Denso iridium are great for turbo cars
NGK are also good, but in experience denso iridium works better when running more than 1 bar of presseure
Pros: great for turbo cars
Vehicle:
Audi A4
Best Spark plug for Audi A4
Bosch F5DP0R on a T3/T4 50 trim at 25psi daily. Love it.
Pros: love it, reliable
Vehicle:
Audi A4
Part number: F5DP0R
I went to the dyno today and ended up with some pretty good #'s 321HP 304TQ Car was ran on SPS3 settings boost 9 timing 9 with Sunoco gt100 fuel. Temperature was mid 70's My car: 2003 A4 1.8t quattro ATP/Revo GTRS ATP Manifold Ecode Front Mount Intercooler Ecode Test Pipe Neuspeed Xtreme Turbo intake pipe Neuspeed Exhaust Stock airbox with K&N panel filter stock N75 valve working And NGK BKR7E plugs South Bend OFE SS clutch I could have done better if I had the right plugs (Bosch 3 electrode) and a manual boost controller but im pretty happy overall. Also the car was pulling 0 correction factors all the way through the rpm range so Lemmiwinks could have helped me with some more timing.
Pros: pretty good numbers
Cons: needed better plugs
Vehicle:
Audi A4
I just installed some of these NGK (BKR6E) plugs. I set the gap to .030 These went my 99 A4 1.8T Avant Quattro. The car is stock except for a K&N filter. Idle seems awesome and flawless all the way through the rev range.
Pros: awesome idle, flawless rev range
Vehicle:
Audi A4
Part number: BKR6E
I use Beru Utra-X UXF79 4 tips plugs. It's a great plug for my chipped B6.
Pros: great plug for chipped engine
Vehicle:
Audi A4
Part number: UXF79
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Top manufacturers of spark plug for Audi A4
This part for Audi A4 is made around the world. We have reviews for spark plug manufacturers from countries such as: Japan, Germany .
In March 2026, the ranking of spark plug for Audi A4 on PartReview included 4 manufacturers. It is based on 5 reviews and 15 votes.
Which spark plug to choose for Audi A4?
Last month, PartReview users preferred NGK. 40% of positive votes went to this manufacturer.
In second place: spark plug BERU — 20%.
Third place: Bosch with 20% of the votes.
In the overall ranking of spark plug, which aggregates opinions of owners of different car makes and models, these brands hold the following positions:
- NGK ranked 1, PR Score — 81. Based on 763 reviews and 2360 votes.
- BERU ranked 10, PR Score — 82. Based on 14 reviews and 46 votes.
- Bosch — rank 3, PR Score — 61. Based on 264 reviews and 832 votes.
Other parts for Audi A4
After seeing which spark plug owners of Audi A4 prefer, check other popular parts for this car. In March 2026, leaders on PartReview were:
- #1 Brake pads OEM Audi - 17% votes.
- #1 Battery Bosch - 40% votes.
- #1 Wiper blades Trico - 0% votes.
- #1 Engine oil LIQUI MOLY - 30% votes.
- #1 Tires MICHELIN - 19% votes.
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