3945849 J945849 Belt Tensioner FITS FOR CUMMINS 3.9 5.9 4B 4BT 4BT 6B 6BT

Quality Aftermarket Replacement Parts. All pictures shown are for illustration purposes only, actual products may vary.

Please make sure to order the parts according to the part number, as the application machine model or engine model listed in the listings is just for reference.

We only ship to the address specified in the order and will charge the shipping charge if the package is returned due to undeliverable. If the package is damaged at delivery, please refuse the package or submit the claim request with damage pictures. 

The parts we provide are aftermarket replacement parts, we are only responsible for the parts we sold, and we can accept returns, refunds, or replacements if there are any problems with the parts, we do not compensate your labor, towing, repair, rental expenses or any other related expenses.

We have warehouses located in California USA , return can be accepted within 30 days of the purchase date, items must be returned in good condition, items returned in damaged condition will not be accepted. All returned items will be inspected before issuing refunds, shipping costs are non-refundable and a 10-20% restocking fee will be charged based on the condition of the returned item, no refund will be issued for the damaged items. Return can't be accepted for orders from other countries rather than California USA or China due to the expensive international shipping charge and return charge, please contact us to verify if you have any queries before ordering.

If you're satisfied with our quality and service please leave us a positive feedback with 5 stars rating, if you're not happy with our quality, please contact us before leaving any negative feedback, we will try to make things right to satisfy you.