Yelp
Recommended review
“Absolutely fantastic service. Incredible work. Highly recommended.”
- Vehicle
- 2017 GMC box truck
- Service
- Second car key
Candice L.
Automotive locksmith specialists
CALicensed service providerDiao Locksmith ServiceCA Locksmith Company License No. 8783
Fast local responseLA · Orange County · Riverside
Arrival confirmedCall with your location
Automotive specialistsCar keys · Programming · Lockouts
Vehicle compatibilityYear · Make · Model
Response estimates vary by traffic, technician availability, vehicle and exact location.
Mobile Car Locksmithin Orange County & Los Angeles
Need a spare car key? Lost it or locked out? We come to you.
Add a second key, replace a lost key, or program a compatible remote or smart key. Home and business lock service is also available by request.
Mobile service Fast response Professional equipment
Service area checker
Check mobile coverage
Primary region
Orange County
Active routes
Los Angeles County
Selected routes
Inland Empire
Technician coverage map
8 route markers · not liveService-area map loads as you reach this section.
ZIP estimates remain illustrative and are confirmed by phone.
T1–T8 are coverage-planning markers, not live GPS positions. Enter a ZIP for a regional estimate, then call to confirm an actual technician and arrival window.
Arrival confirmed by phone Vehicle ownership required
ZIP results and map markers are routing illustrations. They do not show live technicians or guarantee availability. Exact coverage, price and arrival time are confirmed before dispatch.
Services
The help you need, wherever you are.
From adding a spare key to an all-keys-lost replacement, our mobile car key replacement and programming service comes to your location across Orange County and Los Angeles.
Have one working key?
Add a spare now. Avoid an all-keys-lost emergency later.
Get a backup for another driver or keep one safely at home. We add compatible car keys, transponders, remotes, and smart keys for many supported vehicles.
Chip keys Remote-head keys Smart keys & key fobs
Car key solutions
Start with the vehicle. Solve the key problem.
Explore dedicated paths for American, Japanese and Korean, and German vehicles—whether one key still works or every key is lost.
Explore car key solutionsWhy choose us
Built around a better service call.
Clear communication, modern tools, and professional mobile service from the first call to the final key test.
Talk to a locksmithMobile Service
Professional Equipment
Transparent Pricing
Fast Response
Secure Payment
Local Service
How it works
Four clear steps.
One simple process.
From the first call to the final key test, every step is confirmed before the next one begins.
01
Tell us the vehicle
Share the year, make, model, location, and key situation.
02
Approve the quote
We confirm compatibility, scope, and price before dispatch.
03
Mobile service arrives
A technician comes to the vehicle with professional equipment.
04
Key tested. Done.
We test the key and vehicle functions before completing the job.
Vehicle coverage
One mobile service. Most major brands.
Toyota key serviceHonda key serviceLexus key serviceNissan key serviceHyundai key serviceKia key serviceFord key serviceChevrolet key serviceBMW key serviceMercedes-Benz key serviceTesla key service
Browse all 31 vehicle brands Explore vehicle key coverage Model and key-system support varies. Call to confirm compatibility.
Local coverage
Orange County & Los Angeles car locksmith service.
Explore local coverage details for mobile car lockouts, replacement keys, remotes, and smart-key programming.
View all service areasVerified customer feedback
Real service experiences, with a source for every review.
Selected feedback from public Yelp and Thumbtack review pages. Vehicle, city, and service details are shown only when the original review provides them.
Every card identifies its public source. Yelp reviews marked “Not Recommended” are disclosed separately and are not presented as part of Yelp’s recommended rating.
View source
Yelp
Recommended review
“He comes to your location and does it for you. Great customer service.”
- Vehicle
- MINI Cooper
- City
- Newport Beach, CA
- Service
- Mobile car key service
Cecilia S.
Yelp
Recommended review
“Very professional and helpful for a great price.”
- Vehicle
- 2023 Toyota RAV4 Hybrid
- City
- Anaheim, CA
- Service
- Mobile locksmith assistance
Tina N.
Yelp
Recommended review
“I was quite surprised by how easy and painless the whole transaction was.”
- Vehicle
- 2006 INFINITI
- City
- Garden Grove, CA
- Service
- Key-fob diagnosis
Mike L.
Yelp
Yelp Not Recommended
“Changed my key fob in less than five minutes. Very reliable.”
- City
- Tustin, CA
- Service
- Key-fob replacement
angiy c.
Yelp
Yelp Not Recommended
“He came at the promised time. Service was performed and the job completed.”
- City
- Long Beach, CA
- Service
- Key-fob and car key replacement
Xever W.
Yelp
Yelp Not Recommended
“Knowledgeable, with a great and very reasonable price.”
- Vehicle
- BMW and Nissan
- City
- Los Angeles, CA
- Service
- Two additional key fobs
Steve R.
Yelp
Yelp Not Recommended
“Easy to work with mobile service. Two keys completed without visiting the dealer.”
- City
- Santa Ana, CA
- Service
- Two additional car keys
Mark G.
Thumbtack
Published review
“Thank you for fixing my old Mercedes key and making it super fast.”
- Vehicle
- Mercedes-Benz C 300
- City
- Long Beach, CA
- Service
- Car key repair
Joyce S.
Thumbtack
Published review
“Both new key fobs work well. Mobile service arrived quickly after my call.”
- Vehicle
- Toyota Camry
- Service
- All keys lost · Two new key fobs
Tom W.
Thumbtack
Published review
“Diao Locksmith Service did a good job and programmed a new fob that works well.”
- Vehicle
- BMW X5
- Service
- All keys lost · New key fob
Ryan Z.
Thumbtack
Published review
“Fast, professional, and friendly. The spare car key works perfectly.”
- Vehicle
- 2025 BMW X5
- City
- Irvine, CA
- Service
- Spare car key cutting and programming
Anna W.
Business verification
A consistent business identity, on and off the site.
Diao Locksmith Service is the name shown on this website, the California locksmith company license, and the business’s Yelp listing.
Business listingDiao Locksmith Service is listed on Yelp.
Visit Yelp to view the current public business listing and source pages for the selected excerpts shown above. We do not invent reviews or present Yelp’s filtered reviews as part of its recommended rating.
View Yelp listingFAQ
Good questions, clear answers.
Need an answer for your specific vehicle? Call our team.
Can you add a spare car key if I still have one working key?
Yes, for many supported vehicles. We can cut and program an additional transponder key, remote, or smart key after confirming the vehicle and compatible hardware.
Can a locksmith make a car key without the original?
Yes. In many cases, a professional automotive locksmith can generate and program a replacement key using your vehicle information and proof of ownership.
How much does car key replacement cost?
Pricing depends on the vehicle year, make, model and key type. Contact us with those details for a clear quote before service begins.
How long does programming take?
Many key programming appointments can be completed during a single mobile visit. Timing varies by vehicle and key system.
Do you provide mobile service?
Yes. We travel to homes, workplaces, parking lots and roadside locations across our Los Angeles, Orange County and selected Inland Empire service area.
Fast. Reliable. On the way!