M135 1.3/1.5 vs OM660 0.8 CDI

Side-by-side reliability comparison

Higher reliability score
M135 1.3/1.5 ACCEPTABLE 72/100
+17 points over OM660 0.8 CDI
0 / 100
ACCEPTABLE M135 1.3/1.5 Smart
0 / 100
CAUTION OM660 0.8 CDI Smart

Specifications

M135 1.3/1.5
OM660 0.8 CDI
Brand
Smart
Smart
Verdict
ACCEPTABLE
CAUTION
Reliability
72
55
Years
2014--2019
2000--2014
Displacement
1332 cc
799 cc
Layout
I4
I3
Type
Petrol Na
Diesel
Power
71--109 hp
41--54 hp
Known Issues
2
2
Total Risk Cost
€300--€1,200
€700--€2,000

Character

M135 1.3/1.5

"ForTwo/ForFour 453. Mitsubishi 3A9 engine (Mirage/Space Star). NA 1.0 (71hp) and 1.3 (109hp). Brabus 1.5 turbo (177hp) rare. Simple, reliable for what it is. Timing chain. CVT on ForTwo can be jerky. Better than old M132."

OM660 0.8 CDI

"ForTwo 450/451. Smallest production diesel. Turbo failure on 54hp version. DPF on 451. EGR. Quirky but fragile. Specialist Smart workshops only."

Issues Comparison

M135 1.3/1.5 2

● MODERATE
CVT jerkiness (ForTwo) €0--€500 40,000 km--100,000 km
● MODERATE
Timing chain tensioner wear €300--€700 100,000 km--180,000 km

OM660 0.8 CDI 2

▲ HIGH
DPF (451 model) €300--€1,000 40,000 km--80,000 km
▲ HIGH
Turbo failure (54hp CDI) €400--€1,000 60,000 km--120,000 km

Models

M135 1.3/1.5 2

ForFour W454 2004--2006 ForFour W454 2005--2006

OM660 0.8 CDI 2

ForTwo W451 2007--2014 ForTwo W450 2000--2007
Full M135 1.3/1.5 Report Full OM660 0.8 CDI Report