Spark Plug Recycling: How to Turn Old Spark Plugs Into Cash
Not all spark plugs are equal, but some contain precious metals in their electrodes: Iridium Spark Plugs – High-performance plugs (such as NGK or Denso) contain small amounts of iridium, a rare metal worth thousands per ounce.
Product Details
Most people throw away used spark plugs without realizing they may contain valuable metals like platinum, iridium, and copper. Mechanics, scrapyards, and car owners discard them every day—but smart recyclers are turning them into profit.
If you’re looking for a simple side hustle with low startup costs, spark plug recycling could be a great opportunity. Here’s everything you need to know.
Why Are Used Spark Plugs Valuable?
Not all spark plugs are equal, but some contain precious metals in their electrodes:
Iridium Spark Plugs – High-performance plugs (such as NGK or Denso) contain small amounts of iridium, a rare metal worth thousands per ounce.
Platinum Spark Plugs – Common in modern vehicles, platinum is another high-value metal.
Copper/Nickel Plugs – Less valuable, but scrap yards still accept them in bulk.
Even damaged or rusty plugs can be recycled—meaning no spark plug is truly worthless.
How to Start Recycling Spark Plugs for Profit
Collect Used Spark Plugs
Ask local mechanics (many throw them away).
Check junkyards and auto repair shops.
Save your own when replacing them.
Sort and Identify Valuable Plugs
Look for brand names (NGK, Denso, Bosch, etc.).
Check the center electrode—platinum and iridium plugs often have a fine, pointed tip.
Use a magnet test (precious metal plugs are usually non-magnetic).
Tips for Maximizing Profit
Stockpile before selling (higher quantities get better prices).
Remove ceramic insulators for purer scrap value.
Check eBay sold listings—some plugs are worth more as collectibles than scrap.
Is Spark Plug Recycling Worth It?
Pros:
Low or no startup cost.
Simple way to earn extra cash.
Environmentally friendly (keeps metals out of landfills).
Cons:
Small profits unless collected in bulk.
Some buyers require large quantities.
Final Verdict: If you can easily collect used spark plugs, this is a low-risk side hustle worth trying.
Get Started Today
If you want a list of trusted buyers, leave a comment below. Share this guide with others who might be interested!
