A smart, always-on sensor module that watches your coolant reservoir so you don't have to — and sounds a loud alarm the moment levels drop into the danger zone.
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Product Demo Video — Coming Soon
How It Works
Simple, Reliable, Loud
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Plug In
Clip the Coolant Guardian sensor to your existing coolant reservoir. No specialized tools required.
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Always Watching
The module continuously monitors your coolant level, detecting any drop below the safe threshold in real time.
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Instant Alert
The moment coolant dips low, a loud audible alarm fires — giving you time to act before any damage can occur.
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Engine Protected
Pull over, top up, and drive on. Coolant Guardian just saved you thousands in potential engine repairs.
$200
That Protects Against $4,500+
A blown head gasket, cracked engine block, or seized pistons from overheating can run you thousands at the shop. The Coolant Guardian costs a fraction of a single repair.
The Problem Is Bigger Than You Think
Your Engine Is One Leak Away From Total Destruction
Every day, thousands of drivers unknowingly run their cars with dangerously low coolant. Most won't find out until it's too late — and the bill arrives.
$4,500
Avg Engine Repair From Overheating
AAA Automotive Research
62%
Of Roadside Overheats Caused by Coolant Loss
NHTSA Breakdown Data
$3.8B
Spent Annually on Cooling System Repairs in the US
IBISWorld Auto Repair
1 in 5
Drivers Are Currently Low on Coolant
Jiffy Lube Service Reports
⚠️
Your Dashboard Warning Light Is Already Too Late
Modern vehicle temperature warning lights only trigger after your engine has already begun to overheat. By the time that light comes on, you may have already warped your cylinder head, cracked a gasket, or seized your engine. Average cost to rebuild a seized engine: $7,000 – $12,000.
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Coolant Leaks Are Sneaky, Silent, and Deadly
Slow leaks from degraded hoses or microscopic reservoir cracks can bleed your coolant level down over days or weeks — completely invisibly. You won't smell it. You won't see it. Until you're stranded on the highway watching steam pour from under the hood, calling a tow truck that'll run you $150–$400 before you've even reached a mechanic.
What Happens When Coolant Runs Out
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Blown Head Gasket ($1,500–$3,000):Overheating warps the metal mating surfaces between your cylinder head and engine block. Once a head gasket fails, coolant and oil mix — and your engine is done.
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Warped Cylinder Head ($1,000–$2,500):Aluminum heads expand and distort under extreme heat. A warped head means loss of compression, misfires, and white smoke from your exhaust.
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Seized Engine ($5,000–$12,000):Without coolant, metal-on-metal contact generates catastrophic heat. Pistons can literally weld themselves to cylinder walls. At this point, your engine is scrap metal.
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Roadside Breakdown:Being stranded on a highway is dangerous. Towing fees, emergency markups, lost workdays, and rental cars add up fast.
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Total Vehicle Loss:For older or higher-mileage vehicles, the repair cost can exceed the car's value — meaning a coolant leak you ignored for two weeks just totaled your car.
The Coolant Guardian Changes Everything
🔔Instant Alarm
Blares an audible alert the moment coolant drops below safe threshold.
🔧Universal Fit
Designed to work with any vehicle that has an accessible coolant reservoir.
⚡Fast Install
Minor mechanical experience needed. Most installs complete in about 20 minutes.
💰Massive ROI
At $200, one prevented overheating incident pays for many units.
The Math Is Obvious
Scenario
Without Guardian
With Guardian
You Save
Blown Head Gasket
$2,200
$200
$2,000+
Warped Cylinder Head
$1,800
$200
$1,600+
Seized Engine
$8,500
$200
$8,300+
Roadside Breakdown
$300+ tow
$200
$100+
Type 2 (Module + Tank)
Up to $12,000
$270
$11,730+
Order Now
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Product photos coming soon
Coolant Guardian
✓ In Stock — Ships Within 5–7 Business Days
The Coolant Guardian is a universal low-coolant alarm module that monitors your engine coolant reservoir 24/7 and triggers a loud audible alarm the instant levels drop below safe thresholds. Minor mechanical experience needed — most installations are complete in about 20 minutes.
Type 1 — Module Only
Sensor module + alarm unit. Clips onto your existing coolant reservoir.
$200
Type 2 — Module + Pre-Assembled Tank
Complete kit with new coolant reservoir, sensor pre-installed and wired.
$270
$200.00
Free shipping within the US · 30-day return policy
Secured by Stripe · SSL encrypted · All major cards accepted
What's in the Box
✓Coolant Guardian sensor module
✓Audible alarm unit
✓Mounting hardware & clips
✓Wiring harness
✓Quick-start instruction card
Specifications
Compatibility
Universal
Power
12V
Alert Type
Audible (85dB+)
Install Time
~20 minutes
Experience Needed
Minor mechanical
Temp Range
-40°F to 280°F
Warranty
1 Year Limited
Installation Guide — Type 1 (Module Only)
1Let your engine cool completely before beginning installation.
2Locate your coolant reservoir — typically a translucent plastic tank near the engine bay firewall.
3Clip the Coolant Guardian sensor to the exterior of the reservoir at the minimum level line.
4Run the wiring harness to the alarm unit and mount the alarm in a visible/audible location.
5Connect the two-wire power tap to a switched 12V source.
6Test by temporarily lowering the sensor clip — the alarm should sound within 3 seconds.
7Restore sensor to correct position. Installation complete — approximately 20 minutes total.
Installation Guide — Type 2 (Module + Pre-Assembled Tank)
1Drain and remove your existing coolant reservoir.
2Unbox the pre-assembled Coolant Guardian tank. Your vehicle-specific fittings are pre-attached.
3Mount the new reservoir in the factory location using the included hardware.
4Reconnect coolant hoses and bleed the cooling system.
5Run the alarm wiring harness and connect to a switched 12V source.
6Fill with fresh coolant to the max line, check for leaks, and run the engine to operating temp.
7Test the alarm function and enjoy worry-free driving.
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Video Installation Guide — Coming Soon
Does it work on my car?▼
The Coolant Guardian is designed to be universal — if your vehicle has an externally accessible coolant reservoir (virtually all modern cars and trucks do), it will work.
How loud is the alarm?▼
The alarm unit outputs 85dB+ — clearly audible over road noise, music, and HVAC.
How hard is it to install?▼
Type 1 requires minor mechanical experience and basic tools — most complete it in about 20 minutes.
Will it give false alarms?▼
The sensor is calibrated to detect genuine low coolant conditions, not sloshing. The alarm triggers only when fluid is persistently below the minimum threshold.
What is your return policy?▼
We offer a 30-day no-questions-asked return policy. Contact us and we'll arrange a full refund.
Is there a warranty?▼
Yes — every unit comes with a 1-year limited warranty covering manufacturing defects and sensor failure under normal operating conditions.
Progress Roadmap
Where We're Going
Every purchase and donation pushes Coolant Guardian further. See what milestones unlock as we grow.
$0 raised
toward $10,000 Phase 1 Goal
0 units sold
+ donations
$0$2,500$5,000$7,500$10,000
Development Levels
Unlock the Future
01
Launch
Initial production run of the Coolant Guardian Module. Handcrafted, tested, and shipped to early adopters.
Goal: $0 — Reached at Launch
✓ Reached
02
Scale Production
Fund a proper production run with component sourcing and quality control. Reduces per-unit cost and shipping times.
Goal: $2,500 (~12 units or donations)
⚡ In Progress
03
App Integration
Develop a companion mobile app with Bluetooth — receive phone notifications and log coolant history.
Goal: $5,000 (~25 units)
🔒 Locked
04
Temperature Monitoring
Add real-time coolant temperature sensing alongside level monitoring.
Goal: $7,500 (~35 units)
🔒 Locked
05
OBD-II & Retail
Integrate with OBD-II for plug-and-play setup and expand into retail stores nationwide.
Goal: $10,000 (~50 units)
🔒 Locked
06
Fleet & Commercial
Purpose-built fleet version for trucking companies with bulk pricing and centralized dashboard.
Goal: $20,000+ (community milestone)
🔒 Locked
Legal
Terms of Service & Liability Waiver
Last Updated: January 1, 2026
IMPORTANT — PLEASE READ CAREFULLY:By purchasing, installing, or using the Coolant Guardian product, you acknowledge that you have read, understood, and agree to be bound by these Terms of Service and Liability Waiver. If you do not agree to these terms, do not purchase or use this product.
1. Product Description and Purpose
The Coolant Guardian is an aftermarket supplemental alert device designed to provide an audible warning when coolant levels drop below a set threshold. It is intended as a supplemental warning system only and does not replace any factory-installed vehicle monitoring system.
2. Limitation of Liability — CRITICAL
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, COOLANT GUARDIAN AND ITS OWNERS SHALL NOT BE LIABLE FOR:
Any engine damage, failure, or destruction resulting from coolant loss, regardless of whether the Coolant Guardian device was installed or functioning.
Any vehicle breakdown, roadside emergency, towing costs, or related expenses.
Any personal injury, death, or property damage arising from use of the product, product failure, or failure to heed the alarm.
Any indirect, incidental, special, consequential, or punitive damages of any kind.
Device failure due to improper installation, tampering, extreme conditions, or physical damage.
Loss of vehicle use, diminished vehicle value, or any financial loss of any kind.
Our maximum liability shall not exceed the purchase price you paid for the product.
3. No Warranty of Uninterrupted Operation
The Coolant Guardian is designed to function under normal operating conditions. We do not guarantee the device will detect every low-coolant event or function without interruption. THE DEVICE IS SUPPLEMENTAL. ALWAYS PERFORM REGULAR VEHICLE MAINTENANCE AND MANUALLY CHECK YOUR COOLANT LEVEL ROUTINELY.
4. Installation Responsibility
You assume full responsibility for proper installation following the provided instructions. Coolant Guardian is not responsible for damage resulting from improper installation or modification of the device. If you are unsure, consult a qualified automotive technician.
5. Assumption of Risk
By purchasing and using the Coolant Guardian, you expressly acknowledge and assume all risks associated with vehicle maintenance and cooling system care, and the possibility that the device may not alert in every low-coolant scenario.
6. Governing Law
These terms shall be governed by and construed in accordance with the laws of the State of California, without regard to its conflict of law provisions. Any disputes shall be resolved through binding arbitration.
7. Contact
For questions regarding these terms, please contact us through our website. By completing a purchase, you confirm you have read and agree to these terms in their entirety.
