License #232420 · California state licensing records · data refresh 2026-08-03
About this brake and lamp inspection station
Four Corners Union operates out of 2025 Monument Blvd in Concord, California. California state licensing records (refreshed 2026-08-03) list it under license #232420.
State records list its specialty as Vehicle Safety Systems Inspection — self-reported by the shop. Phone: (925) 682-3142. A quick call first is the fastest way to confirm hours and today's wait.
Four Corners Union is at 2025 Monument Blvd, Concord, CA 94520. Phone: (925) 682-3142.
What license does Four Corners Union hold?
Four Corners Union appears in California state licensing records under license #232420 (data refresh 2026-08-03).
What does a brake service include?
A complete brake service includes inspection of pads, rotors, calipers, brake lines, and fluid — followed by replacement of whatever is worn beyond safe limits, with a road test to confirm.
Brake fluid absorbs moisture over time and lowers the boiling point — flush recommended every 2-3 years
Rotors can often be machined instead of replaced if within spec
Caliper slide pins must be lubricated to prevent uneven pad wear
Some pads include a lifetime pad warranty — ask about coverage
Road test after service is non-negotiable for confirming safe stopping
Per ASE A5 brake system standards.
How long do brake pads last?
Brake pads typically last 30,000-70,000 miles — driving style and terrain are the biggest variables.
City stop-and-go driving wears pads 2-3x faster than highway
Heavier vehicles put more load on brake components
Quality of pad compound affects longevity significantly
Front pads wear faster than rear on most vehicles
California hills and canyon driving accelerate wear
Per ASE technician guidelines and brake manufacturer data.