If you own an MG ZS — petrol or EV — and you want to read fault codes, check your battery's health, or run a diagnostic, you first need to find the OBD port. On the MG ZS it's tucked in the driver's side footwell, and many owners struggle to spot it behind the trim. This guide shows you exactly where the MG ZS OBD port is, how to access it safely, which scanners actually work, and how to read those SAIC/MG fault codes you may have searched for.
Where Is the MG ZS OBD Port? (Location Guide)
The MG ZS OBD port sits in the driver's side footwell. Look above the pedals and to the right of the steering column.
Often it hides behind a small plastic cover that keeps the dashboard looking clean. UK owners on the SpeakEV and MGEVs forums describe it as a large "D-shaped" plug, close to the front edge of the footwell near the bonnet release.
The location is the same on right-hand-drive cars across the UK, Australia and New Zealand. On left-hand-drive models (such as those in the Netherlands), the equivalent module sits under the steering wheel on the opposite side.
Step-by-Step: Finding the Port
- Prepare your space. Turn the car off completely and park somewhere safe and well-lit. A torch helps — the area under the dash stays dark.
- Get into position. Crouch by the driver's door so you can see under the dashboard, above the brake and accelerator pedals.
- Find the trim. Focus on the plastic trim directly under the steering column.
- Remove the cover. Look for a small rectangular cover — it may say "OBD" or show a diagnostic symbol. Unclip it with your fingers and pull it down or out to reveal the D-shaped port underneath.
The OBD port location stays the same across all MG ZS models. Both older and newer versions put it in the same spot, which makes it easy for any owner to find their car's data connection.
Does the MG ZS EV Have an OBD2 Port?
Yes. Electric cars must have an OBD-II style port — it's a standard connection for diagnostic tools, and the MG ZS EV is no exception. This is a common worry for buyers, but rest assured the port is there.
The difference is in the data. Instead of tracking emissions and engine health like a petrol car, an EV OBD port watches the high-voltage battery, electric motor, and charging systems.
Key Data You Can Read on an EV
Getting this data opens up new possibilities for owners. You can track things a regular car simply can't show you:
- Battery State of Health (SOH): the real, long-term health of your battery — not just its current charge level.
- Individual cell voltages: check each battery cell's voltage to spot failing cells early.
- Charging history: see how often the car used DC rapid charging versus AC slow charging, which matters for battery life.
- High-voltage system status: watch the real-time condition and temperature of key parts like the battery pack and inverter.
What You Can Do With the OBD Port
Once you have access, what can you actually do? The port opens doors to insights that can save money and give you peace of mind.
Check Battery Health Before Buying Used
Every EV owner worries about battery wear, and that fear hits hardest when buying a used electric car. On the SpeakEV forum, one buyer shared exactly this concern — they wanted a 3-year-old MG ZS EV, but the seller's claim of a "perfect" battery couldn't be verified during a test drive.
An EV OBD scanner solves this. Paired with the right app, it reads the Battery State of Health (SOH) and gives you a clear percentage of current capacity versus new. An SOH of 95% means the battery has lost 5% of its original capacity.
For a deeper check, look at cell voltage differences. A gap of more than 0.05V between the highest and lowest cell can warn of pack problems, even when the overall SOH looks healthy.
Read MG/SAIC Fault Codes (DTCs)
Many small EV faults never trigger a dashboard warning light. These "silent" faults get stored as Diagnostic Trouble Codes (DTCs) in the Battery Management System (BMS) or other control units.
If you've searched a specific SAIC/MG code — for example U016987, B106673 or C120700 — the prefix tells you which system it belongs to. Knowing the family helps you judge how urgent it is:
| Code prefix | System | Typical meaning |
|---|---|---|
| U (e.g. U0169) | Network / communication | A module isn't talking properly on the CAN bus — often wiring or a dropped connection |
| B (e.g. B1066) | Body | Body electronics — airbags, lighting, comfort systems |
| C (e.g. C1207) | Chassis | Chassis systems — ABS, stability control, sensors |
| P | Powertrain | Motor, battery or (on petrol cars) engine and emissions |
A scanner reads these codes so you can find and fix small issues — a sensor fault, a communication error — before they turn into big headaches. Note that manufacturer-specific codes (the full SAIC definitions) often need an MG-aware app or tool to translate fully, rather than a generic reader.
Monitor Real-Time Performance
Data-loving drivers will find the OBD port full of live information. You can watch exact power draw (in kW) from the battery during acceleration, and see how much comes back through regenerative braking.
This feedback helps you refine your driving style, predict energy use, and squeeze the most range from your car.
Can You Unlock Hidden Features?
New owners ask this a lot. Some brands like Volkswagen or Tesla have communities that code and unlock hidden features through the diagnostic port. The MG ZS works differently.
For now, the MG ZS OBD port mainly handles diagnostics and real-time monitoring for everyday users. It's a powerful tool for understanding your car — not for changing factory settings.
Choosing Your Tools: Scanners That Actually Work
You need the right hardware and software to access this data, and picking good kit makes all the difference.
Basic code readers from the high street might not work. You need an OBD2 adapter that supports the CAN protocol used by modern EVs. Bluetooth or Wi-Fi dongles that pair with a smartphone work best for most owners.
Recommended OBD2 Scanners
| Scanner | Type | Key feature | Price range |
|---|---|---|---|
| OBDLink CX | Bluetooth | Fast data rates, reliable connection, low power draw | £80–£100 |
| Vgate iCar Pro | Bluetooth | Broad compatibility; affordable ELM327-based adapter; Android/iOS | £20–£35 |
| AD20PRO (EVparts4x4) | Bluetooth 5.0 | Full-system diagnostics, battery test, live data, lifetime free updates | ~£90 |
The Software That Speaks EV
Hardware is only half the solution — the app translates raw data into something useful. Popular apps that work well with the MG ZS EV include EVNotify, Torque Pro (may need custom PIDs), and Car Scanner ELM OBD2. Each offers a different feature set and layout.
For Deeper EV Diagnostics
If you want to go beyond reading codes — into high-voltage system analysis and OE-level diagnostics — a dedicated EV tool like the D9EV diagnostic tool handles battery packs and advanced ECU functions that a basic dongle can't reach.
Will an OBD Scanner Void My Warranty? (Safety First)
Safety is a fair concern. Is it safe to plug third-party devices into your car, and could it affect your warranty?
The Golden Rule: Read-Only
Quality OBD scanners in "read-only" mode are very safe. They listen to data from the car's computers without sending commands or changing anything. Used this way for thousands of miles, they don't interfere with normal operation.
What About the Warranty?
This matters to a lot of owners. In the UK and EU, consumer law gives you strong protection — a manufacturer generally can't void your whole warranty simply because you used an aftermarket tool. They'd need to prove your specific tool directly caused a specific failure.
As one automotive electronics specialist puts it: as long as you're not trying to write or flash new software to the car's ECUs, the risk is minimal — stick to reputable diagnostic apps and hardware.
There's a real-world lesson here too. A member of the MG ZS EV Owners Club (UK) shared how a cheap, unbranded dongle kept disconnecting and showed wildly wrong readings, causing needless worry about battery health. Switching to a quality, recommended scanner fixed it completely — a good reminder that reliable tools are worth it from the start.
What About the MG HS and MG4?
The MG ZS isn't the only MG owners are searching for. If you drive an MG HS or MG4, the good news is the principle is the same: the OBD2 port lives in the driver's side footwell area, near the steering column, behind the lower trim.
The MG4, built on MG's newer MSP platform, follows the same OBD2 standard, so the scanners and apps above apply there too. Exact trim shapes differ slightly between models, but the "look up behind the lower dash on the driver's side" rule holds across the MG range.
