Protect the Two Most Vulnerable Electronic Modules in Your Mercedes Sprinter:
EIS Ignition Module and CPC Central Gateway Module
Applicable to: 2019-2026 Model Years, both gas and diesel engines, Left & Right side steering wheel
Ignition Module (EIS/EZS)
Sprinter owners know the horror stories:
Driving home, parked overnight, or in the middle of nowhere — suddenly the van throws:
"DO NOT SHIFT GEARS"
And you're stuck.
In many cases, the problem starts with moisture entering the ignition module. This unit sits low on the left kick panel and controls key communication, immobilizer, and module authorization.
It's basically the gateway brain of the van.
And Mercedes didn't waterproof it.
If moisture gets inside, the module fails, and there is no repair option.
Replacement often costs $2,000+ and can leave you waiting days or weeks to get back on the road — even with insurance.
CPC Module (Central Powertrain Controller)
The CPC is one of the main communication hubs in the Sprinter platform, responsible for managing and routing critical CAN bus communication between drivetrain, transmission, engine, ABS, ESP, and multiple control units throughout the vehicle.
Together, the EIS and CPC form a unified gateway communication network for the van.
And just like the EIS, the CPC module is not waterproof in any way.
Water intrusion, condensation, or accidental spills can easily reach the module area and potentially cause corrosion, communication failures, no-start conditions, transmission lockout messages, and expensive repairs.
Whether you use your Sprinter for work, travel, camping, or off-road adventures - electronics mounted low in the cabin remain vulnerable.
A single water event can leave you stranded and lead to thousands of dollars in repairs, programming, towing, and downtime.
The CPC Shield adds an extra layer of protection where Mercedes should have added one from the factory.
Mercedes' fix?
A thin plastic bag that doesn't fully cover the module, doesn't seal wiring, and doesn't hold up to real-world conditions.
We see these failures in the shop — so we built a real solution.
One Kit. Complete Protection.
Protect your Sprinter's two most vulnerable electronic modules with a single, easy-to-install solution engineered specifically for your van. Built to last. Designed to fit. Ready for the road.
Our new V2.0 UPDATED design
We take your feedback seriously that why we made - Ignition Protection Shield V2.0 🔧
Important changes:
✔️ New snap system
- No screws, no gears, no tools.
- Just snap it in, and you’re done.
✔️ Better fitment
- We tightened everything up so it sits exactly how it should - solid and secure.
✔️ Easier install position
- Now it sits away from the wall and snaps right onto the studs
- Way easier to install, cleaner result.
✔️ Updated water shield
- Clicks on top and stays in place - simple and reliable.
✔️ MID City Engineering dongle version available now
Main goal here was simple -
make it DIY-friendly and easy, without compromising quality.
Full-coverage carbon-reinforced protective housing + wiring connector shield
Wiring Connector Shield covers the entire connector and reroutes existing wiring
TPU-printed integrated seal around the perimeter
Protects the module and both wiring connectors
Blocks moisture, splash, and condensation entry
OEM mounting location
DIY-Friendly — can be installed in 10 minutes — with NO tools.
CPC Module Shield
✔ OEM-style fitment
✔ High-temperature engineering-grade material
✔ Quick installation
✔ Service-friendly design
✔ Shields the CPC from moisture, splashes, and debris
Tested in real conditions
We don't just design parts — we stress-test them CONTINUOUSLY:
- Water exposure test
- Fitment road vibration test
- Load test
Built in our Sprinter workshop in Washington, USA
What's Included
- EZS Shield — assembled
- CPC Module Shield
- NEW: Wiring Shield (included)
- Installation guide
Lifetime Hassle-Free Warranty
Like every SprinterArmor product, the Electronics Protection Kit is built to solve a real problem—not become another one.
If there's ever an issue with the product, we'll make it right.
Protect Both. Worry Less.
One kit.
Two critical modules.
Extra protection where Mercedes should have added it from the factory.
Drive confidently — your ignition is protected.
Designed to save you thousands and keep you moving.
Engineered by Sprinter professionals.
Proven in real vans.
All SprinterArmor products are designed and built in small batches at our shop.
Processing time: 1–5 business days
Shipping: Free shipping on all orders within the United States
Carriers: UPS
Delivery time: Typically 3–4 business days after shipment
Tracking information is provided once your order ships
During high-demand periods or product launches, processing times may be slightly longer. Any extended lead times will be clearly noted on the product page.
Returns
We accept returns within 30 days of delivery under the following conditions:
The item must be unused and uninstalled
Item must be returned in its original condition
All original hardware and packaging must be included
To initiate a return, please contact us first:
📧 support@sprinterarmor.com
Installed, used, modified, or custom items are not eligible for return.
Refunds
Approved refunds are issued to the original payment method
Refunds are processed within 5–7 business days after inspection
Return shipping costs are the responsibility of the customer unless the return is due to a manufacturing defect or our error
Warranty
Every SprinterArmor product includes a lifetime hassle-free warranty against manufacturing defects.
If a product fails due to materials or workmanship, we will repair or replace it.
Warranty does not cover normal wear, improper installation, or misuse.
Great product
Thank you kindly, George!
We appreciate your feedback!
Bought the Ignition Module and CPC shields. Had a few questions during the install, and Elaina and Vitaliy were responsive and helpful. Products seem solid and I have that peace of mind now that moisture/condensation intrusion won't create electronic issues and big repair bills!
Thank you kindly, Robert, for your feedback! We are glad Elaina & Vitaliy were responsive and helpful. Moisture/Condensation protection - that's what we aim for with the Ignition Module and CPC Covers. Enjoy the upgrade and peace of mind! We appreciate You!
Installed this on a 2022 Sprinter 3500HD Cab Chassis RV and it was Plug & Play (actually press, click & play). The product is well made. If you’ve never disassembled your Sprinter under-dash area, I recommend you watch their videos 1st to prevent breaking something like the OBD connector. Custom Service is Excellent!!!
Thank you kindly for taking the time to share this, and we’re really glad to hear the install went smoothly on your 2022 3500HD Cab Chassis. “Press, click & play” is exactly what we aim for, so it means a lot to hear that from someone working under the dash of an RV build.
We also appreciate you pointing folks toward the videos — that under‑dash area can be tricky the first time, and we try hard to make the process as stress‑free as possible.
And thank you for the shout‑out on customer service. We’re always here to help keep your Sprinter protected and your travels comfortable. Enjoy the peace of mind out on the road!
My installer said it is a great product to protect the ignition module. However, when using with Mid-City Engineering Remote Start the wires were not long enough to allow us to put the top piece on, which would have the water roll off. Instead, ended up placing a plastic bag where the top piece should have gone.
Thank you so much for the feedback, and we’re really glad to hear your installer liked the product. The Mid‑City Engineering remote‑start harness can sit tighter than OEM on some vans, which sometimes reduces the clearance needed for the top water‑shield piece. They also have different connectors, which we then have to customize based on the customer's needs.
We definitely don’t want you relying on a plastic bag for long‑term protection. If you reach out to us, we’d be happy to take care of this for you — we can either take a quick look at a photo of your setup and send you a modified version of the water shield that’s designed to fit your installation. We look forward to hearing from you.
I received your product and installed. Wanted to give an additional heads up that there was some fitment issues. Due to a ground stud location I was unable to use the original mount studs. The stud contacted the top wire cover before the module would more forward enough to enable the top mount stud. I was able to move the module towards the aft and mount with some screws. I would provide pics but honestly they don’t show it very well. Just letting you know as a heads up that sometimes there maybe mounting stud discrepancies.
Thank you very much for taking the time to share this. Your note about the ground stud interference is really helpful — Sprinters do have some small variances from year to year, and it sounds like yours had the stud positioned just far enough forward to affect the top mount alignment. We are glad you were still able to get everything secured by shifting the module, and we appreciate you flagging the discrepancy so we can keep refining the fitment guidance. Now you can have peace of mind knowing your ignition is protected from moisture. Take care!
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