How to Install a Car Remote Start System
What remote start does and whether you can install it yourself
A remote start system lets you start your engine from outside the car using a key fob or smartphone app, usually from 100 to 1,000 feet away. The system wires into your ignition, starter, and sometimes your transmission or brake pedal to prevent the engine from turning over unless certain safety conditions are met.
Installation ranges from straightforward to complex depending on your vehicle. Some cars—particularly newer models with push-button start—require professional installation because the system must communicate with the car's onboard computer. Older vehicles with traditional ignition switches are often easier to wire yourself if you have basic electrical knowledge. Most people choose professional installation to avoid voiding the warranty or damaging the vehicle's electrical system.
Before you buy any system, check whether your car's transmission is manual or automatic. Remote start systems cannot safely start manual transmissions, since there is no way to confirm the clutch is fully disengaged. Automatic transmissions are safe because the car will not start unless the brake pedal is pressed or the gear shift is in Park.
Key Takeaways
- Remote start systems wire into your ignition and starter; installation difficulty depends on whether your car has push-button start or a traditional ignition switch.
- Manual transmissions cannot use remote start because the system cannot verify the clutch is disengaged, creating a safety risk.
- Professional installation costs between $300 and $800 depending on your vehicle and the system chosen, and protects your warranty.
- Aftermarket systems from brands like Viper, Compustar, and Avital are the most common choice; some dealerships also offer factory remote start as an add-on.
- Your car's electrical system must be in good condition before installation, and you should test the system in a safe location before relying on it.
Choosing between aftermarket and factory remote start
Aftermarket systems are sold by third-party manufacturers and installed by car alarm shops, Best Buy, or independent mechanics. Common brands include Viper, Compustar, Avital, and Crimestopper. These systems typically cost $200 to $500 for the unit itself, plus $100 to $300 in labor. Aftermarket systems often include additional features like trunk pop, door locks, or smartphone control, and you can usually transfer them to a new vehicle.
Factory remote start is built by the car manufacturer and installed at the dealership. It integrates directly with your vehicle's computer and is often more reliable on newer cars, especially those with push-button start. Factory systems usually cost $300 to $600 total and cannot be transferred to another vehicle. They are less likely to cause warranty issues because the dealership performs the work and takes responsibility for it.
If your car is still under warranty, check your warranty document or call the dealership before installing an aftermarket system. Some warranties allow aftermarket work if a certified shop does it; others do not. Installing a system at an unauthorized shop can void coverage for electrical or engine problems, even if the remote start itself did not cause the issue.
What to expect during professional installation
A professional installation typically takes 2 to 4 hours. The technician will remove panels from under the steering wheel and dashboard to access the ignition wires, then run new wiring through the firewall (the barrier between the engine and cabin) to connect to the starter and battery. For cars with push-button start or advanced security systems, the technician may need to connect the system to the car's CAN bus—a data network that lets the remote start module communicate with the engine computer.
The installer will test the system multiple times before you leave: first with the car parked and in neutral or Park, then from increasing distances to confirm the range. They will also program the key fob and show you how to use it. Ask the technician to write down the system model and any warranty information, and request a receipt that lists what was installed.
After installation, test the system yourself in a safe location like an empty parking lot. Start the engine remotely, confirm the doors lock and unlock as expected, and verify that the engine shuts off if you press the brake pedal or shift into Drive. If anything feels wrong—unusual sounds, warning lights, or the engine not turning off—return to the shop immediately.
DIY installation for older vehicles with traditional ignition switches
If you have an older car with a traditional key-turn ignition and you are comfortable working with automotive wiring, DIY installation is possible. You will need the remote start kit, a wiring diagram specific to your vehicle (usually included or available from the manufacturer), wire strippers, crimpers, electrical tape, and a multimeter to test connections.
The basic steps are: disconnect the negative battery terminal to prevent electrical shock, remove the steering column covers, locate the ignition wires, identify which wires control the starter and ignition, connect the remote start module's wires to those circuits using crimp connectors, run the new wiring through the firewall, connect to the battery, and test. However, if you make a mistake—reversing polarity, connecting to the wrong wire, or leaving a loose connection—you can damage the starter, drain the battery, or create a fire hazard.
Most people find that the cost of a professional installation ($300 to $800) is worth the safety and warranty protection. If you do attempt DIY installation, work in a well-lit space, take photos before you disconnect anything, and do not rush. If you get stuck, stop and take the car to a professional rather than guessing.
Wiring into push-button start and modern security systems
Cars with push-button start and keyless entry have a more complex electrical architecture. The ignition system is not a simple switch but a computer-controlled circuit, and the remote start module must communicate with the engine control unit (ECU) to confirm that conditions are safe before allowing the engine to start.
Professional installers use a CAN bus interface to tap into the vehicle's data network. This allows the remote start module to read signals from the brake pedal, gear shift, and door locks, and to command the engine to start only when the transmission is in Park and the brake is not pressed. Without this integration, the system cannot work safely or at all on many newer vehicles.
If your car has push-button start, do not attempt DIY installation. The risk of damaging the computer or creating a safety hazard is high, and a professional shop will have the correct interface and diagnostic tools. Many dealerships now offer factory remote start as an add-on, which is often the safest choice for newer vehicles.
Cost breakdown and what affects the price
The total cost of remote start installation ranges from $300 to $800 or more, depending on several factors. The system itself costs $200 to $500. Labor costs $100 to $300 and varies by location and shop reputation. If your car requires a CAN bus interface or has a complex security system, labor can run higher because the technician must spend more time diagnosing and programming.
Vehicles with push-button start, integrated security systems, or non-standard wiring layouts cost more to install than older cars with simple ignition switches. Luxury vehicles and some newer models may require specialized equipment or knowledge, pushing the total toward $800 or beyond. Some shops charge a flat rate; others charge hourly. Ask for a quote before you commit, and confirm what is included—some quotes cover only labor, while others include the system and a warranty on the work.
If you are buying a used car, ask the seller whether remote start is already installed. If it is, you may be able to transfer the system to your next vehicle, or the previous owner's documentation may help a technician troubleshoot it. If the system is not working, the cost to repair it is usually less than installing a new one.
Safety considerations and common mistakes
Remote start systems have built-in safety features, but they only work if the system is installed correctly. The most important safeguard is that the engine will not start unless the transmission is in Park (for automatics) or the clutch is fully disengaged (for manuals—though manual cars should not use remote start at all). The system should also shut off the engine if you shift into Drive or press the brake pedal.
A common mistake is installing a system that does not properly sense the brake pedal or gear shift. If the engine can start while the car is in Drive, or if it does not shut off when you press the brake, the system is unsafe and must be repaired immediately. Another mistake is running wires incorrectly through the firewall, which can pinch them and cause a short circuit or fire. Professional installers know how to route wires safely and use grommets and clips to protect them.
Never rely on remote start to warm up your car in an enclosed space like a garage. Running an engine in an enclosed area produces carbon monoxide, which is deadly. Remote start is meant for warming the car in an open driveway or parking lot before you get in. If your car has a battery drain problem or a weak alternator, remote start can make it worse by starting the engine repeatedly without the alternator running long enough to recharge the battery.
Frequently Asked Questions
Can I install remote start on a car with a manual transmission?
No. Remote start systems cannot safely start manual transmissions because there is no way to confirm the clutch pedal is fully disengaged. If the clutch is partially engaged, the car could lurch forward or stall unexpectedly, creating a safety hazard. Automatic transmissions are safe because the car will not start unless the gear shift is in Park.
Will remote start void my car's warranty?
It depends on your warranty terms and where the work is done. Factory remote start installed by the dealership will not void your warranty. Aftermarket installation at a certified shop usually will not either, but check your warranty document or call the dealership first. Installation at an unauthorized shop can void coverage for electrical or engine problems, even if the remote start did not cause the issue.
How far away can I start my car?
Most aftermarket systems work from 100 to 1,000 feet away, depending on the brand and model. Smartphone-based systems can work from anywhere if your car has cellular connectivity. Range is reduced by obstacles like buildings, trees, and metal structures. Test the range in your own driveway before relying on it in a parking lot or on the street.
What if my car battery is dead?
Remote start will not work if the battery is too weak to turn the starter. The system draws power from the battery just like the ignition switch does. If your battery is dead, you will need to charge it with jumper cables or a charger before remote start will function.
Can I transfer remote start to a new car?
Aftermarket systems can usually be transferred to a new vehicle, though you will need to pay for professional reinstallation. Factory remote start is tied to your specific vehicle and cannot be transferred. If you are buying a used car with aftermarket remote start already installed, ask the previous owner for documentation and have a technician verify it is working correctly before you rely on it.