MOTORAD locking fuel cap MGC-802

Where it shines

Some drivers want a fuel cap that does more than close the filler, others would rather keep the replacement as simple as possible. The MOTORAD MGC-802 is a locking fuel cap intended to deter fuel theft and vandalism, with pressure and vacuum relief valves described as part of its design. Those features make it worth considering when replacing a cap, provided the part number is right for your vehicle.

If you prioritize an added barrier against casual access, a locking cap has a clear purpose, if you prefer the least complicated replacement, a standard cap may suit you better. The lock is a deterrent, not a guarantee against theft, so it should not be treated as security on its own.

What matters most

Fitment is the main buying check. The listing names MGC-802 and a series of replacement references, including 12F29L, F75Z9030GA and F8AZ9030AA. That list can help narrow down a match, but the product details do not identify specific vehicles. Compare the cap’s part number with the reference for your existing cap or vehicle before ordering, a similar-looking part number is not enough to establish compatibility.

The other notable detail is the pressure and vacuum relief valve design. These valves are intended to manage pressure and vacuum, while a properly sealing cap can also help limit fuel vapour escaping. The listing says a leaking cap can allow up to 30 gallons of gasoline to evaporate over a year. Treat that as a claim in the product information, not a guaranteed saving from replacing this cap. There is no test data here to show how much evaporation this particular model prevents.

MOTORAD describes the cap as made with OEM-quality materials and safety standards, but the available details do not specify its material or explain its locking mechanism. Without having tested it, the soundest basis for a decision is the stated function and an exact part-number match—not assumptions about construction or extra security features.

Best use cases

This cap is aimed at someone replacing a fuel cap who wants a locking design and can confirm MGC-802 or one of the listed references applies. Picture leaving a vehicle parked for the day: the lock may add a practical obstacle for someone trying to access the fuel, while the relief-valve design addresses a separate concern around pressure and vacuum. It makes sense if those functions matter and the reference numbers line up.

A basic non-locking replacement may be the more suitable approach if added theft deterrence is not a priority. No vehicle fitment details beyond the replacement references are provided, and the product information does not explain how the cap is maintained. That leaves compatibility as the key limitation, rather than any stated performance comparison.

To wrap up

Choose the MGC-802 when you want a locking replacement cap, value its stated relief-valve design, and can verify an exact reference match. It isn't for you if you need confirmed fitment for a particular vehicle from the information provided, or if you simply want a non-locking cap without the added deterrent. The long replacement-number list is useful for checking, but it does not by itself confirm that the cap suits every vehicle associated with those references.