OM651 (early) vs OM654

Side-by-side reliability comparison

Higher reliability score
OM654 BEST 85/100
+47 points over OM651 (early)
0 / 100
AVOID OM651 (early) Mercedes-Benz
0 / 100
BEST OM654 Mercedes-Benz

Specifications

OM651 (early)
OM654
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
AVOID
BEST
Reliability
38
85
Years
2008--2014
2016--present
Displacement
2143 cc
1950 cc
Layout
I4
I4
Type
Diesel
Diesel
Power
136--204 hp
150--245 hp
Known Issues
3
2
Total Risk Cost
€2,700--€7,200
€500--€1,500

Character

OM651 (early)

"Pre-2014: injectors, timing chain, DPF. Hard to work on."

OM654

"Best modern MB diesel. Aluminium block, low friction. Long-distance champion."

Issues Comparison

OM651 (early) 3

◆ CRITICAL
Piezoelectric injector failure (pre-2014) €1,200--€3,500 60,000 km--130,000 km
◆ CRITICAL
Timing chain stretch (pre-2014) €1,000--€2,500 80,000 km--150,000 km
▲ HIGH
DPF + EGR fouling (city use) €500--€1,200 60,000 km--120,000 km

OM654 2

○ MINOR
DPF — better than older MB diesels but still diesel €300--€1,000 80,000 km--150,000 km
○ MINOR
Minor EGR fouling (best-in-class but not immune) €200--€500 100,000 km--180,000 km

Models

OM651 (early) 34

E-Class W210 1998--2002 E-Class W210 1998--2002 C-Class W202 1997--2000 C-Class W202 1998--2000 C-Class W203 2001--2007 A-Class W169 2004--2012 A-Class W169 2005--2012 A-Class W169 2004--2012 CLK W209 2005--2009 E-Class W211 2002--2009 C-Class W203 2003--2007 E-Class W211 2006--2009 E-Class W211 2002--2006 GLA X156 2014--2020 CLA C117 2013--2019 GLK X204 2010--2015 GLC X253 2015--2019 B-Class W246 2014--2018 C-Class W204 2007--2014 E-Class W212 2009--2016 E-Class W212 2009--2016 A-Class W176 2014--2018 C-Class W205 2014--2018 E-Class W212 2009--2016 GLE W166 2015--2019 GLC X253 2015--2019 C-Class W205 2014--2018 CLA C117 2013--2019 A-Class W176 2014--2018 GLK X204 2008--2015 C-Class W204 2008--2014 GLC X253 2015--2019 GLA X156 2014--2020 C-Class W204 2007--2014

OM654 47

B-Class W246 2012--2018 A-Class W176 2012--2018 GLA X156 2014--2020 A-Class W176 2016--2018 C-Class W205 2017--2018 C-Class W205 2018--2021 GLC X253 2019--2022 E-Class W213 2016--2023 GLC X253 2019--2022 E-Class W213 2016--2023 GLE W167 2019--present E-Class W213 2018--2023 C-Class W205 2018--2021 C-Class W205 2018--2021 GLC X253 2019--2022 GLC X254 2022--present E-Class W214 2024--present C-Class W206 2021--present E-Class W214 2024--present GLC X254 2022--present C-Class W206 2021--present C-Class W206 2021--present GLC X254 2022--present E-Class W214 2024--present CLA C118 2019--present A-Class W177 2019--2025 CLA C118 2019--present B-Class W247 2019--2023 GLA H247 2020--present GLA H247 2020--present A-Class W177 2018--2025 E-Class W213 2018--2023 S-Class W222 2018--2020 GLE W167 2019--present E-Class W213 2018--2023 G-Class W463 2nd 2018--present E-Class W214 2024--present G-Class W463 2nd 2019--present G-Class W463 2nd 2024--present S-Class W222 2018--2020 S-Class W222 2017--2020 S-Class W223 2020--present GLE W167 2019--present S-Class W223 2020--present C 220d Wagon S205 2014--2021 Wagon E 220d Wagon S213 2016--2024 Wagon GLC 220d Coupe C253 2016--2023 SUV
Full OM651 (early) Report Full OM654 Report