Heat Exchanger, also Brisk racing spark plugs I gapped mine to 0.026”.
Vehicle:
Audi S4
Best Spark plug for Audi S4
Since I've owned my 18 S4 i've done almost everything myself:
4 oil changes, spark plugs at 40k, 2 sets of pads and 1 set of rotors, both air filters.
Pros: done almost everything myself
Vehicle:
Audi S4
Mileage: 40000 km
I don't cheap out on the car so everything i put most by a name brand. New Parts; 37. NGK Spark Plugs
Pros: name brand
Vehicle:
Audi S4
The Bosch side fires are an AAN plug that has a removable top. I will probably use those, they worked great with my B5 S4.
Pros: worked great
Vehicle:
Audi S4
Anyways, I put in so Bosch Tri-Electrodes and Beru coilpacks. Once I got the APR ECU back the car fired right up. I drove it for a good hour and no misfires!!!
Pros: no misfires, car fired up
Vehicle:
Audi S4
I recently took my stage 2 43K mile b8.5 s4 apart and did the PCV, water pump, thermostat, new 2 step colder brisk spark plugs gapped to .25. I took the spark plugs out and noticed heavy carbon and the ground electrode was white, even on all plugs . (20 miles on plugs)
Cons: heavy carbon, white electrode
Vehicle:
Audi S4
Mileage: 69202 km
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Top manufacturers of spark plug for Audi S4
This part for Audi S4 is made around the world. We have reviews for spark plug manufacturers from countries such as: Germany, Czechia, Japan .
In March 2026, the ranking of spark plug for Audi S4 on PartReview included 4 manufacturers. It is based on 6 reviews and 19 votes.
Which spark plug to choose for Audi S4?
Last month, PartReview users preferred Bosch. 31% of positive votes went to this manufacturer.
In second place: spark plug BRISK — 15%.
Third place: NGK with 15% 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:
- Bosch ranked 3, PR Score — 61. Based on 264 reviews and 832 votes.
- BRISK ranked 4, PR Score — 78. Based on 43 reviews and 141 vote.
- NGK — rank 1, PR Score — 81. Based on 763 reviews and 2360 votes.
Other parts for Audi S4
After seeing which spark plug owners of Audi S4 prefer, check other popular parts for this car. In March 2026, leaders on PartReview were:
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- #1 Brake caliper Brembo - 30% votes.
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