The DEF-Loc is the locking/tamper-resistant DEF cap for Ram Turbo Diesel pickup trucks. Locking up your DEF prevents unwanted matter from being put into your DEF tank. The DEF-Loc also features an EPDM U-Cup seal and also has a venting feature cut into the underside of the stainless steel Secure Screw head.

Each DEF-Loc comes with the DEF-Loc cap and one Secure Key. The locking DEF cap is not designed to work with the OEM tether.

NOTE: Will also work on Cab & Chassis model trucks.

THIS WILL WORK ON THE 2019 RAM 1500 CLASSIC WITH THE ECODIESEL BUT IT WILL NOT WORK WITH THE 2019 AND NEWER RAM HEAVY DUTY TRUCKS.