# Coil Spring Replacement in Upland > Sagging corner or a bang over dips? Route 66 Auto Repair in Upland measures ride height, replaces broken or tired coil springs in pairs, and road-tests. Source: https://route66autorepairshop.com/suspension-and-steering-services/coil-spring-replacement Updated: 2026-09-17 Business: Route 66 Auto Repair, 1775 W Foothill Blvd, Upland, CA 91786, (909) 608-7699 Hours: Monday to Friday 8 AM–5 PM, Saturday 8 AM–2 PM, Sunday closed **TLDR:** Springs **hold the weight**. We **measure ride height**, replace springs **in pairs**, and check the strut beneath before closing the job. Coil springs hold your car's weight and set how high it sits. When one breaks or sags, Route 66 Auto Repair in Upland measures ride height at each corner, confirms the spring is the cause, and replaces the springs in axle pairs after you approve a written estimate. A broken spring can puncture a tire or let the car bottom out, so it goes to the top of the list. Springs often ride on a strut, so we look at the [strut repair](https://route66autorepairshop.com/suspension-and-steering-services/strut-repair) question at the same time. ## What are the signs of a broken or weak coil spring? - One corner sits visibly lower than the others - A metallic bang when you back out of the driveway or turn sharply - Bottoming out over dips that never bothered the car before - A broken coil end visible in the wheel well - Headlights aimed oddly because the car sits unevenly ## Why do coil springs break or sag? Springs are steel under constant stress. Road salt is rare here, but chipped coating lets rust start, and the bottom coil usually breaks where it sits in the seat. Heavy loads, towing and years of speed humps add fatigue, and the spring slowly loses height. We measure ride height from fixed points on the body and compare side to side and to specification. That tells us whether a spring is tired or whether something else, like a failed strut or mount, is causing the lean. ## Our coil spring replacement process 1. **Measure:** Ride height is measured at each corner and compared to spec. 2. **Inspect:** We look for breaks, rust pits and seat damage, and check the struts and mounts. 3. **Quote:** The written estimate shows springs in pairs and whether struts should be done at the same time. 4. **Replace safely:** Springs are compressed with proper tools, installed in their seats, and hardware is torqued to spec. 5. **Verify:** Ride height is rechecked, and we arrange an alignment if the repair changed the angles. ## What's included in coil spring replacement - Ride height measurement before and after - Spring seat and isolator inspection - Strut and mount condition check - Springs replaced as a matched pair on the axle - Alignment arranged when needed - Road test ## Need-now or need-later? **Need now:** - A broken coil, especially near the tire - A corner low enough to bottom out **Need later:** - Slight, even sag across both sides - Surface rust on intact springs ## How pricing and timing work On strut-type suspensions, springs come off with the strut, so many owners choose a complete assembly. The estimate shows both options. AAA members get 10% off parts and labor, up to $75. Rear springs on some designs are quick; front strut-mounted springs take longer and may need an alignment. We give you a realistic window when the board allows. ## Aftercare New springs can settle slightly in the first few hundred miles. If you tow or haul, tell us so we can note the load for next time. A [suspension inspection](https://route66autorepairshop.com/diagnostics-and-inspections/suspension-inspection) will catch sag before it breaks. For work trucks, see our [truck and fleet audience page](https://route66autorepairshop.com/audiences-and-use-cases). ## Frequently asked questions ### Can I drive with a broken coil spring? It is risky. The broken end can cut a tire, and the car may handle unpredictably. Drive slowly and briefly, or arrange a tow-in. ### Why replace springs in pairs? A new spring sits higher than an old one, so replacing only one leaves the car uneven. Pairs keep ride height and handling balanced. ### Are coil springs different from leaf springs? Yes. Leaf springs are stacked steel plates, common on pickup rear axles. We work on both, and the inspection covers whichever your vehicle uses. --- Call (909) 608-7699 or visit https://route66autorepairshop.com/contact for a written estimate.