EV 12V Battery Not Charging
EV 12V battery not charging is usually a DC-DC converter or ICCU fault, not a simple swap. Here is what causes it, what to check, and when it becomes urgent.
Automotive knowledge hub
Updated daily
Real answers for every driver
Symptoms, specs, maintenance guides and calculators — everything you need to understand and care for your car.
37+
In-depth guides
48
Car makes
5
Expert authors
Next service2,400 km away
P0300 decodedMisfire fix guide
32.5 psi — all fourTire pressure OK
🔧
Expert-writtenBy mechanics & owners
📐
Spec-accurateModel-specific data
⚡
Fast answersNo fluff, no filler
🔄
Always updatedCurrent model years
Four content pillars
What are you looking for?
Every guide on this site falls into one of four structured categories. Pick one.
01 — Symptoms
Symptoms
Noises, lights, vibrations and leaks decoded in plain English.
Browse symptoms →02 — Maintenance
Maintenance
Oil, brakes, batteries — clean, practical guides.
Browse maintenance →03 — Specs
Specs
Pressure, capacity, torque — by make and model.
Browse specs →04 — Calculators
Calculators
Annual cost, road trip risk, and more interactive tools.
Open calculators →
Symptoms
View all
Latest symptom guides
Rough idle when cold
A rough idle that smooths out after warm-up is usually a stuck IAC valve, dirty MAF, or worn spark plugs. Here’s how to tell which without a scanner.
Coolant Loss No Visible Leak
Coolant disappearing with no puddle under the car means a head gasket, intake manifold leak, or cracked reservoir. Here’s how to narrow it down fast.
Maintenance
View all
Maintenance guides
How to Patch a Tire
A tread puncture up to 6mm wide can be permanently fixed with a mushroom plug-patch from inside the tire. Here is the full process, what cannot be repaired, and what it costs.
How to Remove Window Tint
Bubbled or purple tint needs to come off before it gets worse. Heat gun, plastic scraper, adhesive remover. The film is not the hard part. Here is the full procedure.
How to Change a Tire
Changing a flat tire takes 15 minutes if you know the sequence. The step most guides bury: loosen the lug nuts before jacking, not after. Here’s the full procedure.
Specs
View all
Quick-reference specs
Wheel Stud and Wheel Bolt Size: Thread, Pitch, and Seat Type
Wheel stud thread specs by manufacturer: M12x1.25, M12x1.5, M14x1.5, and half-inch-20 UNF. Covers Ford, GM, Toyota, Subaru, BMW, Mercedes, and how to verify your vehicle spec before ordering.
Bosch ADAS Hardware in Production Cars: Radar Range, Camera Specs, and System Capabilities
Bosch ADAS sensor specs: LRR4 radar range, SVC2 camera coverage, iBooster brake response, sensor locations, common faults, and production-car use.
Automatic Emergency Braking: AEB Speed Limits, Sensors and Model Differences
AEB specs by model: activation speed thresholds, sensor types, pedestrian detection ceilings, and IIHS ratings for Toyota, Honda, Subaru, Ford, Hyundai, Volvo, Mercedes, Tesla, and GM.
Interactive tools
All calculators
Free car calculators
💰
Free · 2 min
Annual Car Cost Calculator
Find out exactly what your car costs to own per year — insurance, fuel, maintenance, repairs, and depreciation all in one number.
Open calculator →
🗺️
Free · 3 min
Road Trip Risk Calculator
Estimate how ready your car is for a longer drive. We check six key systems and tell you exactly what to look at before you leave.
Open calculator →
🎯
Free · 3 min
Which Car Suits You?
Answer 7 honest questions and we'll match you to your best car from 50+ models — with real explanations, not just a spec sheet.
Open calculator →
🔑
Free · 3 min
What Car Can I Afford?
Set your monthly budget and see every car that fits — loan, insurance, fuel, and maintenance combined into one honest number. 280+ models.
Open calculator →
💲
Free · 2 min
What's My Car Worth?
Get a realistic trade-in, private sale, and dealer retail estimate based on your vehicle age, mileage, condition, and history.
Open calculator →