Lost Key Fob high urgency

Lost Key Fob for a 2024 Acura RDX (US): What to Do Next

Losing the key fob for a 2024 Acura RDX can leave you stranded and worried about vehicle security. The good news: replacements are available through Acura dealers and qualified automotive locksmiths, and you can reduce risk quickly with a few steps.

Understanding Your Situation

Your RDX uses a proximity “smart” key fob that must be programmed to the vehicle. When a fob is lost, it may still be able to unlock/start the car if it’s nearby, so it’s important to disable missing keys and add new ones as soon as practical.

🚀 Immediate Steps to Take

  1. Search strategically: retrace steps, check common drop zones (couch cushions, jacket pockets, gym bags), and use any tracking app/tag if attached to the fob.
  2. If theft is possible, secure the vehicle: park in a well-lit area/garage, remove valuables, and consider temporary deterrents (steering wheel lock).
  3. Arrange replacement and reprogramming: contact an Acura dealer or a reputable automotive locksmith to add a new fob and erase the lost one from the car’s memory.

Your Options

Acura dealer replacement (OEM smart key + programming)

Cost: $350-$700 Time: Same day / 1-3 days

The dealer supplies an OEM smart key fob and programs it to your 2024 RDX. They can typically erase lost fobs from the vehicle’s system and verify all remaining keys work properly.

âś“ Pros:
  • OEM parts and correct programming for your exact trim
  • Can delete lost keys from the vehicle for better security
âś— Cons:
  • Usually the highest cost option
  • May require towing or an appointment if you have zero working keys

Mobile automotive locksmith (smart key supply + programming)

Cost: $250-$600 Time: Same day

A qualified locksmith comes to the vehicle, provides a compatible smart key fob, programs it, and may be able to remove lost keys from the system depending on equipment and vehicle configuration.

âś“ Pros:
  • Convenient on-site service (often no towing needed)
  • Can be faster and sometimes cheaper than the dealer
âś— Cons:
  • Capability varies—confirm they can program 2024 Acura RDX smart keys and erase missing keys
  • Aftermarket fobs may have variable feel/warranty compared with OEM

Use your spare key now + replace the lost fob soon

Cost: $200-$600 Time: 1-3 days

If you still have one working fob, you can continue driving, but you should schedule programming to add a replacement fob and remove the lost one from memory.

âś“ Pros:
  • No immediate downtime if you still have a working fob
  • Often easier/cheaper to add a key when at least one working key exists
âś— Cons:
  • Security risk if the missing fob was stolen (it may still work until deleted)
  • If you lose the remaining fob, replacement can become more expensive and complicated

Insurance or roadside assistance pathway (if applicable)

Cost: $0-$700 (depends on coverage and deductible) Time: 1-7 days

If you have comprehensive coverage, key replacement coverage, or a roadside plan, you may be reimbursed for some costs or get assistance with towing/lockout. You still must have the new fob programmed to the vehicle.

âś“ Pros:
  • May reduce out-of-pocket cost
  • Can help with towing/transport logistics
âś— Cons:
  • Claims/deductibles and limits may apply
  • Does not eliminate the need for proper programming and key deletion

⚠️ What to Avoid

âś• Buying a random online fob without confirming it matches the 2024 Acura RDX US-market specifications and can be programmed (many listings are incorrect or previously locked).

✕ Delaying key deletion if theft is suspected—until removed from the vehicle’s system, a lost fob may still unlock/start the car under the right conditions.

✕ Using unvetted services that won’t provide proof of authorization/ownership or that quote unusually low prices without explaining parts, programming, and key-erasure steps.

⚠️ Common Mistakes to Avoid

  • Calling dealer first without getting quotes
  • Not checking insurance coverage
  • Rushing to tow to dealership
  • Not considering mobile locksmiths

Frequently Asked Questions

Can I drive my 2024 Acura RDX if I lost one key fob but still have another?

Yes. If you still have a working fob, the vehicle should operate normally. However, it’s smart to replace the missing fob and have it removed from the vehicle’s memory to reduce security risk and avoid being stuck if you lose the remaining fob.

Do I need to replace locks or the whole ignition if my RDX key fob is lost?

Usually no. Most cases are resolved by programming a new smart key and deleting the lost one from the vehicle’s system. Physical lock replacement is typically only considered if there’s evidence of forced entry or a separate mechanical key/security concern.

Will the dealer or locksmith be able to delete the lost fob so it no longer works?

In many cases, yes—this is commonly done during key programming. Ask specifically for “erase/remove all lost keys” or “key memory reset,” then confirm only the keys you have are active afterward.

What if I have zero working keys left?

You can still get a replacement, but it may take longer and cost more. The provider may need the vehicle present, proof of ownership, and may require towing to the dealer or an on-site immobilizer/key programming procedure by a qualified locksmith.

What do I need to bring to get a replacement key fob?

Bring a government-issued photo ID and proof of ownership (registration/title). Some providers may also require the vehicle present and your VIN.

⏱️ Urgency Note: If the fob was lost in a public place or you suspect theft, treat it as time-sensitive: secure the vehicle and arrange to delete the missing key from the RDX as soon as possible.

Related Information

Need Detailed Information?

Get vehicle-specific key fob compatibility, part numbers, and a complete price comparison for your 2024 Acura RDX.

View RDX Key Fob Guide →

Last updated: 2026-01-04