Key Fob Not Working in Slough

If your key fob is not working and you’re stuck in Slough or anywhere across the SL postcode area, we can help quickly and professionally. A faulty car key fob can leave you unable to unlock your doors, start your car, or disable the immobiliser. Our mobile auto locksmiths diagnose and fix key fob problems on the spot, from simple battery issues to complex transponder or immobiliser faults, using dealer-level diagnostics and non-destructive methods wherever possible.

When You Need Help With A Faulty Car Key Fob

A key fob problem can appear out of nowhere or gradually get worse. Common symptoms include:

• Buttons do nothing or only work intermittently
• Doors unlock but the car won’t start, or “Key Not Detected” shows on the dash
• The red key symbol stays lit or flashes
• Central locking works on the door key but not via the remote
• Very short operating range, needing to be next to the car to work
• The car unlocks but re-locks immediately
• The fob LED doesn’t flash when you press a button
• The fob works in warm weather but fails in the cold or after rain

Typical causes we see in Slough include:

• Dead or weak key fob battery
• Worn buttons or cracked solder joints on the circuit board
• Desynchronised remote after battery change
• Water or impact damage
• Faulty transponder chip (immobiliser won’t recognise the key)
• Antenna/receiver issues, or interference near busy areas like Slough Trading Estate
• ECU/immobiliser glitches after a low car battery or jump-start

If you’ve noticed any of the above, our specialists can test, repair, re-synchronise, or replace your key fob at your location. For related issues such as a snapped key blade or physical damage, see our guidance on a broken car key.

How We Fix Key Fob Problems

We bring a fully equipped mobile workshop to you anywhere in the SL area, from Langley and Cippenham to Windsor, Maidenhead, Iver, and Stoke Poges. Our process is clear and methodical:

1. Initial assessment

• We verify the symptoms, check fob battery voltage, inspect the PCB (circuit board), and confirm the immobiliser status using dealer-level tools.
• We also assess the car’s battery and relevant fuses to rule out vehicle-side issues.

2. Non-destructive diagnostics

• OBD2 diagnostics: We connect to your vehicle to read immobiliser and central locking faults.
• RF testing: We confirm the fob is transmitting the correct radio frequency.
• Transponder checks: We test whether the chip is recognised by the immobiliser ring.

3. Fast fixes on the spot

• Battery replacement and re-synchronisation procedures when needed.
• Key fob repair: micro-soldering for broken button pads, switch replacement, and moisture cleaning where safe.
• Key blade replacement or flip-key hinge repairs if the blade is worn or broken.
• Remote reprogramming: We carry out remote key programming or re-pairing to restore locking functions.

4. Replacement when repair isn’t viable

• If the fob electronics or transponder are beyond repair, we can cut and code a new key on site.
• We provide transponder key programming, smart key programming, and proximity key replacement with immobiliser pairing, using OBD2 and, where required on certain models, EEPROM and ECU/immobiliser programming.

5. Thorough testing and handover

• We test remote locking range, verify the immobiliser accepts the key, and confirm engine start.
• We advise on care and provide any warranty details for the key or repair.

Wherever possible, we use non-destructive methods. In rare cases where a component must be opened or a trim panel removed (for example, accessing an aerial/receiver), we’ll explain the risks and get your approval before proceeding.

For advanced programming details, you may also find our specialist page on Car Key Programming helpful.

Why Choose Our Slough Auto Locksmith Team

• Local and mobile across SL postcodes

  • Based in Slough and serving Langley, Burnham, Datchet, Windsor, Maidenhead, Eton, Gerrards Cross, and more. Efficient dispatch to your roadside, home, or workplace.

• 10+ years’ experience with modern systems

  • We work daily with Ford, Volkswagen, BMW, Mercedes-Benz, Audi, Vauxhall, Toyota, Nissan, Kia, Hyundai, Peugeot, Renault, Skoda, Volvo, Land Rover and many others. See the full list of brands we cover.

• Dealer-level diagnostics and equipment

  • OBD2 diagnostics, EEPROM where appropriate, immobiliser and ECU programming, laser key cutting, and remote RF testing.

• Trusted, insured and vetted

  • Public liability insured and DBS-checked technicians. Clear explanations before any work. Warranties on new keys and our workmanship.

• Non-destructive approach

  • We prioritise non-destructive entry and repairs. Any unavoidable exceptions are discussed first.

• Convenient and cost-effective

  • Avoid the delay and inconvenience of dealer appointments and towing. We come to you, often the same day.

If you’re locked out due to a dead fob, our mobile car unlock service in Slough can gain entry quickly and safely.

What We Can Do For Different Key Types

• Standard remote keys

  • Battery changes, button pad repair, remote re-synchronisation, transponder testing, and key blade cutting.

• Flip keys

  • Hinge repairs, new shells, switch replacement, and key blade replacement with accurate cutting.

• Smart/proximity keys (push-to-start)

  • Smart key programming, proximity key replacement, keyless entry programming, and resolving “Key Not Detected” issues including antenna ring and start button diagnostics.

• Commercial and van keys

  • Robust solutions for vans and fleets, including Ford Transit, Vauxhall Vivaro, VW Transporter, Mercedes Sprinter. Ask about our Van & Commercial Locksmith service.

Preventing Future Key Fob Problems

A few simple habits can extend the life of your fob:

• Replace the battery at the first sign of reduced range or intermittent operation
• Keep the fob dry and away from heat sources; use a small protective case
• Avoid heavy keychains that stress flip mechanisms and ignition barrels
• If your car battery has been flat, test the fob soon after a recharge
• Address intermittent faults early before solder joints or switches fail completely

Related Services And Next Steps

Depending on your situation, you might also need:

• A spare or replacement key to avoid future lockouts: see our car key replacement in Slough.
• Dedicated programming and immobiliser solutions: visit Car Key Programming.
• If you’re not sure what the issue is, browse our auto locksmith services in Slough or contact our Slough team for advice.

FAQs

Why has my key fob stopped working all of a sudden?

The most common reason is a flat key fob battery. Other causes include a desynchronised remote after battery change, water damage, or a transponder/immobiliser fault. We can test the fob’s radio signal, check the transponder, and re-pair it to the vehicle if needed.

My car says “Key Not Detected”. What should I do?

First, try holding the fob near the start button or the marked area in the owner’s manual; many cars have a backup detection point. If it still won’t start, the fob battery or transponder might be at fault, or the car’s antenna ring could be failing. We can diagnose and resolve this on site with our OBD2 tools.

Can you fix a water-damaged key fob?

If addressed quickly, light moisture damage can sometimes be cleaned and repaired, especially if only the buttons are affected. Severe corrosion or a damaged chip usually requires a replacement fob that we will program to your car.

Can you reprogram a used key fob?

It depends on the make and model. Some brands allow reprogramming if the fob is virgin or can be unlocked; others cannot be reused once coded. We’ll advise the best route, which may involve EEPROM or ECU/immobiliser programming on certain vehicles.

How long does it take to repair or replace a key fob?

Simple fixes like a battery and re-sync may take minutes. Repairs typically take 30–60 minutes. Full replacement and programming usually takes between 30 and 90 minutes, depending on vehicle brand and system.

Is this cheaper and quicker than going to a dealer?

Often yes. As a mobile service, we come to you, so there’s no towing or waiting for workshop slots. We also handle programming on site. For guidance on cost considerations, see our page on auto locksmith prices in Slough.

Our Service Area Across SL Postcodes

We provide mobile assistance throughout Slough and nearby areas including Langley, Cippenham, Salt Hill, Chalvey, Britwell, Colnbrook, Poyle, Windsor, Eton, Eton Wick, Datchet, Old Windsor, Maidenhead, Taplow, Burnham, Farnham Common, Iver, Richings Park, and Gerrards Cross. Wherever you are in the SL postcode region, we’ll dispatch an experienced car locksmith promptly with the right tools and parts.

Peace Of Mind And Guarantees

• Public liability insurance and DBS-checked technicians
• Warranty on new keys and our programming work
• Transparent advice before any repair or replacement
• Non-destructive methods wherever possible

If your key fob has failed completely and you’re locked out, please call us for urgent help. For non-urgent issues, we’re happy to provide clear guidance and a no-obligation quote.

Need help now? Call 01753 303 101 or Email us.

Helpful links

• Auto locksmith services in Slough
• Car key replacement Slough
• Car key programming
• Contact our Slough team