Factory Navigation Adds Value — But Only If It Works
A car listed with factory navigation commands a premium over the same model without it. But not all factory nav systems are equal — the maps may be years out of date, the SD card may be missing, or the system may have a fault that’s easily hidden during a short test drive. Knowing what to check before you buy saves you from an expensive surprise.
Check 1: Is the Navigation SD Card Present?
For all SD card-based navigation systems, the card must be present for the navigation to function. Before or during your test drive, locate the SD card slot (glovebox, centre console or head unit face — see our brand guides) and confirm a card is inserted. A missing card means the navigation won’t work — and sourcing a replacement map card is an additional cost on top of the purchase price.
Ask the seller directly: “Is the original navigation SD card included?” If they’re unsure or say it’s lost, factor the cost of a replacement card into your offer.
Check 2: What Map Version Is Installed?
Go to Navigation Settings → Map Version on the infotainment screen. Note the version and year. A map version from 2020 or earlier means the system is significantly out of date — new junctions, roads and speed limits will be missing. This doesn’t make the car a bad buy, but it does mean budgeting for a map card update on top of the purchase price.
Check 3: Does the Navigation Actually Work?
On your test drive, enter a destination and confirm the system routes you correctly. Check that:
- The GPS position icon matches your actual location
- Voice guidance works through the car’s speakers
- The map scrolls smoothly without lag or freezing
- The screen is responsive to touch (if touchscreen) or knob input
A sluggish or unresponsive navigation system on a test drive may indicate a software issue or a failing SD card.
Check 4: Is the Screen in Good Condition?
Factory navigation screens are expensive to replace — often £500–£2000 depending on the brand and model. Look for:
- Dead pixels (usually visible as black spots when the screen is on)
- Scratches across the touchscreen surface
- Screen delamination (a hazy or cloudy layer visible in certain light)
- Backlight issues (screen dimmer than expected, or uneven brightness)
Check 5: What Navigation System Does It Have?
Knowing the exact navigation system helps you understand future update costs. A 2015 BMW with NBT navigation uses a readily available SD card. A 2010 Jaguar with the legacy navigation system may have limited update availability. Ask the seller for the car’s build spec or check the VIN on the manufacturer’s specification checker.
Negotiating on Navigation
If the maps are significantly out of date, use this as a negotiating point. A current navigation map card for most vehicles costs £30–£80. It’s a small but real cost that justifies a modest reduction in asking price, or asking the seller to include an updated card as part of the deal.