Engine Family
OM651 (2.1L CDI)
Mercedes-Benz OM651 Engine – Specs, Reliability & Replacement Cost
The Mercedes OM651 is Mercedes' most common modern diesel four – dependable, but the 'Black Death' injector seal issue is well documented. Backed by 1,250+ real UK enquiries in 2025 [MB-VERIFIED].
1,250+
Enquiries
12+
Models
Fitted
/100
Engine
Score
Part of Engine Finders
Jaguar OM651 (2.1L CDI) Engine Overview
All the essential specifications, performance data, and compatibility information at a glance.
Engine Family
OM651 (2.1L CDI)
Fuel
Diesel
Configuration /
Displacement
2.1L inline-4 turbo
Power Range
109–204 hp (variants)
Years Produced
2008–2020
Models Fitted (BMW only)
Cross-Brand Fitment
Exclusive to Mercedes-Benz
Overall Engine Score
TBC/100/
★★★★☆
Verdict & Rating
Rating:
4
out of 5
92% confidence – based on 1,250 UK enquiries and cross-referenced specialist rebuild reports.
The OM651 is a strong, economical diesel four – the 'Black Death' injector seal issue is well-documented but preventable – insist on full service history.
Engine Score breakdown:
DimensionScore (of 20)
Reliability
Star rating (4.0★) × 4 = 16
16 /20
Repair Cost
Reconditioned midpoint: £3,800 → £3,000–£4,999 bracket = 16
16 /20
Repairability
Mix of cheap fixes (injector seals) and labour-intensive work (timing chain)
12 /20
Parts Supply
Parts cheap and available from multiple UK suppliers; high-volume engine
20 /20
Replacement Economics
Recon cost as % of lowest host value (~£4k) = 95% → over 75% = 4
4 /20
Total Engine Score
68 / 100
Best for:
High-mileage drivers who service on schedule.
Avoid if:
No documented injector seal or chain history above 80,000 miles.
Compatible Jaguar Models
Jaguar Engine engines are fitted across 10+ models from 2008–2020.
Jaguar Exclusive Engine
This is an exclusive Jaguar engine. No cross-platform sharing.
2008
12 Years of Production
2020C-Class
Generation
W204Variant/Badge
C200 CDI, C220 CDI, C250 CDI
Years
2008–2014
C-Class
Generation
W205Variant/Badge
C200d, C220d, C250d
Years
2014–2020
E-Class
Generation
W212Variant/Badge
E200 CDI, E220 CDI, E250 CDI
Years
2009–2016
E-Class
Generation
W213Variant/Badge
E200d, E220d, E250d
Years
2016–2020
GLC
Generation
X253Variant/Badge
GLC220d, GLC250d
Years
2015–2020
GLA
Generation
X156Variant/Badge
GLA200 CDI, GLA220 CDI
Years
2014–2020
GLK
Generation
X204Variant/Badge
GLK220 CDI, GLK250 CDI
Years
2009–2015
Sprinter
Generation
906/907Variant/Badge
211 CDI, 213 CDI, 215 CDI
Years
2008–2020
Vito
Generation
W639/W447Variant/Badge
111 CDI, 113 CDI, 116 CDI
Years
2008–2020
V-Class
Generation
W447Variant/Badge
V220d, V250d
Years
2014–2020
S-Class
Generation
W221/W222Variant/Badge
S250 CDI (selected markets)
Years
2009–2017
ML-Class
Generation
W166Variant/Badge
ML250 CDI
Years
2011–2015
Other Jaguar Models
Engine also appears in limited variants and markets.
Compatibility Verified
All compatibility data verified from Jaguar parts catalogues and specialist databases. [JAGUAR-VERIFIED]
(Exclusive mode – no cross-link)
Jaguar Engine Engine Price Guide
All prices are estimates from UK specialists [MB-QUOTE]
i
Fitting an OM651 typically takes 8–12 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer) [MB-QUOTE].
(Exclusive mode – no cross-link)
USED
Supply Only
£1,500–£2,800
[MB-QUOTE]
Fitted (Indie)
£2,150–£3,500
3–6 months
RECONDITIONED
Supply Only
£2,800–£4,800
[MB-QUOTE]
Fitted (Indie)
£3,450–£5,500
12 months
REBUILT
Supply Only
£4,000–£6,000
[MB-QUOTE]
Fitted (Indie)
£4,650–£6,700
12–24 months
Compare Prices from UK specialists
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Jaguar Engine Engine Price Guide
All prices are estimates from UK specialists
[MB-QUOTE]
USED
Supply Only
£1,500–£2,800
[MB-QUOTE]
Fitted (Indie)
£2,150–£3,500
Warranty
3–6 monthsRECONDITIONED
Supply Only
£2,800–£4,800
[MB-QUOTE]
Fitted (Indie)
£3,450–£5,500
Warranty
12 monthsREBUILT
Supply Only
£4,000–£6,000
[MB-QUOTE]
Fitted (Indie)
£4,650–£6,700
Warranty
12–24 monthsi
Fitting an OM651 typically takes 8–12 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer) [MB-QUOTE].
(Exclusive mode – no cross-link)
Frequently Asked Questions
Expert answers to the most common BMW Engine engine questions.
Why Owners Trust Us
Trusted Suppliers – Every garage and engine rebuilder in our network is vetted, rated and reviewed by real OM651 owners, as part of the Engine Finders network.
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