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Automotive

Pack of 4 Laser Iridium Spark Plugs B2401-JA01JNW 2007-2017 and Spark Plug Grease Compatible with Nissan Altima Rogue Sentra Infiniti 22401-JA01B 22401-EW61C DILKAR6A11

Automotive4.1· 183 Amazon ratings

Bias-adjusted across 183 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Automotive.

17.9%
Percentile · Global
17.4%
Percentile · Cohort
Automotive
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Pack of 4 Laser Iridium Spark Plugs B2401-JA01JNW 2007-2017 and Spark Plug Grease Compatible with Nissan Altima Rogue Sentra Infiniti 22401-JA01B 22401-EW61C DILKAR6A11

How the score was built

Amazon ratings
183

used for the Bayesian percentile

Raw star average
4.1 / 5

unadjusted Amazon mean

Bayesian avg
4.17

raw rating shrunk to the category prior

Reviewer-graph z
0.707

bias-corrected vs. each reviewer's baseline (0 qualifying)

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Same category · Automotive

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