear:

https://www.amazon.com/OXILAM-Yellow-Resistor-Blinker-Replacement/dp/B07Q8RZRZV/ref=sr_1_7?crid=3GM1TXZAJIFT2&keywords=7444na+amber+led+blinker+resistor&qid=1687632200&sprefix=7444na+amber+led+blinker+resistor%2Caps%2C78&sr=8-7

Source:

https://cdn.dealereprocess.org/cdn/servicemanuals/honda/2015-civic.pdf (pgs 383-385)