The single most important step. Ask the seller for the BPAN code from the battery pack. (If they do not know what BPAN is, find the 21-character code on the battery label yourself. See our guide on how to find the BPAN if you cannot locate it.)

Once you have the BPAN, decode it using our free BPAN decoder. The decoder will tell you the battery manufacturing date, chemistry (NMC or LFP), capacity, voltage, and cell origin country. Compare the battery manufacturing date to what the seller claims. If the seller says the vehicle is 2 years old but the battery is 4 years old, the battery has been replaced (or the seller is lying about the vehicle age). Either way, that is a red flag.

If the BPAN shows the battery is NMC chemistry and you live in a hot climate (North India, Maharashtra, Telangana, Tamil Nadu summers), factor that into your purchase decision. NMC batteries are more heat-sensitive. LFP is preferable for Indian conditions.

Call the manufacturer's customer care with the VIN and BPAN. Ask two questions: (1) Is the battery still under warranty? (2) Is the warranty transferable to a new owner?

Most Indian EV manufacturers (Tata, Ather, TVS, MG) allow warranty transfer. Ola Electric's warranty transfer policy has been inconsistent in owner reports. Get the answer in writing (email) before you pay. If the warranty is not transferable, negotiate the price down by the cost of a potential out-of-warranty battery replacement (use our Replacement Cost Calculator).

Use our free Used EV Health Estimator. Answer the 10 questions based on what you observe during the inspection and what the seller tells you. The tool will estimate the battery's SOH as a percentage.

Anything above 85% is excellent. 70 to 85% is acceptable. Below 70% means the battery is significantly degraded and you should negotiate a substantial price reduction (or walk away).

If possible, ask the seller to take the vehicle to an authorized service center for a battery health check. Most manufacturers will provide a printed SOH report for a small fee (Rs 500 to 1,500). This is the most accurate way to verify battery health. If the seller refuses, that itself is a red flag.

The dashboard shows "certified range" or "ARAI range". This number is almost always inflated by 15 to 25%. Real-world range is typically 75 to 85% of the ARAI figure. For a Tata Nexon EV with 312 km ARAI range, expect 230 to 265 km in real-world city driving.

Before buying, ask to test ride the vehicle for at least 10 kilometers. Note the state of charge at the start and end of the ride. Calculate the actual range. If the seller claims 300 km range but the test ride shows the battery dropping 10% in 5 kilometers (implying 50 km total range), something is wrong. Either the battery is severely degraded, or the seller has tampered with the dashboard display.

Inspect the charging port physically. Look for burn marks, melted plastic, or corrosion. These indicate past overheating or water ingress. Plug in the charger and confirm the vehicle starts charging. Note the charging speed. If a 3.3 kW charger is taking 8 hours to charge a 3 kWh battery (should take 1 hour), the onboard charger is faulty.

Ask for the complete service history. The seller should have invoices from authorized service centers showing all scheduled services. Check that the vehicle has received all software updates. You can verify this by checking the software version in the vehicle's settings menu and comparing it to the latest version on the manufacturer's website.

If the vehicle has been serviced at a non-authorized garage, that is a red flag. Non-authorized garages may not have the diagnostic tools to properly service an EV, and any modifications they made could void the warranty.

Look under the vehicle. The battery pack is usually a large metal box mounted under the floor. Check for dents, scratches, or oil leaks (EVs do not have engine oil, but they have coolant and brake fluid). Any dent on the battery pack is a serious concern. Even a small dent can compromise the pack's structural integrity and lead to cell damage.

Also check the chassis for signs of repair. Mismatched paint colors, welded joints that look newer than the surrounding metal, or panels that do not align properly all suggest accident damage. Get a professional mechanic to inspect if you have any doubts.

Ask the seller for the insurance policy number. Call the insurer and ask about the claim history. Specifically: have any claims been filed for battery damage, fire, or water ingress? If yes, the vehicle has had a serious incident in the past, and you should be very cautious. Even if the claim was settled and the vehicle repaired, the long-term reliability may be compromised.

If you can borrow or buy an OBD-II scanner with EV support (around Rs 3,000 to 8,000 on Amazon), plug it in during the test ride. The scanner will show you real-time battery data: cell voltages, pack temperature, BMS diagnostics. Look for cell voltage imbalance. If one cell is at 3.95V while others are at 4.10V, that cell is failing.

Once you have completed Steps 1 to 9, you should know the battery's actual SOH. Use this to negotiate. A new EV battery costs 30 to 45% of the vehicle's value. A used EV with 75% SOH battery has lost 25% of its battery life. If the vehicle is 5 years old with 75% SOH, expect the battery to fail or drop below 70% SOH within 1 to 2 years. At that point, you face a Rs 70,000 (scooter) to Rs 7 lakh (car) replacement bill.

Negotiate the price down by at least 50% of the expected replacement cost. For example, if you are buying a used Ola S1 Pro Gen 1 (3 years old, 75% SOH) for Rs 80,000 and the expected replacement cost is Rs 70,000, negotiate the price down to Rs 45,000 to 50,000. Most sellers will not agree to this. Walk away. There will be other used EVs.

Standard vehicle purchase checks apply. Verify the Registration Certificate (RC) is in the seller's name. Check that road tax has been paid (some states require annual road tax for EVs, others have one-time payment). Check for any pending loan or hypothecation on the vehicle. Use the Parivahan website to verify all documents online before you pay.

On the day of purchase, before you hand over the money, decode the BPAN one final time. Verify the code matches what you decoded in Step 1. Take a photo of the BPAN label and the decode results. Keep this with your purchase documents. If you ever need to make a warranty claim, this is your proof of the battery's age and condition at the time of purchase.