Battery & Electrical System Service in Hayward, CA
Battery testing, replacement, and electrical system repair in Hayward, CA. Alternators, starters, parasitic drains, and module diagnosis. ASE-certified. 15% off battery replacement.
A weak or dead battery is the #1 cause of no-starts, but it's rarely the only thing going on. At S&R Motors in Hayward, our ASE-certified technicians test the full charging system — battery, alternator, starter, ground connections, and parasitic draws — before recommending a replacement. We carry premium batteries, install for free, and our current special saves you 15%.
We test, service, and replace batteries, alternators, and starters. We diagnose parasitic drains that kill your battery overnight, repair corroded battery cables and ground straps, replace fusible links and bad fuses, troubleshoot lighting and dashboard warning lights, and fix electrical accessories that have stopped working. We carry premium AGM, EFB, and standard flooded batteries from Bosch, Interstate, and OEM brands sized for your vehicle and trim. Modern vehicles often need a battery registration after replacement so the charging system tracks correctly — we handle it.
Batteries lose capacity gradually. By the time the car won't start, the alternator has often been working harder than designed, which shortens its life too. Modern vehicles also have electronic modules that pull tiny currents at all times, and any one of them sticking awake can drain a battery overnight. Diagnosing the actual cause — battery, alternator, ground, or drain — saves you from paying for a new battery only to be stranded again.
Cold mornings, hot afternoons, and short stop-and-go trips around Hayward, San Lorenzo, Union City, Castro Valley, and San Leandro all stress batteries. We test charging systems for free, install batteries the same day, and back our work with a warranty. 15% off battery replacement is our current Hayward special.
Why Choose S&R Motors for Battery & Electrical in Hayward
- ASE-certified technicians
- Free battery and charging system test
- Premium batteries from Bosch, Interstate, and OEM
- Alternator and starter diagnosis and replacement
- Parasitic drain testing
- Battery registration and module reset
- 15% off battery special
- Same-day installation
Battery & Electrical FAQ
Where can I get my battery tested in Hayward?
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Service Details
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Our Hours
Certifications
12-month / 12,000-mile parts warranty
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Factory scheduled maintenance in Hayward, CA. 30k, 60k, 90k, and 120k mile services performed to manufacturer specifications using OEM-spec parts and fluids. Dealer-alternative pricing.
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Oil change and maintenance in Hayward, CA. Synthetic, conventional, blend, and high-mileage oils. Multipoint inspection, battery test, and free tire and alignment check on every visit. Walk-ins welcome.
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Auto A/C and heating repair in Hayward, CA. Refrigerant recharge (R-134a and R-1234yf), leak detection, compressor and evaporator service, heater core, and cabin air. $50 off A/C repair.
Battery & Electrical serving: Hayward, Fremont, Union City, Newark, San Leandro, Castro Valley, San Lorenzo, Oakland, and the greater Bay Area.