Volkswagen Passat2020

Known issues

• DPF (diesel particulate filter) clogging and forced regeneration cycles, particularly on cars driven in short urban journeys with extended service intervals
• DSG7 gearbox juddering or hesitation during low-speed manoeuvres and stop-start traffic, sometimes requiring software updates or gearbox recalibration
• EGR (exhaust gas recirculation) valve carbon build-up causing rough idle and potential limp-mode activation
• Diesel injector carbon deposits leading to starting difficulty and increased emissions after 80,000+ miles without professional cleaning
• Water ingress into cabin through door seals and window channels, causing interior trim corrosion and electrical gremlins
• AdBlue system sensor faults and false low-level warnings, occasionally requiring sensor replacement

Good for

• Real-world fuel economy of 45–50 mpg on mixed driving, significantly better than petrol equivalents
• Smooth, refined diesel engine with strong mid-range torque suitable for motorway cruising and towing
• Spacious, comfortable interior with excellent boot capacity (641 litres) and quality cabin materials
• Excellent parts availability and aftermarket support; easy and cost-effective to service at independent garages