ONNAIS RV Door Lock Replacement – Full Metal Keyless Entry

The Verdict

If you’ve ever fumbled for RV keys in the dark with an armload of groceries, the ONNAIS RV Door Lock Replacement is the $40-ish upgrade that makes you wonder why you waited.

This is a full metal keyless entry system built for standard RV doors. Not the flimsy plastic paddle-handle replacement you find at the bargain bin — this thing has actual heft. The body is die-cast zinc alloy, the deadbolt is solid steel, and the whole assembly weighs noticeably more than the OEM latch you’re pulling off.

What you actually get

The box contains the exterior keypad assembly, the interior lock mechanism, a deadbolt, mounting screws, and a rubber gasket for weather sealing. One key is included. The unit is designed to replace most standard RV door latches — the key dimension to check is the backset (the distance from the door edge to the center of the latch hole), which is 2-3/8" or 2-3/4" on most RVs. The ONNAIS accommodates both.

Battery setup: Two AAA batteries (not included) power the keypad. The interior side has a small LED indicator that flashes when battery is low. You program the codes using a sequence on the exterior keypad — up to two 10-digit user codes can be stored.

Real-world performance

The keypad responds quickly. Touch the numbers, wait for the green light, turn the handle. It’s smooth, and the deadbolt engages with a satisfying solid thunk that tells you it’s seated. The handle action is spring-loaded, so it returns to position without sagging.

I’ve seen multiple reports of this lock surviving a full winter season without the mechanism freezing up — that’s the benefit of the metal construction. Plastic locks get brittle below freezing, and the internal latch mechanism can bind. The ONNAIS doesn’t have that problem.

One buyer noted: “Installed on my 2021 Grand Design Imagine in about 20 minutes. The factory holes lined up perfectly, no drilling needed.” That tracks with what I’ve seen — the fitment is the strongest selling point here.

Where it falls short

The key override situation. Some versions of this lock include a keyed cylinder on the exterior; others don’t. If you get the version without the keyhole, a dead battery means you’re locked out. The low-battery warning helps, but if you’re boondocking for weeks at a time, carry spare AAAs or make sure your version includes the keyed backup.

Dim keypad lighting. In direct sunlight, the backlit numbers are hard to read. You’ll memorize your code quickly, but if you’re letting a friend or family member in, they’ll struggle in bright conditions.

The screws. The included mounting screws are soft — several buyers stripped the Phillips heads during installation. Replace them with stainless steel #8 x 1" screws from the hardware store before you start. It’ll save you a headache.

Who should buy this

• RV owners with standard door prep who want keyless convenience — this is the target buyer, and it delivers
• Travelers who juggle multiple keys — one less key on the ring is genuinely useful
• Cold-weather campers — the metal construction handles temperature swings better than plastic alternatives

Skip it if you have a non-standard door thickness (the unit fits 1-3/8" to 2" doors) or if you absolutely require a keyed override on the exterior.

FAQ

Q: Will this fit my RV door? Measure the backset and door thickness first. Standard RV latches use a 2-3/8" or 2-3/4" backset, and this lock accommodates both. Door thickness should be between 1-3/8" and 2". If your door matches those specs, it’s a direct swap.

Q: How do I change the code? The exterior keypad has a programming sequence. Enter your current code, press the program button (hidden behind a small cover), then enter your new code twice. The full manual is included, and it’s straightforward — five minutes of fiddling and you’ll have it memorized.

Q: What happens when the batteries die? The interior LED gives you a low-battery warning several weeks in advance. If the batteries completely die, the version with the keyed cylinder can be opened with the physical key. The non-keyed version requires you to replace the batteries — which means you need to be inside or have the interior lock disengaged. Don’t let that happen; change batteries annually.

The Verdict

Rating: 4.2/5 — A solid, well-built keyless lock that solves a real problem for RV owners. The metal construction and easy fitment make it a worthwhile upgrade over the factory latch.

Buy it if you want keyless convenience on a standard RV door without paying $150+ for a name-brand smart lock.

Skip it if you’re in extreme climates (consistent sub-zero temps) or you need app connectivity — this is a simple keypad lock, not a smart lock. And if you want a keyed backup, confirm you’re getting the version with the exterior cylinder before you order.

The ONNAIS isn’t flashy, but it’s honest. It does exactly what it claims, it’s built to last, and it’s priced fairly. For most RV owners, that’s a winning combination.

Where to Buy

👉 Check Price on Amazon →

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.