Car Maintenance and Safety Tools
Keep track of service intervals and safety checks. The tools use your handbook figures and the Highway Code and MOT rules, and say clearly when a number is a typical range.
Tools in this group
Brake Fluid Replacement Interval Checker
Enter the months since the last brake fluid change, the fluid grade and your handbook interval: see if the change is due and a rough boiling-point estimate.
Open →Cambelt Replacement Interval Calculator
Enter your engine's cambelt interval from the handbook and the miles and years since the last change: see the miles and time left, or how far it is overdue.
Open →Car Battery Lifespan Calculator
Enter the battery age, type and your driving: see the typical life range and where your battery sits in it.
Open →Engine Oil Change Interval Checker
Enter your handbook oil service interval and the miles and months since the last change: see what is left or how far it is overdue.
Open →Speedometer Accuracy Calculator
Type your speedometer reading: see the true-speed range the approval rule allows, the police guidance threshold for the limit, and the effect of a tyre size change.
Open →Stopping Distance Calculator (UK Highway Code Rules)
Thinking plus braking distance at any speed, following the Highway Code table (30 mph = 23 m, 70 mph = 96 m), with the wet and icy multipliers.
Open →Towing Capacity Weight Calculator & 85% Rule Tool
Calculate caravan weight matches and GTW limits with our towing capacity weight calculator. Check the 85% rule, MTPLM ratios, and safety ratings.
Open →Tyre Tread Depth Checker & 20p Coin Test Guide
Type the tread depth you measured and see how it compares with the UK 1.6 mm legal minimum and the 3 mm replacement advice.
Open →Wheel Alignment Camber Toe Checker
Pick the tyre wear pattern and the steering symptom: see whether it points to toe, camber, pressures or balance, and what to check first.
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