2017 BMW 4 Series
Emergency Mobile Key Service in Ventura County

Q: How long will the replacement key last?

With periodic battery changes and normal use, a properly programmed BMW key should last years. The transponder chip and internal electronics are durable. The most common complaints from BMW owners are about shell quality, not electronics. Multiple owners of recent 3 Series and M cars complained that even the 600 dealer key felt cheap and plastic with visible seam lines. A well-built replacement fob with properly programmed electronics will match or outlast the original in daily use.

Q: What if the new key stops working after a few weeks?

Call us and we will come back. Every key we make is covered by our warranty. If it stops starting the car, loses remote or comfort access function, or develops any issue under normal use, we fix or replace it. BMW forums are full of warnings about improperly programmed keys causing CAS or FEM corruption that can cost over a thousand dollars to fix at the dealer. We test every function before we leave and stand behind our work without those risks.

Q: How many buttons does the 2017 BMW 4 Series key have?

Your 2017 BMW 4 Series key has 4 buttons. The button count helps identify exactly which fob your vehicle uses, since BMW offers different key variants including comfort access, non-comfort access, and display key versions. When you call us, having this detail along with your year, make, and model helps us confirm the right key before we even head out so there are no surprises when we arrive.

Q: Can I trust an aftermarket BMW key to be reliable?

It depends heavily on the source and the BMW platform. Older E-series BMWs with CAS3 are more forgiving and aftermarket keys can work reliably. But on newer F-series FEM and G-series BDC vehicles, cheap aftermarket fobs frequently fail to program, lack comfort access support, or die prematurely. BMW i3 owners compared 40 dollar clone fobs to 500 dollar OEM units and still worried about being stranded if the clone failed. We use OEM spec keys specifically to avoid those reliability risks on your BMW.

Same-Day Service | No Towing Required

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Same-Day Service Done in Under 1 Hour Fast Response Time

Fast Response15-25

min arrival

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Quick Turnaround

Most keys completed in under 45 minutes on-site

Fully Insured

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On-Site Key Cutting

New key cut from vehicle codes, not from a copy

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2017 BMW 4 Series
Key Options

Same-day key replacement in under one hour

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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

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2017 BMW 4 Series Smart key Replacement - Fast, Affordable & Professional

Worst case on a 2017 BMW 4 Series is an all-keys-lost where another locksmith already attempted the job and left the FEM or BDC module in a corrupted state. A bad EEPROM write or power interruption mid-procedure can lock the module so it rejects all programming attempts. Some locksmiths see that error and tell you to tow it to the dealer. Others tell you the module is dead.

A customer's BMW was at a Euro auto shop in Ventura. The shop had called another locksmith for a key on his 4 Series, and that locksmith attempted an FEM unlock, got an error, and left. The module was in a fault state and the car was completely dead. The shop called me.

I brought my ACDP bench tool. I recovered the backup, patched the corruption, wrote it back, and generated a fresh key from the restored data. His smart key, FCC ID NBGIDGNG1, was a 4-button fob. The module came back online and the car accepted the new key on the first attempt. I showed the shop team what went wrong so they'd know what to look for if it ever came up again.

Total was about two hours, which is longer than normal. His bill was 353. The alternative was a flatbed to BMW, a potential module replacement at 639 or more, and a week without his car. I carry bench tools specifically for BMW module recovery jobs.

Need a 2017 BMW 4 Series Key Today?

Same-day service, 20-30 minute arrival, key done in under an hour. Call EZ Car Keyz now.

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LCO#6792

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2017 BMW 4 Series

Smart key | Rescue Key

10-15 min

Priority ETA

Available Today

Ventura

Help Is Close

805 Area

Get Help Now (805) 790-8162

BMW Customers Love Our Fast Service

Same-day service, five-star results

A

A. G.

Jun 2025

★★★★★

“A friend lost my Lexus key and he was able to program and cut a brand new one within 20 minutes. Arrived within about 40 minutes and was friendly, efficient, and quick.”

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Jennifer R.

Feb 2024

★★★★★

“The dealership quoted me $600 for a new Honda key. EZ Car Keyz did it for $225, same day, cut and programmed at my house. Works perfectly. Everyone should know this is an option.”

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Alexx C.

Dec 2025

★★★★★

“I needed a car key replacement in Hillcrest and EZ Car Keyz helped me immediately. The technician programmed a new smart key right next to my car and tested every function before leaving. Fast, friendly, and very professional.”

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Fast Help (805) 790-8162

BMW 4 Series Key Credential Questions

How on-site key replacement works

Do you use OEM or aftermarket keys on BMW vehicles?▼

We use OEM spec keys that match the factory part number, chip frequency, and blade profile for your specific BMW. On newer F-series and G-series BMWs, we strongly prefer OEM spec fobs because cheap aftermarket ones have a high failure rate and often do not support comfort access. A BMW tech bluntly warned that most Amazon BMW keys are unreliable and that qualified locksmiths refuse to program them. We carry keys we have tested and verified on BMW vehicles so you get a key that works and lasts.

How long will the replacement key last?▼

What if the new key stops working after a few weeks?▼

How many buttons does the 2017 BMW 4 Series key have?▼

Can I trust an aftermarket BMW key to be reliable?▼

Questions? Call (805) 790-8162