2018 Honda Civic Key Fob Programming Guide
AI-generated reference. Always verify torque values, fluid capacities, intervals, and procedures against the manufacturer's service manual or OEM repair information before performing work. Repairius is not liable for damage from acting on this content without verification.
Working on this 2018 Honda Civic? Run just this one job through Repairius.
No big switch. Write the estimate, text it for approval, and get paid on your phone. Keep everything else the way it is.
14-day free trial · credit card required · cancel anytime
Quick reference
| Item | Detail |
|---|---|
| FCC ID | ACJ876E04A |
| OEM Fob PN | 72147-TBA-A01 (4-button), 72147-TBA-A11 (5-button, Hatchback/Si/Type R) |
| Aftermarket Options | Available from various brands; ensure compatibility |
| Battery Type | CR2032 |
| Programmable On-Board? | No (requires scan tool) |
| Cuts Required? | Yes (for integrated key blade) |
Step-by-step on-board programming
Unfortunately, the 2018 Honda Civic does not support DIY on-board programming for its key fobs. The vehicle's computer system requires a specialized scan tool to program new key fobs. This means you will need to visit a Honda dealership or a qualified automotive locksmith to have a new key fob programmed.
Attempting to program a new key fob without the correct equipment can potentially cause issues with your vehicle's immobilizer system, rendering it unable to start.
Battery replacement
- Locate the small release button or switch on the side of your key fob. Press it to release the emergency key blade. Pull the key blade out.
- With the key blade removed, you'll see a small slot or indentation inside the key fob case. Use a small flat-head screwdriver or a coin to carefully pry open the two halves of the key fob case.
- Gently separate the two halves. Be careful not to dislodge any internal components.
- Locate the CR2032 coin cell battery. Note its orientation (which side is up).
- Carefully remove the old battery, using a small non-metallic tool if necessary to lift it out.
- Insert the new CR2032 battery, ensuring the positive (+) side is facing the same direction as the old battery.
- Align the two halves of the key fob case and press them firmly together until they snap shut.
- Reinsert the emergency key blade into the key fob.
Test the functionality of your key fob to ensure all buttons are working correctly.
Where to buy a replacement fob
-
Honda Dealership:
- Pros: Guaranteed genuine OEM part, expert programming, warranty. They will have the correct key blade for cutting and the necessary scan tools.
- Cons: Most expensive option. Expect to pay anywhere from $200-$400+ for the fob and programming.
-
Automotive Locksmith:
- Pros: Often more affordable than a dealership, many locksmiths have the same programming equipment as dealerships, can cut and program on-site (mobile service available). They may offer both OEM and quality aftermarket options.
- Cons: Quality can vary; ensure they specialize in automotive keys and have good reviews. Prices typically range from $150-$300 for the fob and programming.
-
Online Retailers (Amazon, eBay, etc.):
- Pros: Cheapest option for the physical fob. You can find OEM and aftermarket fobs for significantly less than a dealership.
- Cons: You still need to pay for programming and key cutting separately. There's a risk of purchasing non-compatible or low-quality fobs. You cannot program these yourself for a 2018 Civic. Expect to pay an additional $80-$150 for programming and cutting from a locksmith or dealership.
If on-board programming isn't supported
As mentioned, the 2018 Honda Civic requires a professional scan tool for key fob programming. This is due to the vehicle
More specs for the 2018 Honda Civic
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Same spec — other model years
Maintenance & repair guides
2018 Honda Civic Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
Browse by make
Running an auto or diesel repair shop?
Compare Repairius to the shop software you're paying for
$99.99/month (first location included), unlimited users, 14-day free trial.