★★★★★
As Reviewed by Motor Verso
"One of the more thoughtfully designed car diagnostic apps to come out of the UK in recent years."
Demo Report — Sample Data
CarX
AI Diagnostic Report
2019 BMW 320d xDrive
BD19 KXF
0
Health Score
CarX Verified • Tamper-Proof
Battery
0
Marginal
Coolant
0
Normal
Fault Codes
3
3 Active
Odometer
0
km
AI Analysis
Is this car safe to drive?
CX
Yes, but with caution. The EGR valve issue (P0401) means your exhaust gas recirculation isn't working properly — this won't leave you stranded but it's increasing your emissions and could cause the engine to run rougher over time. The low battery voltage (12.1V) is borderline — if it drops below 12V you might struggle to start on cold mornings. I'd recommend getting the battery tested within 2 weeks. The catalytic converter code (P0420) is worth monitoring but not urgent.
How much will repairs cost?
CX
Here's a realistic breakdown for a 2019 BMW 320d:P0401 — EGR Valve: £280–£450 at an independent, £500–£700 at BMW dealer. The part is ~£180, rest is labour (2–3 hours). This is the priority fix.
P0420 — Catalytic Converter: If genuinely failing, £800–£1,400. But this code is often triggered by a faulty O2 sensor (£120–£200 fix). Get the sensor tested first — 40% of the time it's not the cat itself.
Battery: £120–£180 for a quality AGM battery (BMW spec). Easy DIY or £30 fitting at Halfords.
Total realistic estimate: £400–£850
Should I buy this car?
CX
It's a mixed picture. The 320d xDrive is a solid car — the B47 diesel engine is reliable and 67k km is relatively low mileage. However, three fault codes suggest the previous owner may have been ignoring maintenance. Key things to negotiate:• Use the fault codes to negotiate £500–£800 off the asking price
• Ask for service history — specifically if the EGR has been cleaned
• Check the DPF ash loading — common on BMWs at this age
• Battery is due for replacement regardless
Verdict: Buy if priced right, but factor in £500+ for immediate repairs.
Fault Codes
P0401
EGR — Insufficient Flow
The EGR valve is not recirculating enough exhaust gas. Common on diesel BMWs, usually caused by carbon buildup. Increases emissions and can cause rough running.
Est. repair: £280–£700
P0420
Catalytic Converter — Below Threshold
Catalyst isn't converting exhaust gases efficiently. Could be the cat itself or a faulty downstream O2 sensor — check sensor first (40% chance it's not the cat).
Est. repair: £120–£1,400
P0562
System Voltage Low
Electrical system voltage below expected range. Consistent with the 12.1V reading — battery likely needs replacement.
Est. repair: £120–£180
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Detailed Data
Demo report with sample data. Real reports are generated live from your car's OBD-II port. Covers electronic diagnostics only — not brakes, tyres, suspension, or bodywork.
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