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Compustar CS4900-S 2-Way Remote Start and Keyless Entry System

Curated from 107 real Reddit conversations

Refreshed on: March 11, 2025

Compustar CS4900-S 2-Way Remote Start and Keyless Entry System

Brand: Compustar

Price: $109

Snoop Score:

6.6

Sentiment

5.5

Popularity

3.8

Technical

8.6

Buy on Amazon for $109 See All Remote Starters Reviews

As an Amazon Associate, I earn from qualifying purchases.

Snoop's Take

The Compustar CS4900-S (4900S) is a 2-way remote start and keyless entry system designed for modern vehicles, providing a convenient range of 3000 feet. Users have praised its reliable performance, with one stating, "the range is fantastic and it’s worked great for 3 years so far," highlighting the quality of both the product and its dedicated fob. While the system offers significant security and ease of use, potential buyers should be aware of the high installation costs and complexity, making it essential to consider professional installation to fully enjoy its features. The product is recommended for those looking for a robust remote start solution, especially in colder climates where remote start functionality can be a lifesaver. However, potential users should factor in installation costs and possible compatibility issues with older vehicle models before making a purchase.

Not for you? Check out our other rated Remote Starters

the extra fob is pretty good, up to 400ft.
Positive Feedback

it doesn't have that great of a range from what my sales person said.
Negative Feedback

6.6

Compustar CS4900-S 2-Way Remote Start and Keyless Entry System

Buy on Amazon for $109

Winter Warm-Up

1 / 10

Convenient Access

2 / 10

Enhanced Security

10 / 10

Plug-and-Play Installation

2 / 10

See how this compares to all Remote Starters

What it does well!

Key strengths users can’t stop talking about.

Good range with dedicated fob

“the extra fob is pretty good, up to 400ft.”➕

“It also came with a long range dedicated fob.”➕

“the starter comes with.”➕

“because WINTER IS COMING and I live in the Upper Midwest.”➕

Solid product quality but requires skilled installation

“The product is solid, but requires skilled installers too.”➕

“The product is solid, but requires skilled installers too. Keyfobs will not need to be re-paired ”➕

Remotes hold programming for a long time

“The remotes will hold their programming for a long while.”➕

Increased security and convenience for modern vehicles

“The extra security and convenience it offers is what a modern turbo car should have imho.”➕

Reliable performance over time

“I've had a compustar remote starter on my vehicle that has been running flawlessly for 3 years.”➕

Convenient remote start features

“Mind you it includes install and all the needed parts.”➕

“But compustar has remote start features but I don't know much about them beyond that...”➕

“You can start the heater with the phone app, SMS or your key fob 😁”➕

User-friendly app with superior features

“The app is miles ahead of the Mazda one.”➕

“It’ll tell you the battery voltage, if any doors are open, a GPS location of the vehicle and the temperature in the car.”➕

Fantastic range and reliable performance

“The range is fantastic and it’s worked great for 3 years so far.”➕

New remote can completely replace OEM remote.

“the new remote can completely replace your OEM remote.”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.

Limited range of original fob

“it doesn't have that great of a range from what my sales person said.”➕

Potential battery drain with additional modules

“Not getting the drone so I think my battery drain will be minimal.”➕

High installation costs for the system

“I'm struggling to figure out how installation is over 1k.”➕

Inconsistent range performance

“I have to be like 50 feet away in the above scenarios for this thing to work.”➕

“The minute you have any kind of interference that rated distance can drop significantly.”➕

“Anything between you and the car could (and probably will) restrict range.”➕

“You’re never going to get 3,000 feet out of that remote despite what they advertise it as.”➕

Potential installation complexity and issues

“What's it mean when the installer says the got to flash the system.”➕

Complex installation process

“I highly recommend buying one through a dealer and having them install it.”➕

High installation costs

“I sell it like this to my clients to Dave em the money too.”➕

Monthly subscription fees for app usage

“Starts at $5.99/month, goes up to $11.99.”➕

Potential upcoming features in newer models

“So definitely hold off if you have one of the qualifying models.”➕

Older systems may have compatibility issues

“whenever I open the door or trunk the car turns off.”➕

Car turns off when door or trunk is opened with older fobs

“Car only turns off if I don't hit the break within 45 seconds of opening the doors.”➕

Monthly fee for phone remote start option.

“You could always do the one you can do on your phone. Has a monthly fee though.”➕

Complex installation issues with Best Buy

“I wouldn't recommend Best Buy as an installer for any car accessories.”➕

“If it’s not installed from the dealership, then don’t do it (for remote starts).”➕

Potential security risks with immobilizer

“Essentially it becomes far simpler to hot wire the car.”➕

High installation costs and complexity

“This completely defeats the purpose of an immobilizer.”➕

“Absolutely, positively, under no circumstances should you EVER have ANYTHING installed by Best Buy.”➕

Compare On All Talked About Dimensions

Product Name	Price	Score	See Details	Buy Now
Start-X Remote Starter Kit for Jeep Wrangler 2007-2018	$132	7.6	Details	Buy
Innova 3630 Remote Starter Switch	$17	7.3	Details	Buy
Start-X Plug N Play Remote Starter Kit for Chevy Silverado & Sierra	$212	7.3	Details	Buy
Compustar CS7900-AS All-in-One Remote Start and Alarm	$159	7.2	Details	Buy
Compustar CS920-S 1-Way Remote Start and Keyless Entry System	$64	7.1	Details	Buy
Start-X Remote Starter for Jeep Wrangler & Gladiator	$143	7.0	Details	Buy
Compustar CSX4900-S Remote Start System	$140	6.7	Details	Buy
Compustar CS4900-S 2-Way Remote Start and Keyless Entry System	$109	6.6	Details	Buy
Start-X Remote Starter for Dodge Grand Caravan & Chrysler	$149	6.6	Details	Buy
Start-X Complete Remote Starter kit for Toyota Tundra	$206	6.5	Details	Buy
Start-X Remote Starter for Ford Fusion 2014-2021	$121	6.2	Details	Buy
Start-X Remote Starter Kit for Ford Escape 2008-2019	$163	6.1	Details	Buy
Start-X Remote Starter Kit for RAM 2500/3500 (2019-2024)	$221	6.1	Details	Buy
Start-X Remote Start Kit for Honda Civic 2012-2015	$221	6.1	Details	Buy
Start-X Remote Starter Kit for Chevy Silverado/GMC Sierra	$204	5.8	Details	Buy
Start-X Remote Starter Kit for Mazda Vehicles	$288	5.7	Details	Buy
Start-X Plug N Play Remote Starter Kit for Toyota 4Runner	$205	5.7	Details	Buy
Start-X Plug N Play Remote Starter for 4Runner and Sienna	$165	5.6	Details	Buy
Start-X Remote Starter Kit for Ford Vehicles	$110	5.2	Details	Buy
Start-X Remote Starter Kit for Toyota RAV4 (2019-2021)	$212	4.9	Details	Buy
MPC Remote Start Kit for Toyota Highlander 2014-2019	$139	4.6	Details	Buy
Generic Car Remote Engine Start Remote Starter	$79	2.7	Details	Buy

Core Power Plays

The specs and strengths that make it shine.

Importance of vehicle year, make, and model.

“Vehicle Year Make and Model is quite important to answer your question.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’

Dealer installation may be required for full functionality

“No way to use the app for free and no way to use the fob without the additional hardware.”➕

“How I made $21k on Side Hustles After my last couple comments on r/sidehustle brought in a lot of qu”➕

Installation prices vary significantly by location

“Nice. My local shop quoted me 700$ for the same system.”➕

Questions about vehicle compatibility and setup requirements

“For the remote start, do you have to leave your car in neutral all the time?”➕

Advice on troubleshooting electrical issues

“the fact that the lock and lock don't work tell me its either blown fuses are the the brain took a crop during the Jumpstart.”➕

“You are a lifesaver! I really appreciate your advice!”➕

“I’m no expert but it sounds to me like the brain is fried.”➕

Installation times vary greatly by vehicle

“Depends a lot on the vehicle and some on the skill of the installer.”➕

“I would wager like 1-1.5 hours.”➕

Compatibility concerns with specific vehicles

“Hey would it be easy for me to install the Compustar 925s on my 2007 Subaru Impreza?”➕

Questions about vehicle compatibility and features

“Potential replacement for the mymazda app.”➕

Researching installation options and costs

“Just researching what's best for me and pricing and all that.”➕

Installation may be tricky for some systems

“the whole installation which can be some what tricky.”➕

Questions about software update availability

“Do you know where I can look for software updates and how to install them?”➕

Curiosity about features in competing brands

“I just had a Viper installed...wonder if there firmware will ever be updated to add the same feature.”➕

Need for a security system depends on specific requirements.

“I'm gonna say you should probably go talk to whoever you are buying from / having install and figure out what's going to work best for you.”➕