2021 Mercedes-Benz Sprinter Key Fob Programming
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 | IYZ-MS1 |
| OEM Fob PN | 907-905-50-01 |
| Aftermarket Options | Autel, XHorse, Zed-Full |
| Battery Type | CR2032 |
| Programmable On-Board? | No |
| Cuts Required? | Yes, laser-cut |
Step-by-step on-board programming
The 2021 Mercedes-Benz Sprinter does not support on-board, DIY programming for new key fobs. This is due to the sophisticated anti-theft system that requires specialized diagnostic tools to pair a new key to the vehicle's electronic ignition switch (EIS) and engine control unit (ECU).
To program a new key, you will need to contact a Mercedes-Benz dealership or a qualified automotive locksmith who has the necessary equipment, such as an Autel IM608, X-Tool, or AVDI, to perform the procedure.
Battery replacement
Replacing the battery in your Sprinter key fob is a simple process you can do at home.
- Slide the release latch: Locate the small silver button on the back of the key fob. Slide and hold it to release the emergency metal key.
- Remove the emergency key: Pull the metal key blade out of the fob housing.
- Access the battery tray: Insert the tip of the emergency key into the opening created by removing it. Gently pry open the back cover of the fob.
- Replace the battery: The fob uses a single CR2032 battery. Note the orientation of the old battery before removing it. Place the new battery in the same position, with the positive (+) side facing up.
- Reassemble the fob: Snap the back cover into place, and reinsert the emergency key.
Where to buy a replacement fob
- Mercedes-Benz Dealership: This is the most expensive option, often costing between $500 and $800 for a new key, programming, and cutting. However, you are guaranteed an OEM key that will work seamlessly with your vehicle.
- Automotive Locksmith: A qualified locksmith with Mercedes key programming capabilities can often provide a new key for a lower price, typically in the $300 to $500 range. They may offer OEM or high-quality aftermarket fobs.
- Online (Amazon, eBay): While you can find key fob shells and uncut blades online for a low price, these do not contain the necessary transponder chip for programming. We strongly advise against purchasing used or "unlocked" fobs online, as they can rarely be reprogrammed to a different vehicle.
If on-board programming isn't supported
As mentioned, the 2021 Sprinter requires professional programming. The key contains a transponder chip that is part of the vehicle's immobilizer system. During programming, the technician uses a scan tool to connect to the vehicle's OBD-II port, read the data from the EIS, and then "teach" the vehicle to recognize the new key. This is a security measure to prevent unauthorized key duplication and vehicle theft.
The cost for this service is high due to the expensive, specialized equipment and software subscriptions required to work with Mercedes' advanced security systems.
Find a mobile locksmith or shop on Repairius.
More specs for the 2021 Mercedes-Benz Sprinter
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
2021 Mercedes-Benz Sprinter 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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