MERCEDES OM651 Diesel Injectors
Buy MERCEDES OM651 diesel injectors, OEM tested and calibrated to original specifications. All injectors include 12-month warranty and are in stock for fast UK delivery.
0 compatible injectors • OEM Tested • 12-Month Warranty
Remanufactured Injector stocks MERCEDES OM651 diesel injectors tested to OEM specifications. Each OM651 injector includes new seals, nozzles, and 12-month warranty. UK-based specialists with same-day dispatch. Find your exact part below.
This page covers injector problems, symptoms, and verified solutions for OM651 engines.
Used by UK garages daily
Every injector is tested before dispatch — if the fault persists, you're covered by our 12-month warranty.
For OM651 engines, most issues are confirmed with testing before replacement.
What happens next
Take your time — we're here when you're ready.
The Mercedes OM651 is a 2.1-litre four-cylinder diesel that powered Mercedes-Benz vehicles from 2008 to 2020. Available in outputs from 136PS to 204PS, the OM651 uses Delphi common rail injectors renowned for their durability. Our remanufactured OM651 injectors restore the refined performance Mercedes owners expect.
Vehicles Using the OM651 Engine
MERCEDES C200 CDI / C220 CDI / C250 CDI
C-Class W204/W205
2008-2020
MERCEDES E200 CDI / E220 CDI / E250 CDI
E-Class W212/W213
2009-2020
MERCEDES Sprinter 210/213/216
Sprinter 906
2009-2018
MERCEDES Vito 109/111/114
Vito W639/W447
2010-2020
MERCEDES GLC 220d / GLC 250d
GLC X253
2015-2020
Common OM651 Injector Problems
Black Death - carbon buildup around injector seals (infamous OM651 issue)
Delphi injector electrical connector failures
Copper washer degradation causing compression leaks
Injector bore wear in aluminium cylinder heads
Fuel dilution issues from faulty injector sealing
Available MERCEDES OM651 Injectors
No injectors currently listed for the OM651 engine code.
Browse all MERCEDES injectors →Why Remanufactured Injectors Are Recommended for OM651
OM651 injectors require Mercedes Star Diagnosis (XENTRY) for coding. The infamous "Black Death" issue often requires cylinder head cleaning before refitting injectors. Check engine-specific torque values before installation and use calibrated test equipment for verification. Torque to 7Nm.
The MERCEDES OM651 engine requires injectors calibrated to specific flow rates and spray patterns. At Remanufactured Injector, our technicians test every OM651 injector to original manufacturer specifications using OEM-grade diagnostic equipment.
MERCEDES OM651 Injector Cost
MERCEDES OM651 diesel injector replacement cost UK ranges from £150 to £400 per injector for remanufactured units. The OM651 engine uses precision-calibrated injectors that require exact flow rates and spray patterns.
Testing OM651 injectors costs £20 each and confirms which specific injector is causing problems. Common OM651 symptoms like rough idle, black smoke, or poor fuel economy often stem from just one faulty injector.
Our remanufactured OM651 injectors are tested to MERCEDES original specifications with new seals, nozzles, and 12-month warranty included. Same performance as new, significantly lower cost.
When to Test vs When to Replace
Test Injectors When...
- • Engine warning light appeared but car still runs
- • Fuel economy has dropped noticeably
- • Rough idle or hesitation on acceleration
- • You want to confirm which injector is faulty before buying
- • Garage quotes full set replacement but you want a second opinion
Replace Injectors When...
- • Testing has confirmed injector failure
- • Visible damage, leaks, or Black Death carbon buildup
- • High mileage (150,000+ miles) and multiple symptoms
- • Previous repair attempt failed
- • Vehicle is undriveable or will not start
What Most Customers Choose
Testing first. At £20 per injector, testing identifies exactly which unit needs replacing — saving an average of £300-£600 by avoiding unnecessary full-set replacement. If testing confirms failure, we credit the test cost against your injector purchase.
Common Questions
Will this fix my problem?
If your issue is caused by a faulty injector, yes. Our injectors are tested to OEM specifications and will restore proper fuel delivery. If you're unsure, we recommend testing first — it's only £20 per injector and confirms exactly what's wrong.
What if testing shows they're OK?
That's good news — it means your injectors aren't the problem. You've spent £80 to potentially save £600+ on unnecessary parts. We'll help you identify other possible causes based on your symptoms.
How fast is delivery?
Next working day delivery on orders before 2pm (UK mainland). Most items ship same day from our UK warehouse. You'll receive tracking details by email once dispatched.
Same decision most professional mechanics make.
What You Get
No irreversible steps until results are confirmed.
MERCEDES OM651 Injector FAQs
Content reviewed for accuracy in 2026
Other MERCEDES Engine Codes
Common Problems with MERCEDES OM651 Injectors
The MERCEDES OM651 engine commonly experiences injector issues related to the infamous "Black Death" carbon buildup around injector seals, electrical connector corrosion, and copper washer degradation causing compression leaks. Mercedes OM651 injectors require specialist attention to prevent cylinder head damage. Professional testing identifies exactly which injector is failing before expensive replacements.
Symptoms of Failing MERCEDES OM651 Injectors
Failing MERCEDES OM651 injectors typically cause: rough idle or vibration at standstill, excessive white or black smoke on startup, poor acceleration and "limp mode" activation, increased fuel consumption (10-20% worse), engine warning light with P0201-P0204 fault codes, hard starting especially when cold, and diesel knock or rattling sounds. Early diagnosis prevents secondary damage to turbochargers, DPF systems, and cylinder walls. If you notice any of these symptoms, professional injector testing (£20/injector) can confirm the diagnosis before committing to replacement.
Popular MERCEDES Models
Browse Mercedes diesel injectors by vehicle model.
Mercedes C-Class
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Mercedes C220
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Mercedes E220
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Mercedes Sprinter
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Related MERCEDES OM651 Resources
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This guide is updated regularly to reflect the latest injector data and testing standards.
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