Is the Bosch 12334322 compatible with the Mercedes B-CLASS?

Yes. The Bosch 12334322 is a direct replacement diesel injector for the Mercedes B-CLASS 1.8L and the other listed applications. Always confirm fitment by engine code or vehicle registration before ordering.

Does the Bosch 12334322 require injector coding?

No injector coding is required for the Bosch 12334322 on most applications. Always follow the manufacturer's fitting procedure.

Is the 12334322 supplied tested?

Yes. Every Bosch 12334322 is OEM bench-tested and calibrated to manufacturer tolerances before dispatch.

Is a warranty included with the 12334322?

Yes. The Bosch 12334322 includes a 12 months warranty as standard, with free UK delivery.

Is an exchange or core return required?

No core exchange is required for the Bosch 12334322. The price shown is the full price — nothing further to pay or return.

Is the 12334322 injector new or remanufactured?

This Bosch injector is professionally remanufactured. It's fully stripped, cleaned, rebuilt with new internal components, tested on flow test equipment, and calibrated to OEM specification. Comes with a 12 months warranty.

Does the 12334322 injector require coding after fitting?

Most modern common-rail diesel vehicles require injector coding after installation. The IMA code (injection quantity adjustment) is programmed into the ECU. If you're unsure whether the 12334322 needs coding for your vehicle, contact us with your registration.

What vehicles does the 12334322 injector fit?

The 12334322 is commonly fitted to Mercedes diesel models. Full application list is shown above. For exact fitment confirmation, enter your vehicle registration or contact us with your VIN.

What warranty is included with the 12334322?

This injector includes a 12 months warranty covering manufacturing defects. The warranty does not cover fitting damage, contaminated fuel systems, or electrical faults. We recommend professional fitting by a diesel specialist.

Is there a surcharge or core exchange required?

No core exchange or surcharge is required. Simply order, fit, and dispose of your old injector responsibly. Some injector suppliers require you to return your old part – we don't.

Can you confirm the 12334322 fits my vehicle before I order?

Yes. Send us your vehicle registration or VIN and we'll confirm exact compatibility before dispatch. We check against manufacturer data to ensure the correct injector for your engine variant.

Bosch injector professional packaging and quality control

Zoom1 / 3In Stock

Need Help Confirming Fitment?

Not sure this injector fits your vehicle? Check using your registration number before ordering.

Engine Code or Cross Reference

Bosch 12334322 Diesel Injector

Name: Remanufactured Bosch Diesel Injector 12334322
Brand: Bosch
SKU: 12334322
Price: 249.90 GBP
Availability: InStock

BOSCH

Part No: 12334322

·Trade & Garage Friendly

Not 100% sure? or call us.

In Stock — Ships within 24 hours

Often fitted during workshop investigations of misfire, smoke from exhaust, or elevated fuel consumption on OM607 diesel engines, the Bosch 12334322 is supplied remanufactured, flow-tested, and covered by a 12 months warranty. Each unit is supplied with a 12 months warranty and free UK delivery.

£250inc. VAT

(per injector)

All prices are shown in GBP (£). International customers are securely charged in GBP via Stripe.

Save 38% vs OEM price

Professionally remanufactured to OEM standards

Ordering a single injector is standard practice.

Need multiple injectors? Simply increase the quantity above.

Every order includes a 12-month workshop warranty, OEM bench-calibration before despatch.

Most 4-cylinder engines use 4 injectors — replace only what your diagnosis confirms.

In stockTested & calibrated12-month warranty

12-Month Warranty

Included on every remanufactured injector. UK-based support if you ever need it.

Tested Before Dispatch

Flow-tested and calibrated on OEM-grade rigs. Test report on file for every unit.

Free UK Delivery

Mainland tracked dispatch. Order before 2pm for same-working-day pick-up.

Trade buyers: VAT receipt included · Account terms on request · Trusted by UK garages & diesel specialists.

12 Compatible Engine Codes

Mercedes OEM Replacement

OEM Bench Tested

Why Buy From Us

OEM Bench Tested & Calibrated

12 Month Warranty

Free UK Delivery

UK Diesel Injector Specialists

Technical Support Available

Not sure this is the right injector? Call us on 020 3355 6581

Free UK Delivery Same-Day Dispatch

FREE UK Delivery

International Delivery — flat £50 per order

One injector or multiple injectors

Ships Worldwide

FREE UK Delivery

Flat £50 International Shipping

Royal Mail Tracked
DPD International
Secure Packaging
Tracking Number Included
12 Month Warranty

Need more later? We keep stock available for repeat orders.

Engine Intelligence

Diesel Engine

Common symptoms

Fitment note: Always confirm compatibility using registration lookup or part number before ordering.

Why this injector?

Mercedes-Benz 2.1 CDI (OM651)

Suited to the OM651 2.1 CDI platform used across Mercedes-Benz C-Class, E-Class, Vito, Sprinter and related models.
Bench-tested for flow, spray pattern and leak-off so ECU correction values stay within specification.
A typical replacement when diagnosing rough idle, smoke or EML-logged injector-range faults on OM651 engines.
Injector coding is usually required after fitting — plan time and equipment at the workshop.

Explore this range

Remanufacturing Process

Injector fully dismantled

Internal components cleaned and inspected

Worn parts replaced

Reassembled and calibrated

Tested before dispatch

See how our injectors are rebuilt step-by-step in our 3D remanufacturing process video.

Vehicles Compatible With This Bosch Injector

Compatible with Mercedes engines including OM607, OM608, OM612, OM626, OM628 and 7 more.

Make	Model	Engine	Years
Mercedes	B-CLASS	1.8L	2011-2014

Vehicles Using This Injector

Mercedes B-CLASS injector

Compatible Engines

The 12334322 injector is compatible with the following engines:

OM607–1.8 CDI OM608–1.8 CDI OM612–1.8 CDI OM626–1.8 CDI OM628–1.8 CDI OM629–1.8 CDI OM640–1.8 CDI OM642–1.8 CDI OM646–1.8 CDI OM647–1.8 CDI OM648–1.8 CDI OM651–1.8 CDI

Also known as

This injector is sold and listed under the references below. Tap any number to copy it — every reference refers to this same product.

All references resolve to this canonical product page. Always confirm exact fitment before ordering.

Compatible Vehicles

This injector fits the following vehicles. Always confirm exact fitment by engine code or registration before ordering.

Mercedes B-CLASS 1.8L

Product Description

Each unit is supplied with a 12 months warranty and free UK delivery.

Workshop Information

Installation Notes

Professional injector coding may be required after installation
Use calibrated test equipment for verification
Check engine-specific torque values before installation

Recommended Injector Coding

No injector coding is required for the Bosch unit on most applications — follow the manufacturer fitting procedure.

Replacement Advice

Always renew the copper washers / seals and bleed the fuel system before first start. Replace only the injectors your diagnosis confirms and torque fasteners to the manufacturer's published values.

Professional Installation

We recommend installation by a suitably equipped diesel specialist using calibrated test equipment to verify the fuel system after fitting.

Common Engines Using This Injector

OM607 OM608 OM612 OM626 OM628 OM629 OM640 OM642 OM646 OM647 OM648 OM651

Common Symptoms of a Failed 12334322 Injector

Hard starting Rough idle Excessive smoke Poor fuel economy Engine misfires Loss of power under load

If your vehicle shows these symptoms, replacing the diesel injector may restore engine performance. A leak-off test can confirm the diagnosis.

Testing & Warranty

All remanufactured injectors are tested using OEM-grade diagnostic equipment to ensure fuel pressure and spray pattern meet manufacturer specifications.