W8 4.0 (BDN/BDP) vs 1.9 TDI VE (1Z/AHU/AFN/ALH/ASV/AHF/AGR)

Side-by-side reliability comparison

Higher reliability score
1.9 TDI VE (1Z/AHU/AFN/ALH/ASV/AHF/AGR) BEST 89/100
+28 points over W8 4.0 (BDN/BDP)
0 / 100
CAUTION W8 4.0 (BDN/BDP) Volkswagen
0 / 100
BEST 1.9 TDI VE (1Z/AHU/AFN/ALH/ASV/AHF/AGR) Volkswagen

Specifications

W8 4.0 (BDN/BDP)
1.9 TDI VE (1Z/AHU/AFN/ALH/ASV/AHF/AGR)
Brand
Volkswagen
Volkswagen
Verdict
CAUTION
BEST
Reliability
61
89
Years
2001--2004
1991--2006
Displacement
3999 cc
1896 cc
Layout
W8
I4
Type
Petrol Na
Diesel
Power
275 hp
75--110 hp
Known Issues
3
8
Total Risk Cost
€4,000--€0
€1,571--€4,540

Character

W8 4.0 (BDN/BDP)

"Volkswagen's 4.0 W8 (2001-2004), sold only in the Passat W8 4motion: two narrow-angle VR4 banks, 275 PS, three timing chains at the back of the engine. Smooth, but extremely complex. The plastic chain tensioners and guides wear and the camshaft adjusters fail (about EUR 4,000), and the chain drive and even the lambda sensors need the engine out. It is sensitive to overheating, which can scuff the cylinders. Ignition coils fail. Buy only with proof of chain work."

1.9 TDI VE (1Z/AHU/AFN/ALH/ASV/AHF/AGR)

"The rotary-pump TDI that built the legend. Simple VP37 injection, 500,000 km examples are documented. Weak spots are wear items: injection-pump seals, VTG turbo vanes, EGR soot and the dual-mass flywheel. Keep the timing belt on schedule - it is an interference engine."

Issues Comparison

W8 4.0 (BDN/BDP) 3

◆ CRITICAL
Timing chain tensioners, guides and camshaft adjusters (engine-out job) €4,000--N/A N/A--200,000 km
▲ HIGH
Overheating sensitivity - cylinder scuffing and oil use N/A--N/A N/A--N/A
● MODERATE
Ignition coil failure - misfire N/A--N/A N/A--N/A

1.9 TDI VE (1Z/AHU/AFN/ALH/ASV/AHF/AGR) 8

▲ HIGH
Timing belt - interference engine, 60,000-120,000 km interval by variant N/A--N/A 60,000 km--120,000 km
▲ HIGH
Timing belt replacement — interference engine €250--€500 60,000 km--90,000 km
● MODERATE
VP37 injection pump seals and electronics wear €70--€420 N/A--N/A
● MODERATE
VTG turbo vanes and actuator sticking (AFN/ALH/ASV) €80--€520 N/A--N/A
● MODERATE
Dual-mass flywheel wear €235--€580 160,000 km--N/A
○ MINOR
EGR valve sooting and intake clogging €36--€120 130,000 km--160,000 km
○ MINOR
Turbo wear at very high mileage €500--€1,200 200,000 km--∞
○ MINOR
Injection pump wear (very high mileage) €400--€1,200 250,000 km--∞

Models

W8 4.0 (BDN/BDP) 1

Passat B5 (3B) 2001--2004

1.9 TDI VE (1Z/AHU/AFN/ALH/ASV/AHF/AGR) 15

Golf Mk3 (1H) 1996--1997 Ibiza 6K 1996--2002 Ibiza Mk2 (6K) 1996--2002 A4 B5 1996--2001 A4 B5 1996--2001 Octavia 1U 1997--2004 Octavia 1U 1996--2004 Leon 1M 1999--2005 Leon Mk1 (1M) 1999--2006 Golf Mk4 (1J) 1997--2003 Toledo Mk2 (1M) 1999--2004 A3 8L 1996--2003 Ibiza Mk2 (6K) 1999--2002 Passat B5 (3B) 1996--2005 Golf 1.9 TDI MK4 1997--2004 Hatchback
Full W8 4.0 (BDN/BDP) Report Full 1.9 TDI VE (1Z/AHU/AFN/ALH/ASV/AHF/AGR) Report