Bosch.
Never had issues with the Red Bosch ones I got from Shopdap.com But plugs, I preferred the NGK Ruthenium HX over the Laser Platinum, and Iridium-IX
I have used the 027 coil in a beetle with with points and the coil was getting hot. It was solved by using the 039 coil (Bosch grey).
Had thrown some 2 years ago and still running clean as ever
I found some coils made by denso 673-9303 (i.e. Toyota) on Amazon for around $18 each. They've been troublefree since I put them in about 1K miles ago. My original Audi coils had 81K miles on them. They greatly improved the low speed shift quality and idle smoothness after I put them in.
I replaced the old ignition coil with a Denso one. The car is running great after the replacement.
I pulled all the coils out and one of them was rusted to shit. As I mentioned, I didn't want to pay $460 to get them from MINI, so the parts store supplied me with Bosch coils and they worked well. I ripped the car through the business district I work in ala Grand Tour; all the stuttering problems, hiccups are gone and the car feels way more powerful than before.
VW CC 2.0t Ignition Parts Bosch Audi R8 Ignition Coils for 06E905115F OEM VW Ignition Coil 07K905715G Bosch Spark Plugs for 2.0t Bosch R8 Igntion Coils with Bosch Spark Plug Set Bosch R8 Igntion Coils with NGK Spark Plug Set
Many aftermarket coils are completely out of spec and do not work well, some can even destroy the ECU. OE, Bosch, Temic are all good, I believe Beru is an OE manufacturer as well.
Put in the new coil (Denso best available here off shelf)- and did quick hook up test for spark. NO SPARK at all.
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