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Fast Response Locksmith

2020 Fiat 500x
Key Replacement - Save vs Dealer in San Diego

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2020 Fiat 500x Smart Key
Smart Key

Not all locksmiths are created equal. EZ Car Keyz is BBB A+ rated, fully licensed and insured, and trusted by thousands of customers across the area. Your vehicle is in good hands.

CA BSIS LICENSE LCO#6792
CA State Licensed Verified Creds Fully Insured
Fast Response15-25
min arrival
100+reviews
See why they skip the dealer113KSubscribers
Professional 2020 Fiat 500x locksmith quote from EZ Car Keyz National City CA
Marco Levy • EZ Car Keyz 🔥
Licensed Mobile Locksmith • San Diego, CA
15+
Yrs Exp
Professional 2020 Fiat 500x locksmith quote from EZ Car Keyz National City CA
Key specialists
Google Guaranteed
Passed Google's screening and verification process
Fixed pricing
Fully Insured
Liability coverage and background-checked technicians
Fast mobile service
8+ Years in Business
Over 10,000 keys made across the region
619 Special
10% OFFCODE:EZ-619-2026

🔥 Trusted by thousands, save today 🔥

Covers all NASTF-certified key work
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2020 Fiat 500x
Key Options

Dealer-grade key for a fair, honest price

Push To Start
Most popular Fiat key typeMost Popular
2020 Fiat 500x Smart Key M3N-40821302
FCC IDM3N-40821302Part #68155686ABButtons4BatteryCR2032Frequency433 MHzRemote StartNo
✓ In Stock · Programmed On-Site
Push To Start
2020 Fiat 500x Smart Key M3N-40821302
FCC IDM3N-40821302Part #68066349AF 68066349AGButtons3BatteryCR2032Frequency434 MHzRemote StartNo
✓ In Stock · Programmed On-Site
Professional 2020 Fiat 500x key programming by EZ Car Keyz National City CA
Skip the Dealer Markup
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Professional 2020 Fiat 500x key programming by EZ Car Keyz National City CA
🔧 PRO TIP
The 2020 Fiat 500x uses a 4-button smart key fob running a CR2032. The fob itself is not exotic, but the immobilizer pairing behind it is where people get burned. The vehicle security system requires a PIN-based handshake pulled directly from the body control module before a new key gets permanently committed to memory. If that PIN step gets skipped or the sequence gets interrupted, the car will crank and immediately die, every time. Looks like a dead engine. It is not. It is an incomplete registration. A lot of generic key tools will start the process and appear to finish it without actually completing the security handshake. You only find out when the owner tries to drive away. The battery in the fob is a CR2032 and it is easy to swap, but a weak battery on a smart key for this vehicle can also cause inconsistent detection rather than a clean no-start, so that is always the first thing I check before assuming the key needs a full reprogram.
Related services: Ignition Repair · Smart Key

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EZ Car Keyz
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
✓ Yes
EZ Car Keyz wins 5 out of 6
BSIS licensed with OEM quality guaranteed
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2020 Fiat 500x Smart Key Replacement - Fast, Affordable & Professional

There is a community garden lot over in the Sweetwater area of National City. A volunteer there called me on a Saturday morning. Before she even described the problem, she told me she had already paid someone else to do this job. That is never a good way to start a call.

The other locksmith had cut and programmed a replacement smart key for her 2020 Fiat 500x. The car would crank, run for about two seconds, and then die. Every time. He told her the body control module was faulty and walked away with his money. She had been driving a rental for a week.

The BCM was fine. What was not fine was the immobilizer registration. The vehicle security system on these uses a PIN that lives inside the body control module. You read it out through the OBD port with the right tooling, then use it to authorize the key programming sequence. If you rush that step, enter a bad PIN, or use a tool that fakes its way through the handshake, the system accepts the key temporarily and then drops it. The car starts, the security system catches that the key was never properly committed, and it cuts fuel. Two seconds, dead.

I connected through the OBD port, pulled the correct PIN from the module, cleared the failed key data that the previous tech had left behind, and ran the full registration sequence clean. Her fob, all four buttons, emergency blade, start, lock, unlock, everything came up confirmed on my screen. I turned the laptop toward her so she could see the confirmation herself. She had been told a story about a bad module. I wanted her to see the actual result.

She had already paid once for work that was not done right. I could not fix that. I could make sure she was not going to pay twice for the same broken outcome.

Save vs the Dealer on Your Fiat 500x Key

Get your key for hundreds less than the dealer. Same quality, same result, better price.

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BSIS Licensed Locksmith - California License LCO#6792
BSIS Licensed
CA Bureau of Security & Investigative Services
NASTF Certified Automotive Locksmith - Vehicle Security Professional
NASTF Certified
National Automotive Service Task Force
Fully Insured Locksmith - Hiscox Liability and Vehicle Damage Coverage
Fully Insured
Liability & vehicle damage coverage
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Also serving: Bay Marina · Downtown National City · Old Town National City · Sweetwater

Fiat 500x Rapid Response, Done Right

Rapid response in the field

2020 Fiat 500x Smart Key
2020 Fiat 500x
Smart Key | Pro Grade Service
Estimated arrival time to National City
Proven Timing
Rapid Arrival
Available Today
Service location National City
National City
Insured Service
619 Area
Same-Day Keys (619) 876-1271

Licensed, Certified, and Reviewed

Trusted and verified by real customers

A
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.”

Google Review
J
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.”

Yelp Review
E
Erick
Nov 2025
★★★★★

“A+ service at an even better price. Tim was a lifesaver. I lost my original and only key for my Audi and he was willing to come to my location at 8pm the same day. He worked fast, communicated clearly, and made sure everything worked before leaving.”

Google Review
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Certified locksmith review for 2020 Fiat 500x service by EZ Car Keyz National City CA
“Real savings, real reviews.”
Certified locksmith review for 2020 Fiat 500x service by EZ Car Keyz National City CA
5.0 out of 5 - Based on Over 100 five-star Google reviews
Best Price (619) 876-1271

Fiat 500x Mobile Service FAQ

Real costs, no dealer surprises

What is the cheapest way to handle all-keys-lost on my 2020 Fiat 500x?
Call a mobile locksmith before you call the dealer or a tow truck. Dealer all-keys-lost on these runs well into the hundreds before you factor in towing a car that will not start. I come to your location in National City, pull the security PIN from the body control module, wipe the old key data, and register new keys on site. No tow, no waiting for a parts order, no surprise charges beyond what I quote you on the phone.
Can you delete lost or stolen keys so they no longer work?
Does my 2020 Fiat 500x smart key have a hidden emergency blade inside it?
My 2020 Fiat 500x cranks and immediately dies. Could this be an immobilizer issue and not a mechanical problem?
I bought a replacement fob online for my 500x. Can I program it myself?
Questions? Call (619) 876-1271

Fiat 500x Key Service Areas

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