Is the case water proof?

I would consider the case, water repellent. I wouldn't recommend submerging the case. It closes extremely tight, and it is plastic. I think it's the best I've ever had. Good Luck!

Is the magnet strong? I bought some of these somewhere else but the magnets were so weak it wouldn't stay magnetized to the car.

The recessed magnet is designed to securely attach and hold to any steel surface. If you are experiencing issues, please contact customer service at 800-464-2088.

would a standard BMW key (with computer part) fit in this case?

The key case's dimensions are: 4-11/16in (119mm) L x 2in (51mm) W x 1-3/16in (29mm).

Anyone know why the description includes this caveat? "...not recommended for automotive applications"

Probably because it is not water tight. I found it to be fine, it's under my truck on the frame. Holds just fine on good metal.

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Master Lock Magnetic Key Holder, Key Storage Box to Hide Keys Black 207D

Product ID: 2342391

Details

Brand
Master Lock
Capacity
4.21 cubic
Color
Black
Included Components
key case
Item Weight
2.4 ounces
Lock Type
Magnetic

🔑Fits 1-2 keys securely

🧲Strong magnetic hold

🛡️Durable rust-resistant plastic

9946CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧲 Unlock convenience with magnetic precision!

BUILT TO LAST - Rust-resistant plastic with a sliding cover that won’t get lost—durability meets convenience.
MAGNETIC MASTERY - Powerful recessed magnet ensures your keys stay put—no slipping, no surprises.
TRUSTED SECURITY - Backed by Master Lock’s Limited Lifetime Warranty for peace of mind every day.
COMPACT YET SPACIOUS - Optimized interior volume (4.2 cubic inches) fits most keys and fobs comfortably.
STEALTHY KEY STORAGE - Discreetly hides your keys on any steel surface for instant access without compromising security.

The Master Lock Magnetic Key Holder offers a durable, rust-resistant plastic case with a powerful recessed magnet that securely attaches to any steel surface. Designed to hold 1-2 keys or key fobs, it features a sliding cover with a built-in stop to prevent loss. Compact dimensions and a 4.2 cubic inch interior volume make it perfect for discreet, reliable key storage backed by a Limited Lifetime Warranty.

Specifications

ASIN	B003WXGLS2
Additional Features	Rust Resistant, Portable
Best Sellers Rank	#3,969 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #702 in Home Storage & Organization (Home & Kitchen)
Brand Name	Master Lock
Capacity	4.21 cubic inches
Chamber Depth	0.75 inches
Color	Black
Customer Reviews	4.5 4.5 out of 5 stars (13,039)
Global Trade Identification Number	00071649147371
Included Components	key case
Item Dimensions D x W x H	4.69"D x 2"W x 1.19"H
Item Type Name	Magnetic Key Holder
Item Weight	2.4 ounces
Lock Type	Magnetic
Manufacturer	The Master Lock Company
Manufacturer Part Number	207D
Manufacturer Warranty Description	Limited Lifetime Warranty
Material Type	Plastic
Model Number	207D
Mounting Type	Surface Mount
UPC	071649147371
Unit Count	1 Count

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