Mopar Locking Diesel Fuel Cap

Mopar Locking Diesel Fuel Cap

Reason to install 

This has been bugging us on our 4Runner as well and while I fully understand that thieves will just drill the tank, I don't care about "professional" gas or diesel thieves. I care about a-holes dropping stuff in the tank because for some reason, and possibly in their twisted minds, don't like us or our vehicle.

So, this is to keep less determined people away from things that shouldn't be in easy access anyways. Not a safety measure, an anti-idiot measure. 

Quality 

The fuel cap itself feels cheap and very plasticy, it rattles a bit and is fully plastic, the lock cylinder feels pretty solid, I guess it's the same used for the doors, just repurposed for this cap.  

Installation 

Installation time is mainly used for keying the lock cylinder to the vehicle's key, Quadratec has a good video on how to do that in a pretty much fool-proof way. It's still a "one way installation", so if the lock cylinder is inserted into the gas cap and not keyed correctly, you're done, you have just wasted more than $100. I don't get why they don't included a small slot in the cap where the "cylinder retainer" could be released when the cap is open, but it is what it is.

Since I have re-keyed many such cylinders before (mostly on BMW motorcycle luggage), I was well aware of the process, so it was a simple job of just sorting through the parts, arranging them on a paper towel, installing the springs, lock plates, and plastic retainer, then inserting the cylinder into the cap and installing that on the car. Multiple stages of testing and making sure I'm not locking myself out inbetween, but otherwise quick and simple. 

In Use 

The lock is a bit fiddly since the key is so bulky. You have to insert the key, hold the cap in place so it doesn't turn, turn the key to unlock, then turn the cap with the key in the cap. As said, fiddly, but perfectly doable. Would have been nicer to have the outer door included in the central locking, but hey, we get what we pay for (or ask for, if enough people complained about this, Jeep would include it, but people seem to be ambivalent about this in the US – not so much in Europe, never seen a vehicle with non-locking cap there). 

Overall 

Quick and easy, should have been included from stock, should be able to remove key when unlocked to make it less fiddly.  

Rating: 3.5/5 – would install again, but could be better