Spark Plugs Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
Spark Plugs sales on Amazon US totaled 17,200 units in July 2026 (▼ 2.3% vs. the prior month), generating an estimated $725,340 in revenue across the 50 top-ranked ASINs for this search term. Demand is heavily concentrated at the top of the ranking — the ten best performers capture 47.7% of unit volume and 33.6% of revenue, while a typical listing is priced at $50.23. The keyword itself pulled 128,957 Amazon queries over the same period (▲ 15.6% MoM).
Zooming out to the 12-month window ending July 2026, the spark plugs Top 50 moved 166,250 units and $6,949,294 in cumulative sales — an average of 13,854 units and $579,108 per month. Monthly throughput topped out at 17,600 units in June 2026 and dipped to 9,500 in December 2025, leaving the latest reading 22.4% higher than August 2025.
Spark Plugs Sales Trend (Trailing 12 Months)
Based on the top 50 ASINs by monthly sales for this keyword
2025/08
2025/09
2025/10
2025/11
2025/12
2026/01
2026/02
2026/03
2026/04
2026/05
2026/06
2026/07
Monthly Sales 2026/07
17.2K
▼ 2.3% MoM
Monthly Revenue 2026/07
$725.3K
▼ 0.1% MoM
Top 10 Market Share 2026/07
47.7%
Spark Plugs Market Share & Sales Concentration on Amazon US — July 2026
The most-sold spark plugs listing on Amazon US in July 2026 is ASIN B003BUCNNS (Brand: NGK), which sold 1,000 units at $21.50 apiece — equal to 5.8% of every unit tracked in this report.
The Top 10 ASINs account for 8,200 units and $243,743 in July 2026 — 47.7% of unit volume and 33.6% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for 'Spark Plugs' on Amazon
July 2026
Is 47.7% Top 10 share highly concentrated?
Ask AI to evaluate competition, market structure, and entry opportunities using ’s tracked Amazon sales, ranking, and keyword data.
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Top 5 Volume Share breakdown
B003BUCNNS
NGK Iridium IX DCPR7EIX Spark Plugs Compatible with 1999-2016 Harley Davidson Twin Cam (Pair)
1K
▲ 0.0%vs. prior month
$21.3K
latest month
12-month trend
B00PMKOI06
NGK # 3186 G-Power Platinum Spark Plugs TR5GP - 8 PCSNEW
1K
▲ 0.0%vs. prior month
$36.5K
latest month
12-month trend
B07FNVYGFL
NGK LKAR7BIX-11S Iridium IX Spark Plug (93501 Iridium Ix), 4 Pack | Fits select 4-cylinder Acura, Honda, Lexus, Mazda, Pontiac, Scion, Subaru & Toyota models (2008–2025, varies by model)
1K
▲ 0.0%vs. prior month
$33.6K
latest month
12-month trend
B07FP6KFLT
NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridium Ix), 4 Pack
1K
▲ 0.0%vs. prior month
$32.7K
latest month
12-month trend
B0724YYQG7
NGK 3951 Spark Plugs TR55 (8 Pack)
800
▲ 0.0%vs. prior month
$21.3K
latest month
12-month trend
B07RL98RX6
NGK Iridium IX Spark Plug LFR5AIX-11 (4 Pack) Compatible With TOYOTA CAMRY LE 2010-2014 2.5L/2494cc
800
▲ 33.3%vs. prior month
$23.9K
latest month
12-month trend
Unlock to view all Top 50 ASIN competitors and their sales contributions
Trending Spark Plugs Products — Growth Leaders & New Top 10 Entrants
Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. Specifically, 2 ASINs forced its way in: B00M5ESDDU booked 700 units at $15.57, with ▲ 40.0% MoM change. On the growth side, B0D1SHH428 leads positive momentum with ▲ 300.0% MoM growth on 200 units.
The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.
B00M5ESDDU
NGK Spark Plug BKR5E-11- Set of 4
Price
$15.57
Rating
4.8
Reviews
388
Latest month sales
B00IAGN4UY
NGK 6619 Iridium Spark Plugs LFR6AIX-11-6 Pack
Price
$44.15
Rating
4.7
Reviews
3.1K
Latest month sales
B0D1SHH428
6 pc NGK Iridium IX Spark Plugs compatible with Honda Pilot 3.5L V6 2009-19 | Ultra-fine 0.6mm iridium tip sharpens throttle response and acceleration. 40,000-60,000 mile fine-wire performance.
Unlock to view ASIN details and product titles
Price
$58.92
Rating
4.5
Reviews
111
Latest month sales
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