The Lemon Index$865 middle bill · most between $450 and $2,500
292 owner reports on 82 models
Ford F-Series, Ford Expedition, Honda Accord
Owners reported paying a median of $865 for a spark plug replacement, with the middle half of bills between $450 and $2,500. That's 292 owner reports on 82 models (283 complaints to NHTSA and 9 YouTube videos). Costs vary by shop and region.
What owners paid
- Under $50027%
- $500–$1,00026%
- $1,000–$2,50021%
- $2,500–$5,00019%
- $5,000 and up7%
Share of the 292 owner reports in each price band.
Cars where it comes up most
Owner reports per model. Raw counts, not a failure rate: popular models get more reports.
Every model, what owners paid
| Model | Reports | Middle bill | Middle half |
|---|---|---|---|
| Ford F-Series | 98 | $1,000 | $511–$2,500 |
| Ford Expedition | 26 | $1,000 | $525–$2,000 |
| Honda Accord | 10 | $2,900 | $1,200–$4,700 |
| Honda Odyssey | 9 | $4,400 | $1,900–$5,000 |
| Ford E-Series | 8 | $2,000 | $600–$3,600 |
| Honda CR-V | 8 | $1,600 | $1,300–$3,300 |
| Ford Escape | 6 | $870 | $710–$1,900 |
| Honda Pilot | 5 | $753 | $500–$3,500 |
| Hyundai Sonata | 5 | $532 | $500–$700 |
| Ford Fusion | 4 | too few for a range | |
| Ford Mustang | 4 | too few for a range | |
| BMW X5 | 3 | too few for a range | |
| Chrysler 200 | 3 | too few for a range | |
| Ford Edge | 3 | too few for a range | |
| Ford Explorer | 3 | too few for a range | |
| Ford Freestyle | 3 | too few for a range | |
| Jeep Grand Cherokee | 3 | too few for a range | |
| Kia Optima | 3 | too few for a range | |
| Kia Sorento | 3 | too few for a range | |
| Lincoln Navigator | 3 | too few for a range | |
| Ram pickup | 3 | too few for a range | |
Models with 3+ reports. A model gets its own page and a range at 5+ reports. 61 more models with 1–2 reports count in the totals above.
Engine codes that can lead here: P0300 P0301 P0302 P0303 P0304. A code is where a shop starts, not proof the part failed.
Related repairs
Engine replacement $8,000 · Fuel pump replacement $915 · Throttle body replacement $600 · Timing chain replacement $2,500 · Fuel injector replacement $1,700 · Head gasket replacement $3,000 · Ignition coil replacement $715 · Engine mount replacement $900
The details
How we count
Every number here is a repair bill an owner reported, never a shop's price list. Two sources: the bills owners wrote in their own complaints to the U.S. government (NHTSA), and the dollar amounts owners said out loud in YouTube repair and ownership videos. A figure counts for a repair when that repair is the part named nearest to it. Left out: purchase prices, payments, rentals, towing, warranties and deductibles, amounts under $50 or over $15,000, parts-only prices ("the part was $80 on Amazon"), bills for two different repairs named together, and money someone else paid. One number per complaint (or video) and repair: the biggest, so it's the bill, not the diagnosis fee.
The range is the middle half of the bills (the 25th to the 75th percentile), so one wild number can't swing it. Owners who complain to the government often had expensive repairs, so a typical bill can be lower. Costs vary by shop and region, by dealer vs independent shop, by parts and by miles. This is what owners reported, not a quote for your car.
Check the bills yourself
NHTSA complaint numbers (search them at nhtsa.gov): 11775289, 11765715, 11761480, 11761316, 11754514, 11754287, 11747122, 11746848, 11741530, 11741185, 11735293, 11735119 and more.
Said out loud on YouTube: $100 ▶ · $130 ▶ · $150 ▶ · $230 ▶ · $280 ▶ · $345 ▶ · $350 ▶ · $500 ▶
Quick answers
How much does a spark plug replacement cost?
Owners reported a median of $865, and the middle half paid $450 to $2,500, from 292 owner reports on 82 models. Costs vary by shop and region.
Which cars need a spark plug replacement most?
The most owner reports come from the Ford F-Series, Ford Expedition, Honda Accord. These are raw counts: popular models get more reports, so this isn't a failure rate.
Why do spark plug replacement costs vary so much?
Shop labor rates differ by region, dealers usually charge more than independent shops, new, used and rebuilt parts cost different amounts, and some bills include other work done at the same time.
Where do these numbers come from?
From 283 complaints to NHTSA and 9 YouTube videos: the repair bills owners themselves reported. Owner reports, not a price quote.
Sources: NHTSA owner complaints and YouTube videos (amounts said out loud), sorted by The Lemon Index. Owner reports, not a price quote. Costs vary by shop and region.