BMW i3 94Ah Battery Replacement Guide: Restore Range & Performance in 2024
Is Your BMW i3’s 94Ah Battery Draining Faster Than Expected?
The BMW i3’s 94Ah battery (33kWh) was revolutionary when it launched—offering up to 114 miles of range on a single charge. But after 5–7 years of use, even the best lithium-ion cells degrade. Are you experiencing:
- 🔋 Range dropping below 70 miles on full charge?
- ⚡ Slower charging times (taking hours instead of minutes)?
- 💸 High replacement quotes from dealers (up to $12,000 for OEM)?
You’re not alone. Thousands of i3 owners face the same dilemma. But replacing your battery doesn’t have to be expensive or complicated.
This guide walks you through every step of replacing your BMW i3’s 94Ah battery—including how to save 50%+ with CNS BATTERY’s premium alternatives.
Why Replace Your BMW i3 94Ah Battery Now?
1. Degraded Cells = Poor Performance
Lithium-ion batteries lose capacity over time due to:
- Cycling stress (regular charging/discharging)
- High temperatures (parking in direct sunlight)
- Age-related wear (even if rarely used)
Real-world example: A 2017 i3 owner in Texas saw his range drop from 105 miles to 62 miles after 6 years. After upgrading to a CNS 62kWh battery, he now drives 210 miles per charge.
2. OEM Batteries Are Overpriced & Outdated
BMW’s official replacement battery costs 10,000–12,000—and it’s the same 94Ah design as your 2016 model. Why pay more for outdated tech?
CNS BATTERY’s solution:
- 62kWh capacity (double the original)
- Modern CATL cells (20% more efficient)
- 50% lower cost (5,900–7,800)
3. Seamless Installation for DIY & Pros
Worried about compatibility? Our batteries:
- Fit all 2014–2021 i3 models (including 94Ah & 120Ah variants)
- Plug-and-play (no dealer programming needed)
- Come with step-by-step video guides
Step-by-Step BMW i3 94Ah Battery Replacement Guide
Step 1: Assess Your Battery’s Health
Before replacing, check:
- Current range (full charge vs. manufacturer’s claim)
- State of Health (SoH) via diagnostic tools like BMW i Remote or BimmerCode
- Physical damage (swelling, leaks, or corrosion)
Pro tip: If your battery holds <70% capacity, replacement is cost-effective.
Step 2: Choose the Right Replacement
| Option | CNS BATTERY 62kWh | OEM 94Ah | Refurbished |
|---|---|---|---|
| Capacity | 62kWh | 33kWh | 30–33kWh |
| Price | 5,900–7,800 | $12,000 | 4,500–6,000 |
| Warranty | 24 months | 12 months | 6 months |
| Cell Quality | Brand-new CATL | OEM | Used |
Best choice? CNS BATTERY’s 62kWh upgrade—twice the range, half the cost of OEM.
Step 3: Install Your New Battery
Option 1: DIY Installation (2–3 hours)
- Disconnect the 12V battery (under the hood)
- Remove the rear seat & trim (access panel below)
- Unplug the old battery (disconnect HV cables safely)
- Install the new battery (align connectors & secure bolts)
- Reassemble & test (check for error codes)
Watch our https://cnsbattery.com/ev-battery-home/bmw-ev-batteries/bmw-i3-series-battery/ for details.
Option 2: Professional Installation (200–400)
Find a certified EV mechanic via our https://cnsbattery.com/ev-battery-home/ev-battery-contact/.
Step 4: Program & Calibrate
After installation:
- Reset the BMS (Battery Management System) via ISTA+ or ESYS
- Perform a full charge cycle (0% to 100%)
- Drive gently for 50 miles (let the BMS learn your driving style)
Why Choose CNS BATTERY Over OEM or Refurbished?
✔️ Superior Performance
- 62kWh capacity (vs. OEM’s 33kWh)
- 20% faster charging (0–80% in 30 mins with DC fast charging)
- Longer lifespan (8–10 years vs. OEM’s 5–7 years)
✔️ Cost Savings That Add Up
| Expense | OEM Battery | CNS BATTERY | Refurbished |
|---|---|---|---|
| Upfront Cost | $12,000 | $7,800 | $5,500 |
| Warranty | 12 months | 24 months | 6 months |
| Total Cost | $12,000 | $7,800 | $7,000+ |
Refurbished batteries often fail within 2 years, costing more in replacements.
✔️ Peace of Mind Guaranteed
- 24-month/80,000km warranty (industry-leading)
- Free installation support (live chat + video tutorials)
- 100% refund policy (if not compatible)
FAQ: BMW i3 94Ah Battery Replacement
Q: Will a new battery improve my i3’s performance?
A: Yes! A higher-capacity battery (e.g., 62kWh) increases range by up to 200% and reduces charging times.
Q: Is DIY installation safe?
A: Yes, if you follow our video guide and wear insulated gloves. Disconnect the 12V battery first to avoid shocks.
Q: How long does a CNS BATTERY last?
A: 8–10 years with proper care (avoid extreme temperatures, charge to 80% daily).
Q: Do I need to reprogram my car after replacement?
A: No—our batteries are plug-and-play. But resetting the BMS ensures optimal performance.
Ready to Upgrade Your BMW i3’s Battery?
- https://cnsbattery.com/ev-battery-home/bmw-ev-batteries/bmw-i3-series-battery/ (enter your VIN or model year).
- Get a free quote (instant pricing, no hidden fees).
- Order online (secure checkout, global shipping).
Don’t let an old battery limit your i3’s potential. With CNS BATTERY, you’ll drive farther, charge faster, and save thousands compared to OEM.
👉 https://cnsbattery.com/ev-battery-home/ev-battery-contact/
Drive smarter. Drive longer. Choose CNS. 🚗💨