2017 BMW X4
Google Guaranteed Key Replacement in Ventura County

Q: Do I need to tow my car to the dealer if I have no keys?

No. That is the standard advice on BMW forums, and it is the dealer solution, not the only solution. One E90 owner was told to call for a flatbed and tow it to the nearest BMW dealer because there was no other option. Towing adds time and money on top of a 500 to 800 dealer key bill, and then you still wait days for the VIN-ordered key to arrive. We come to wherever the vehicle is sitting and handle the entire AKL process on site, from module work and key generation to cutting and testing.

Q: How long does an all-keys-lost replacement take?

For CAS-equipped BMWs like E90, E60, and older X-series, the AKL process typically takes 1 to 2 hours on site. For FEM-equipped F-series BMWs, the module needs to come out for bench work, which brings total on-site time to roughly 2 to 3 hours. BMW dealers block similar shop time but owners report the total process stretching much longer once you add key ordering delays of days to weeks. We get it done in one visit at your location.

Q: What battery does the 2017 BMW X4 key fob use?

The 2017 BMW X4 uses a CR2032 battery. You can find them at most auto parts stores or pharmacies for a few dollars. When we make a replacement key, we always install a fresh battery so you are starting with a full charge. If your BMW fob is losing range or the comfort access stopped responding after a battery swap, the key may need to be re-synced to the vehicle, which is a quick procedure we can handle on site.

Q: Can you make a spare at the same time so I have two keys?

Yes, and we strongly recommend it. BMW CAS and FEM modules store multiple key slots, commonly up to 10 positions. During an AKL session we are already inside the module generating key data, so adding a second key during the same visit costs much less than a separate service call later. BMW forum members regularly say their biggest regret is not having a second key. One X3 owner advised negotiating a second key into any used BMW purchase because a spare will cost 500 to 700 later.

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All Keys Lost?

We make new keys from scratch, no existing key needed

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2017 BMW X4
Key Options

Licensed, insured, and backed by 1,000+ five-star reviews

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✓ In Stock · Programmed On-Site

EZ Car Keyz technician holding a programmed car key

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BMW uses a separate immobilizer module instead of embedding it in the engine computer like most brands. That means key work always involves talking to a dedicated brain, whether it's CAS, FEM, or BDC depending on your generation.

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All BMW X4 Keys Lost? Compare Options

Lost all your keys? Compare your options

EZ Car Keyz

Dealership

Average Cost

✓ $$

✕ $$$$

Location

✓ We come to you

✕ You drive there

Wait Time

✓ 20-45 min

✕ 2-5 days

Same-Day

✓ Yes

✕ Rarely

All Keys Lost

✓ No problem

✕ Tow required

OEM Quality

✓ Yes

EZ Car Keyz wins 5 out of 6

Lost all your keys? No tow truck needed

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2017 BMW X4 Emergency key Replacement - Fast, Affordable & Professional

When a 2017 BMW X4 key is done wrong, BMW's immobilizer makes it obvious fast. The engine cranks but cuts fuel instantly. The fob slots but the CAS throws an error. Or the key programs initially but the DME rejects the ISN sync and the car dies after one drive cycle. BMW security is layered, and cutting corners on any layer means the whole job fails.

A customer at the watch repair shop in Ventura had a key from another locksmith that worked for three days then stopped. His X4 would crank but immediately cut fuel. The other locksmith told him the DME was bad.

The DME was fine. The locksmith hadn't completed the ISN synchronization between the CAS4 module and the engine computer. BMW's immobilizer requires the CAS and DME to exchange a secret number. If that sync is skipped or done wrong, the car runs temporarily on a grace period then shuts down. I used my VVDI2 to read the CAS4 data, confirmed the ISN mismatch, and reprogrammed the key with the correct sync. His fob, FCC ID , was a -button smart key. Engine start was clean with no fuel cutoff.

His cost was 95. Dealer would have charged 200. The difference between a BMW key that works and one that dies after three days is the ISN sync. I verify it on every job because a callback on a BMW is expensive for everyone.

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2017 BMW X4

Emergency key | Programmed for Less

10-15 min

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Why BMW Customers Trust Us

Licensed, certified, and proven

E

Ezra M.

Oct 2025

★★★★★

“I needed a new key for my car and Marco gave me the best quote by far. He showed up, made the new key on the spot, and everything works perfectly. Fast service and great value.”

Google Review

H

Hunter P.

Jul 2025

★★★★★

“I called over 40 locksmiths trying to get a key made for my Audi A6 and nobody could do it. Tim made it easy, fast, and affordable. He showed up with a smile and got the job done without any stress. Absolute wizard with keys.”

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M

Marianne S.

Dec 2022

★★★★★

“I had two Subaru key fobs made and Marco provided excellent service. He stayed persistent through multiple part orders to make sure everything was correct. Very thorough, punctual, and great communication throughout.”

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Lost Your BMW X4 Key? Here's What to Know

What to expect when we arrive

I lost all my BMW keys. Can you still make a new one?▼

Yes. All-keys-lost is one of the most common calls we get on BMWs. We access your vehicle CAS or FEM module, read the security data, generate a new key file, cut a fresh blade, and hand you a fully working key. On CAS-equipped BMWs like E90, E60, and many X3 and X5 models, this is a well-established procedure. On FEM-equipped F-series BMWs, we remove the module and perform bench programming. No tow needed, no dealer visit, no weeks of waiting for a VIN-ordered key.

Do I need to tow my car to the dealer if I have no keys?▼

How long does an all-keys-lost replacement take?▼

What battery does the 2017 BMW X4 key fob use?▼

Can you make a spare at the same time so I have two keys?▼

Questions? Call (805) 790-8162