2017-2020 Honda Ridgeline Key Fob: Programming, Known Issues, and Replacement Costs

Symptoms of a Failing Keyless Entry Transmitter

Before assuming the key fob itself has failed, the first and most common step is to replace its internal battery. A weak or dead battery is the cause of most keyless entry issues. If problems persist after replacing the battery, you may have a faulty transmitter.

• "Keyless Access System Problem" Message: The multi-information display (MID) in the instrument cluster may show this specific error message. While this can indicate a fob issue, it can also be caused by a problem with the vehicle's push-to-start button or the Keyless Access Control Unit.
• Intermittent or No Response: The vehicle may not respond when you press the buttons on the fob, or it may only work sporadically. You might have to get much closer to the vehicle than usual for it to work.
• Vehicle Won't Detect the Key: You may be unable to start the truck, with the push-to-start button being unresponsive. Often, holding the fob directly against the start button 🎬 Watch: How to start your Ridgeline with a dead key fob can serve as a temporary workaround, as this uses a very short-range antenna to read the fob's chip, even with a dead battery.
• Doors Won't Lock/Unlock Passively: The feature that allows you to lock or unlock the doors by touching the handle may stop working, even if the buttons on the remote still function.

Known Issues, TSBs, and Recalls

While there are no specific recalls for the keyless entry transmitter itself, Honda has issued Technical Service Bulletins (TSBs) related to the keyless access system that owners should be aware of.

• TSB 20-117: For 2017 Ridgeline models, Honda issued a warranty extension for a faulty Engine Start/Stop switch. Symptoms include the vehicle not starting on the first button press and a "KEYLESS START SYSTEM ERROR" message on the dash, along with diagnostic trouble code B12C5. The warranty was extended to 9 years or 125,000 miles.
• TSB 21-055: This bulletin addresses an issue on 2017-2019 Ridgelines where the factory security alarm goes off intermittently. The cause is identified as an internal failure within the Keyless Access/TPMS Control Unit. The repair involves replacing the control unit and requires all vehicle keys to be present for reprogramming.
• Other Recalls: The 2017-2020 Ridgeline has been subject to other recalls, such as for a faulty hood latch and a tonneau cover, but these are unrelated to the keyless entry system.

Buying a Used 2017-2020 Ridgeline Key Fob

Purchasing a used OEM key fob can be a cost-effective alternative to buying a new one from a dealership. However, there are critical details to verify to ensure compatibility and avoid wasting money.

1. Match the FCC ID: This is the most important step. The correct FCC ID for this Ridgeline is KR5V2X. This ID is printed on the back of the remote. A fob with a different FCC ID will not program to your vehicle.
2. Verify the Button Configuration: Ensure the used remote is a 4-button fob with Lock, Unlock, Remote Start, and Panic functions. Fobs from other Honda models may share the same FCC ID but have different button layouts (e.g., a trunk release button instead of remote start) and will not be fully compatible.
3. Check Part Numbers: The known OEM part numbers are 72147-T6Z-A11, 72147-T6Z-A21, and 72147-T6Z-A31. These are often revisions and are generally interchangeable as long as the FCC ID and button layout match.
4. Inspect for Damage: Check for cracks in the casing or signs that it has been pried open aggressively, which could indicate internal damage.

Programming: A Professional Is Required

Unlike older vehicles, the 2017-2020 Honda Ridgeline has no on-board, do-it-yourself programming procedure for its smart keys. Programming must be done by a professional with specialized equipment.

• Dealer vs. Locksmith: Both Honda dealerships and qualified automotive locksmiths can program a new key fob. Locksmiths are often significantly cheaper and can offer mobile service, saving you a trip to the dealer.
• Required Equipment: Programming involves connecting a diagnostic tool, like the Honda HDS (Honda Diagnostic System), to the vehicle's OBD-II port to register the new key with the immobilizer and body control module.
• Bring All Your Keys: When a new key is programmed to the vehicle, all existing keys must also be present. The technician will reprogram all keys in a single session to ensure they all remain synced with the vehicle's security system.

Cost Comparison for Ridgeline Key Fob Replacement

Prices can vary based on location and supplier, but this provides a general estimate for replacing a single key fob.

Technical Specifications

Frequently Asked Questions (FAQ)