0261500109
BOSCH 0261500109 Iniettore Diretto Benzina BMW N20 N55 2.0T 3.0T
13647639994, 13647597870, 13644596001, 13647639995--200 barPanoramica Prodotto
The Bosch 0261500109 (BMW OE 13647639994) is the OEM high-pressure gasoline direct injection (GDI) fuel injector engineered for BMW N20 2.0L 4-cylinder and N55 3.0L 6-cylinder TwinPower Turbo engines. Operating at rail pressures up to 200 bar (2900 psi), this high-impedance solenoid injector features multi-hole precision laser-drilled micro-orifices that deliver a stratified, optimized fuel mist directly across the spark plug gap. Over time, internal seat erosion causes fuel dripping after engine shutdown, resulting in hard cold starts, raw fuel odor, cylinder misfires (P0300/P0301-P0306), and positive fuel trim deviations. Replacing worn injectors with new Bosch OE units restores peak combustion efficiency, eliminates rich fuel trim codes, and protects engine bearings from gasoline dilution.
OIL DILUTION & ROD BEARING WARNING: A dripping N20/N55 fuel injector washes engine oil from cylinder walls and dumps raw fuel into the crankcase. Diluted 0W-20 or 5W-30 oil loses dynamic film strength under load, resulting in catastrophic connecting rod bearing failure and spun bearings. Never install direct injectors without sizing replacement Teflon combustion seals using BMW tool 13 0 190; uncalibrated seals gouge during insertion, leading to combustion chamber blow-by.
Applicazioni Veicolo e Motore
| Veicolo | Motore | Anni |
|---|---|---|
| BMW 3 Series F30 / F31 (320i / 328i / 335i) | BMW N20 / N26 / N55 / S55 (2.0L & 3.0L TwinPower Turbo) | 2012-2016 |
| BMW 5 Series F10 / F11 (520i / 528i / 535i) | BMW N20 / N26 / N55 / S55 (2.0L & 3.0L TwinPower Turbo) | 2011-2017 |
| BMW X3 F25 / X4 F26 (xDrive28i / xDrive35i) | BMW N20 / N26 / N55 / S55 (2.0L & 3.0L TwinPower Turbo) | 2011-2017 |
| BMW X5 F15 / X6 F16 (xDrive35i) | BMW N20 / N26 / N55 / S55 (2.0L & 3.0L TwinPower Turbo) | 2014-2018 |
Specifiche Tecniche
| Specifica | Valore |
|---|---|
| Injector Generation | Bosch HDEV-5.2 High Pressure Gasoline Solenoid Injector |
| Operating Rail PressureSpecifica Chiave | |
| Spray Pattern | Multi-Hole Laser Drilled Cone (TwinPower Chamber Match) |
| Minimum Injection Duration | 0.24 milliseconds |
| Coil Resistance | 11.5 to 12.8 Ohms at 20°C (High-Impedance) |
| Combustion Seal Type | Combustion Chamber Virgin Teflon (PTFE) Ring |
| Teflon Ring Service Kit | BMW OE 13647599859 / 13647600869 |
| Special Assembly Tool | BMW Special Tool 13 0 190 Calibration & Sizing Tool Set |
| Injector Hold Down Clamp Torque | 13 N·m (Torx M6, even clamp tension)📐 Calcolatore Coppia e Angolo → |
| Fuel Rail Retaining Torque | 10 N·m (Torx M6) |
| Tightening Torque | 13 N·m |
| Coppia serraggio staffa | 13 N·m |
| ECU Calibration Coding | Energy & Flow Calibration Values via ISTA Diagnostics |
| Pressione di esercizioSpecifica Chiave |
Pompa alta pressione abbinata (Gruppo circuito carburante)
Funziona sullo stesso circuito ad alta pressione Common Rail. In caso di bassa pressione rail (P0087), verificare la portata della pompa prima di sostituire gli iniettori.
Istruzioni di montaggio
Attrezzatura necessaria: BMW Special Tool 13 0 190 Teflon seal installation cone, sizing sleeve & puller kit, Torque wrench calibrated for 10-13 N·m range, Brass bore brush and lint-free cotton cleaning swabs, Clean engine oil or synthetic assembly grease for top Viton rail O-rings, ISTA/D diagnostic software or compatible scan tool for injector adaptation coding
- De-energize the fuel system and bleed residual high pressure via ISTA service functions or by cracking the rail flare fitting wrapped in absorbent shop towels.
- Remove engine acoustic covers, intake charge pipes, and wiring harness bridges above the fuel rail.
- Disconnect electrical harness connectors from each injector and unbolt the high-pressure fuel rail brackets.
- Attach BMW 13 0 190 slide-hammer puller to the injector neck and pull the injector straight up along its center axis.
- Clean carbon deposits and varnish from cylinder head injector bores using a brass seat brush; vacuum out all loose debris.
- Cut away old white Teflon combustion seals using a plastic pick, taking care not to scratch the precision seal groove.
- Slide the new Teflon ring over assembly cone 13 0 190/1 into the groove; immediately slip sizing sleeve 13 0 190/2 over the seal and compress for 3 minutes.
- Install a new Viton O-ring onto the fuel rail inlet neck lubricated with clean engine oil (never lubricate the lower Teflon seal).
- Insert injectors into cylinder head bores with hold-down brackets aligned, push down firmly by hand until seated.
- Torque hold-down bracket bolts evenly to 13 N·m and fuel rail mounting bolts to 10 N·m.
- Prime the low-pressure fuel pump, inspect for leaks, and enter the individual 6-digit calibration compensation values into the DME using ISTA.
- Teflon Combustion Ring Lubrication Prohibition: Never apply oil, penetrating fluid, or silicone grease to the lower Teflon combustion ring. Teflon requires clean, dry contact with the cylinder head bore to expand under engine heat and seal 200 bar combustion pressures.
- Sizing Sleeve Dwell Time Requirement: After sliding the Teflon ring onto the injector tip, the PTFE material is severely stretched. You MUST leave sizing sleeve 13 0 190/2 clamped over the seal for at least 3 minutes to shrink it back to bore diameter before insertion.
- Straight Extraction Alignment: Always extract and insert direct injectors strictly perpendicular to the cylinder head bore. Prying sideways with a pry bar bends the stainless steel nozzle tip or snaps the plastic electrical connector body.
Domande Frequenti (FAQ)
What diagnostic symptoms indicate a leaking 0261500109 injector on BMW N20 or N55?
Key symptoms include extended cold-start cranking, a strong puff of black fuel smoke on initial start-up, rough idle stumbling for 30 seconds after cold start, cylinder misfires (P0300, P0301-P0306), and positive fuel trim deviations on the affected cylinder bank.
How does a leaking fuel injector cause connecting rod bearing failure on BMW N20/N55 engines?
When an injector drips after engine shutdown, liquid fuel puddles on the piston crown and drains past the piston rings into the oil pan. This unburnt gasoline rapidly dilutes engine oil, shearing oil viscosity from 5W-30 down below safe thresholds. Under full throttle boost, the depleted oil film collapses under high combustion load, causing connecting rod bearing friction, metal-to-metal contact, and spun rod bearings.
Do Bosch 0261500109 direct injectors require coding into the BMW DME computer?
Yes. Each Bosch HDEV-5.2 injector is laser-etched on its upper plastic housing with calibration compensation values representing energy and flow characteristics. Entering these values via ISTA allows the DME to calculate microsecond injection timing precisely for smooth idle and optimal emissions.
Can I replace just one failed direct injector on my BMW N20 or N55?
While replacing a single failed injector is mechanically possible, high-mileage injectors generally share similar internal seat wear. Replacing direct injectors in complete sets (all 4 on N20, all 6 on N55) or at least by cylinder bank ensures uniform fuel atomization, balanced cylinder contribution, and prevents subsequent failures.
Say this to the shop: How do I verify a leaking injector before paying for labor?
Ask the technician: 'Before replacing parts, please hook up a diagnostic scanner, monitor high-pressure fuel rail leakdown after shutdown from 70 bar, and inspect spark plug tips after overnight parking. If rail pressure collapses within 3 minutes and cylinder 2 spark plug is wet with raw gasoline, we have confirmed an injector leak without unnecessary trial-and-error.'
Codici Guasto (DTC) e Protocolli Diagnostici
Codici guasto diagnostici (DTC) comuni generati quando questo iniettore common rail presenta usura, problemi ai circuiti o scostamenti:
Fuel Rail / System Pressure Too Low
Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.
Injector Circuit Malfunction / Open Circuit
Solenoid coil resistance drift (0.2-0.5 Ω) or piezo stack degradation triggers driver stage shutdown on affected cylinders.
Cylinder Misfire & Balancing Deviation
Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.
Fuel Rail / System Pressure Too High
Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.
Riferimenti incrociati e compatibilità
Codici gemelli, varianti della stessa piattaforma e incompatibilità note.
Protocolli Tecnici di Diagnosi & Assistenza
Procedure d'officina verificate, valori soglia di test e linee guida operative per questo assieme.