Bosch Spark Plug Guarantee
Robert Bosch LLC guarantees your satisfaction or the improved performance in your vehicle when you use Bosch Spark Plugs. If you are not satisfied or do not experience quicker starts, smoother acceleration and improved fuel efficiency, return the plugs with your dated sales receipt and Bosch will refund the purchase price of the spark plugs. These guarantees apply to properly tuned vehicles and extend through the manufacturer's recommended spark plug change interval as indicated in the owner's manual. For maximum performance and lowered emissions, do not exceed the vehicle manufacturer's recommendations. These guarantees do not extend to damages due to misuse, accident, abuse, neglect, improper installation or application. These guarantees are limited solely to refund of the cost of spark plugs and do not include the cost of labor for removal or installation.