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The door locks on my truck are badly busted and probably not worth replacing - a set of new locks and other latch mechanism parts, plus my time spent installing them would cost more than the truck is worth. Naturally, someone let themselves in last night and rifled through my center console. I don't keep anything valuable inside, but I also don't love being a target for local thieves.

My thought is to just install a Mister Bean Lock since we only use the vehicle for occasional hauling. Is this street legal? What would be the best kind of latch to use, and how could I attach it to prevent someone from unscrewing it? How would I seal the fastener penetrations to keep water out of the door cavity? Is there some other low-cost alternative I should consider?

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    My suggestion to you is to get a lockable car cover for it. Since you don't use it that often, it will keep the elements off of it, you don't have to do something which might be illegal nor defacing to your vehicle, as well as keeping the casual I'm gunna go see what's in this piece of car just because it's unlocked kind of person out of it. Won't stop the serious kind of person who might want to get in it, but then, a window never stopped those people, either. – Pᴀᴜʟsᴛᴇʀ2 Jul 21 at 18:55
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    If it's even a medium size truck getting a cover on and off will be a pain @Pᴀᴜʟsᴛᴇʀ2 – GdD Jul 21 at 19:08
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    Legality of the Mr. Bean Lock shouldn't be an issue. Just add it below the existing handle and lock assembly, and leave the original stuff in place. When you're in the truck, the door will be held closed by the original latch. The only challenge IMO is waterproofing the holes required by the MBL. – DavidSupportsMonica Jul 21 at 19:23
  • You could watch this; m.youtube.com/watch?v=UODxNaPTVFM – Solar Mike Jul 21 at 19:24
  • Sharp edges or projections which can hurt pedestrians may result in MOT test failure (UK). Also applies to electrifying the vehicle - you will probably be the loser if anyone is hurt. I seem remember from college days about UK case law that if you have anything dangerous on your property that hurts someone, you are to blame even if they have no legal right to be there. – Weather Vane Jul 21 at 20:02
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Nothing says style like having external locks on your truck, but I've committed worse sins. I'm not going to comment on the legalities, external locks are common on delivery vans so I'm assuming it's not an issue. I would make sure both sides are unlocked when you drive to make sure you can be rescued in an emergency!

As for what kind of lock I'd suggest a slide bolt lock (aka a pad bolt lock) just like in the video. Hasp and staple locks have parts that swing and would bang around as you drive, and could possibly scrape other cars if you get close enough. As for how to attach them there's the easy way, and the harder way. The harder but stronger way is to open up the door and use carriage bolts, which are completely smooth with a square neck which anchors into a square hole in the lock plate. You then tighten the nut from behind. I would use some big washers or better yet a bit of metal plate on the backside of the door to spread the load if someone does decide to pry your door open. You'll want to make sure the length of the bolts is as short as you can get away with to prevent them from interfering with the window mechanism. I'd also suggest using threadlocker or locking nuts as rattling will tend to loosen things and you really only want to have to do this once!

The easier way is to use some sort of metal screw, preferably with a security head of some kind, again short so it doesn't interfere with anything. You would likely need to use these on the part of the lock going into the pillar, unless your truck would allow access from behind.

As for water ingress I'd just use some exterior silicone around the holes.

You could think about getting a pair of working doors from a salvage yard and attaching them instead. Depending on the make and model this may be a simple and cheap option.

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  • I never thought about replacing the entire door! Might be a good idea since the window mechanism is also broken on the driver's side. – alexw Jul 22 at 3:13
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    In that case it sounds like the way to go @alexw. If you can find a matched pair great, worst case is you have 2 different door keys. – GdD Jul 22 at 7:09

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