⚡ 15–25 Min Sacramento ETA 🚗 Passenger & Light Truck (12V) 1984–2026 • From $69

BMW i4 M50 Jump Start Service Sacramento — Battery, Starter & Boost Specs

24/7 mobile jump start for your BMW i4 M50 (1984–2026) in Sacramento using Surge-Protected 2,500A Peak 12V Pro Booster Pack.

Model & Years

BMW i4 M50 (1984–2026)

Voltage System

12V AGM / 16V Li-Ion Aux Contactor System

OEM Battery Group

Group 51R / Group 47 (H5) / 12V Aux or 16V Li-Ion

Cranking Amps

410–680 CCA / Low-Voltage Contactor Supply

Alternator Spec

HV-to-LV DC-DC Converter (14.4V / 15.5V)

Starter Motor

HV Main Contactor & Motor-Generator

BMW i4 M50 Jump Post Location & Safe Protocol

📍 Step 1: Terminal Location

Battery & Remote Jump Posts

Under-hood remote positive (+) post under red flip cap & dedicated hex ground (-) stud on strut tower. Battery is located in the trunk floor (right rear or center well) with an IBS (Intelligent Battery Sensor) and positive Safety Battery Terminal (SBT pyrotechnic disconnect).

⚠️ Step 2: ECU & Fuse Safety

IBS & Fusible Link Protection

Never clamp directly to the trunk battery on BMW E90/F30/G20/E70/F15/G05 models—bypassing the Intelligent Battery Sensor (IBS) can corrupt the DME/BDC/FRM module or blow the rear power distribution box fusible link. Low voltage (<10.2V) frequently triggers Transmission Malfunction warnings and steering lock errors that clear once properly boosted via the under-hood posts.

⚡ Step 3: Charging Check

Alternator Voltage Test

Post-boost verification of HV-to-LV DC-DC Converter (14.4V / 15.5V) output (13.8V–14.8V on 12V; 27.6V–28.4V on 24V commercial).

BMW i4 M50 Year-by-Year Specifications

Generation	Battery Group	CCA	Alternator	Starter	System Notes
i4 M50 (2021–2026)	Group 51R / Group 47 (H5) / 12V Aux or 16V Li-Ion	410–680 CCA / Low-Voltage Contactor Supply	HV-to-LV DC-DC Converter (14.4V / 15.5V) (14.2V–14.8V)	HV Main Contactor & Motor-Generator	Smart LIN/BSD Regulated AGM / Aux
i4 M50 (2015–2020)	Group 51R / Group 47 (H5) / 12V Aux or 16V Li-Ion	410–680 CCA / Low-Voltage Contactor Supply	HV-to-LV DC-DC Converter (14.4V / 15.5V) (14.0V–14.6V)	HV Main Contactor & Motor-Generator	High-Reserve AGM / EFB Start-Stop
i4 M50 (2008–2014)	Group 51R / Group 47 (H5) / 12V Aux or 16V Li-Ion	410–680 CCA / Low-Voltage Contactor Supply	HV-to-LV DC-DC Converter (14.4V / 15.5V) (13.8V–14.4V)	HV Main Contactor & Motor-Generator	High-CCA AGM / Lead-Acid
i4 M50 (1998–2007)	Group 51R / Group 47 (H5) / 12V Aux or 16V Li-Ion	410–680 CCA / Low-Voltage Contactor Supply	HV-to-LV DC-DC Converter (14.4V / 15.5V) (13.8V–14.2V)	HV Main Contactor & Motor-Generator	OEM Group Lead-Acid / AGM
i4 M50 (1980–1997)	Group 51R / Group 47 (H5) / 12V Aux or 16V Li-Ion	410–680 CCA / Low-Voltage Contactor Supply	HV-to-LV DC-DC Converter (14.4V / 15.5V) (13.6V–14.2V)	HV Main Contactor & Motor-Generator	Standard BCI High-CCA