Bosch Warranty Information

The following is a summary of manufacturer warranty terms. This summary in no way modifies or supersedes the original terms.

Robert Bosch Corporation (“Bosch”) warrants all new Bosch Spark Plugs (“Product”) sold by it against defects in material and workmanship throughout the vehicle manufacturer’s entire recommended spark plug change interval as indicated in the vehicle owner’s manual commencing on the date of sale to the first end-user (“Consumer”). If engine damage occurs which is proven to have been caused by a defective Product, Bosch will assume the reasonable costs of repairing the damage. Bosch will not assume any liability for damage resulting from any deviation from Bosch’s application recommendations as printed in Bosch’s catalog, nor will Bosch assume liability for any Product which has not been properly installed in accordance with Bosch’s written instructions and accepted industry standards.

This warranty is limited to the original Consumer, i.e., not transferable to subsequent owners of the Product or Vehicle. Specifically excluded from this warranty are failures caused by misuse, neglect, modification, abuse, improper application, installation or operation, or by unauthorized service or use of unauthorized parts. To the extent allowed by law, this warranty sets out your exclusive remedies with respect to Products covered by it, whether for negligence or otherwise. Neither Robert Bosch Corporation nor its affiliated companies will be liable for incidental or consequential damages, such as telephone calls, loss of time, inconvenience, commercial loss, etc.

THIS WARRANTY IS IN LIEU OF ALL OTHER EXPRESS WARRANTIES. ANY WARRANTY IMPLIED BY LAW, WHETHER FOR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR OTHERWISE, IS LIMITED TO THE PERIOD THAT THIS EXPRESS WARRANTY IS EFFECTIVE. No attempt to alter, modify, or amend this warranty shall be
effective unless authorized in writing by an officer of Bosch.

Bosch warrants oxygen sensor products to be free from defects in materials or workmanship for a period of 12 months.

Bosch provides a Limited Lifetime warranty on Engine Management products including 

To initiate a warranty claim, download and fill out the form below, carefully following the instructions. This warranty form claim must be completed and the part sent within 30 days of part failure. Please contact us with questions.