





🚗 Upgrade your dash, keep your vibe — stay connected, stay classy.
The PAC RP4-CH21 RadioPRO4 Interface is a precision-engineered CAN Bus all-in-one radio replacement solution for select 2013-2018 Dodge, Jeep, and Ram vehicles. It preserves factory steering wheel controls, amplifier functionality, and seat controls, enabling a seamless aftermarket radio upgrade with plug-and-play ease and reliable performance.
| ASIN | B00LMGSVZM |
| Best Sellers Rank | #129,961 in Automotive ( See Top 100 in Automotive ) #170 in Automotive Replacement Radio Electrical Accessories |
| Customer Reviews | 4.2 4.2 out of 5 stars (204) |
| Date First Available | July 8, 2014 |
| Height (inches) | 2 inches |
| Is Discontinued By Manufacturer | No |
| Item Weight | 8.1 ounces |
| Item model number | RP4-CH21 |
| Product Dimensions | 8.5 x 8 x 2 inches |
| Warranty | 1 Year |
D**O
Perfect fit for 2014 ram 3500
Works great directions had color and source of each wire labeled. Made install super easy.
J**S
2015 dodge dart
A must have for aftermarket radio easy install plug and play gives you everything needed to keep all functions as factory
K**T
Plug and play, works great!
Once you connect your head units harness(via solder, crimp, the ol twist and tape, or whatever you do) it is plug and play! Retained my steering wheel controls and gained the attenuation mode on my pioneed head unit! Works great so far
A**R
Good kit
This kit was great worked perfectly for my 2019 ram classic only gave 4 stars because I didn’t need the pac due to no steering wheel control and didn’t see an option with out the pc
K**V
👌🏻
👌🏻
M**R
Not a plug and play solution, not for me anyway
I bought this thinking it would be plug and play but it wasn't. I needed to attach this to my PC to update and program it properly. The cable needed to do so is $50.00. Do yourself a favor and look for a Maestro brand unit. In my case the Maestro unit was $20.00 more but included the $50.00 cable to attach to a PC. So when you factor in the extra cost for the cable the Maestro was $30.00 cheaper. Not only that the Maestro unit does more by also including a cable that plugs into your OBD2 port and displaying extra information on your radio screen.
C**E
Does its job
Fits for 2016 Dodge Dart and connects easily. Manual is really easy to understand too
S**A
Poor instructions but works great
Worked great but the instructions weren’t good it needed more information on which wire goes to which
A**N
Bought a bunk radio and I think it shortage the PAC out as it did not work anymore
K**M
Installed on a 2017 Ram Promaster but the SWC interface doesn't work. Contacted PAC and they are unaware of a fix.
Trustpilot
1 day ago
3 weeks ago