Key Fob Not Working in Bromley
If your key fob is not working, our Bromley auto locksmiths can help with quick diagnosis, repair, or replacement to get you back on the road. We’re local to Bromley and cover all BR postcodes with fully equipped mobile units, offering key fob repair, key fob replacement, and car key programming on the spot.
Our technicians have over 10 years’ experience, are DBS-checked, insured, and use dealer-level diagnostics for modern vehicles (OBD2, EEPROM, immobiliser/ECU programming). Wherever possible, we use non-destructive methods and all new keys and programming come with a clear warranty.
When Your Key Fob Stops Working
A faulty car key fob can fail suddenly or degrade over time. Common symptoms include:
- Buttons do nothing even with a new battery
- Central locking responds intermittently or only at very close range
- Car won’t start or shows “Key not detected” or a red key symbol on the dash
- Boot release works but lock/unlock doesn’t (or vice versa)
- Vehicle locks then immediately unlocks again
- You hear clicking but doors don’t move
- The fob works, then fails after rain or a drop
Typical reasons your key fob is not working:
- Dead or weak fob battery
- Desynchronised fob after battery change or low battery
- Damaged button switches or cracked solder joints from wear or drops
- Water ingress or internal corrosion
- Worn key blade or damaged flip mechanism affecting the transponder coil
- Faulty transponder chip or immobiliser pairing issue
- Signal interference or aerial/receiver faults in the vehicle
- Software issues needing reprogramming after a flat car battery or ECU update
If you’ve tried replacing the battery and it still doesn’t work, it likely needs programming, electronic repair, or a replacement fob coded to your vehicle.
Our Expert Key Fob Repair and Replacement Process
We bring the workshop to you anywhere in Bromley and the BR postcode area (including Beckenham, Orpington, Chislehurst, West Wickham, and Hayes). Here’s how we fix key fob problems efficiently:
- Assessment and diagnostics
- Quick checks: battery, shell, key blade, buttons
- Scan the car with dealer-level OBD2 diagnostics to read immobiliser and central locking data
- Signal test to confirm if the fob is transmitting correctly
- Repair where possible
- Replace the fob battery with the correct specification
- Micro-soldering for common faults: button switches, cracked tracks, dry joints
- Replace worn buttons, flip springs, or key blade pivots
- Clean and dry boards after water ingress, replacing components if viable
- Re-sync and program
- Re-synchronise the remote locking where needed
- Program transponder chips to the immobiliser using secure OBD2 methods
- For certain models, perform EEPROM/ECU programming when standard methods don’t apply
- Replace when repair isn’t cost-effective
- Supply and code a high-quality replacement remote key or smart/proximity fob
- Cut the key blade precisely (including laser-cut/high-security profiles)
- Test locking, unlocking, boot release, and engine start before handover
- Provide a clear warranty on keys and programming
We work with all major makes and models, including Ford, Vauxhall, Volkswagen, BMW, Audi, and Mercedes-Benz, as well as popular brands like Toyota, Nissan, Kia, Hyundai, Peugeot, and Renault.
Non-Destructive Methods, With Rare Exceptions
We prioritise non-destructive entry and programming methods. In rare cases—such as severe water damage or a locked vehicle with a completely dead system—mechanical entry or component replacement may be required. We will always explain options and costs clearly before any work.
Why Choose Our Bromley Auto Locksmiths
- Local and mobile: Based in Bromley, covering all BR postcodes with rapid, efficient dispatch
- 10+ years’ experience: Trained, insured, and DBS-checked technicians you can trust
- Dealer-level equipment: OBD2 diagnostics, immobiliser/ECU tools, EEPROM where necessary
- All key types: Remote fobs, flip keys, smart/proximity, push-to-start, transponder keys
- All makes and models: From Ford and VW to BMW, Audi, Mercedes, Toyota, Nissan, and more
- On-the-spot service: We come to your home, work, or roadside
- Transparent warranties: Clear guarantees on new keys and programming
- Safety-first: Non-destructive methods wherever possible, with clear communication
If your situation is urgent—locked out or stranded—please visit our dedicated car unlock service Bromley page or call us now.
Related Services for Key Fob Issues
- If your fob needs coding or has lost sync, see our dedicated Car Key Programming service
- When the fob is beyond repair or you need a spare, our Car Key Replacement page explains options
- Problems with the lock barrel or ignition? Visit Car Lock and Ignition Issues
You can also browse the popular brands we cover on our brands we cover hub.
Brands We Commonly Fix for Key Fob Problems
We regularly repair and program fobs for:
- Ford (Focus, Fiesta, Transit, Kuga)
- Vauxhall (Corsa, Astra, Vivaro)
- Volkswagen (Golf, Polo, Transporter)
- BMW (1 Series, 3 Series)
- Audi (A3, A4, Q5)
- Mercedes-Benz (A-Class, C-Class, Sprinter)
- Toyota, Nissan, Kia, Hyundai, Peugeot, Renault, Skoda, Mini, Land Rover, Volvo, Citroën, and more
Tips Before You Call
- Try a fresh, known-good battery of the correct type
- Check for interference sources nearby (strong Wi‑Fi routers, chargers)
- Test your spare key if you have one—if both fail, the car may be the issue
- If the car battery has recently been flat or changed, a re-sync/program may be needed
If none of the above helps, we can diagnose and fix the root cause quickly at your location.
FAQs
Why is my key fob not working after I changed the battery?
Often the fob needs re-synchronising after a battery swap. In some cases, battery leakage or static can damage tiny components. We can re-sync or repair the fob and, if needed, program a replacement.
My car says “Key not detected”. What should I do?
First, hold the fob against the start button or in the emergency start location (check your manual). If it still won’t start, the fob’s transponder or the vehicle’s receiver may need programming or repair. We can carry out on-site diagnostics and car key programming.
Can you repair water-damaged key fobs?
Yes, if addressed quickly. We strip, clean, and micro-solder where feasible. If corrosion is extensive, we recommend a replacement remote or smart fob coded to your vehicle with a warranty.
Can you program a used key fob to my car?
Sometimes, but many brands lock fobs to the first vehicle. Programming a new, suitable remote is often more reliable. We’ll advise the most cost-effective option on-site.
How long does it take to fix a key fob?
Simple re-syncs or battery replacements can take minutes. Diagnostics and programming typically take 20–60 minutes. Complex EEPROM/immobiliser procedures can take longer, depending on the make and model.
Will you need to take my car to a dealership?
No. We’re a mobile auto locksmith service with dealer-level tools, including OBD2 and EEPROM programming, so we complete most jobs at your location anywhere in Bromley and the surrounding BR areas.
Next Steps
If your key fob is not responding, we can test, repair, or replace it today across Bromley and the BR postcode area. For ongoing lock or ignition faults, see our guide to car lock and ignition issues. If you’ve lost your only fob, we can also help with lost or stolen car keys.
Prefer to speak to a person? We’re friendly, professional, and ready to help.
Need help now? Call 020 8103 1180 or Email us.
Helpful links
