2018 Nissan Altima 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.
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Quick reference
| Item | Detail |
|---|---|
| FCC ID | CWTWB1U825 |
| OEM Fob PN | 285E3-3TP0A, 285E3-4CB0A |
| Aftermarket Options | Look for compatibility with FCC ID CWTWB1U825 |
| Battery Type | CR2032 |
| Programmable On-Board? | No (Requires a scan tool) |
| Cuts Required? | Yes (for the emergency key blade) |
Step-by-step on-board programming
The 2018 Nissan Altima does not support DIY on-board programming for its key fobs. The vehicle's immobilizer system requires a specialized scan tool to program new or replacement key fobs. This process links the new fob's unique transponder code to the car's computer, ensuring secure vehicle operation.
To program a new key fob, you will need to visit a Nissan dealership or a qualified automotive locksmith who possesses the necessary diagnostic equipment.
Battery replacement
- Locate the small release button or tab on the side of the key fob and slide it to remove the emergency key blade.
- With the emergency key removed, you will see a small slot or notch. Use a flat-head screwdriver or a coin to carefully pry the two halves of the key fob apart.
- Gently remove the old CR2032 battery. Note the orientation of the battery (positive (+) side up or down) before removing it.
- Insert the new CR2032 battery with the positive (+) side facing the same direction as the old one.
- Align the two halves of the key fob and press them together until they click securely into place.
- Reinsert the emergency key blade.
Where to buy a replacement fob
- Nissan Dealership: While the most expensive option, a dealership ensures you receive a genuine OEM part and guarantees proper programming. Expect to pay anywhere from $250 to $400 or more for the fob and programming.
- Automotive Locksmith: Often a more affordable alternative to the dealership, locksmiths can provide and program replacement fobs. They typically charge between $150 and $300, depending on the locksmith and your location. They can also cut the emergency key blade.
- Online Retailers (e.g., Amazon, eBay): You can often find aftermarket key fobs compatible with the 2018 Nissan Altima for significantly less, sometimes as low as $30-$80. However, remember that these will still require programming by a locksmith or dealer, and the emergency key blade will need to be cut. Always verify the FCC ID (CWTWB1U825) and part numbers to ensure compatibility before purchasing.
If on-board programming isn't supported
As mentioned, the 2018 Nissan Altima requires a scan tool for key fob programming due to its advanced immobilizer system. This system uses a transponder chip embedded in the key fob that communicates with the vehicle's engine control unit (ECU). Without proper programming, the car's immobilizer will prevent it from starting, even if the key physically turns the ignition (if applicable) or allows door entry.
The cost for programming will be in addition to the cost of the key fob itself. Locksmiths generally offer the best balance of cost and convenience for this service. Be sure to get a quote that includes both the fob and the programming if you are purchasing from a locksmith.
Find a mobile locksmith or shop on Repairius.
More specs for the 2018 Nissan Altima
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 Nissan Altima Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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