Injector Replacement Cost Estimator

A single diesel injector replacement costs $600–$900 on pickups and $1,500–$2,500 on Class 8 systems in 2026, parts and labor included. A full set runs $2,500–$4,500 for six-cylinder pickups, $3,500–$6,500 for eight-cylinder Powerstroke and Duramax, and $6,000–$12,000 for Cummins ISX15 unit pumps. Use the calculator with engine, injector count, and part type. Fuel contamination often means replacing all injectors, not just the one that failed.

Injector Types by Engine Platform

Not all “injectors” are the same design. The repair approach and cost vary significantly:

Engine	Injector Type	Count	OEM Unit Price	Labor Per Unit
6.7L Cummins (2019+)	Common-rail solenoid	6	$450 – $520	1.5 – 2.0 hrs
6.7L Powerstroke (2017+)	Piezoelectric common-rail	8	$320 – $400	1.5 – 2.0 hrs
6.6L Duramax L5P	Piezoelectric common-rail	8	$380 – $480	1.5 – 2.0 hrs
Cummins ISX15 (pre-2017)	Unit pump (HPI-TP)	6	$1,100 – $1,400	2.0 – 2.5 hrs
Cummins X15 (2017+)	Common-rail	6	$800 – $1,100	2.0 – 2.5 hrs
Detroit DD15	Common-rail	6	$700 – $900	2.0 – 2.5 hrs
PACCAR MX-13	Common-rail	6	$750 – $950	2.0 – 2.5 hrs

Single Injector Replacement Cost

6.7L Cummins

Part Type	Part Cost	Labor (1.5–2 hrs)	Total
New OEM (Mopar 68057087AB)	$450 – $520	$195 – $320	$645 – $840
Remanufactured (Bosch)	$260 – $320	$195 – $320	$455 – $640
Aftermarket (Alliant Power)	$160 – $220	$195 – $320	$355 – $540

R&R procedure: remove valve cover, disconnect electrical connector and high-pressure fuel line, remove hold-down clamp bolt (torque to 37 ft-lbs on 6.7L), lift injector. Install new copper washer (included with injector). Prime fuel system before start.

6.7L Powerstroke

Part Type	Part Cost	Labor	Total
New OEM (Ford BC3Z-9H529-E)	$320 – $400	$195 – $320	$515 – $720
Remanufactured	$200 – $280	$195 – $320	$395 – $600
Aftermarket	$130 – $180	$195 – $320	$325 – $500

Powerstroke injectors sit under the valve cover in the rocker box. Labor is similar to Cummins but the engine has eight cylinders, so a full set costs more.

6.6L Duramax L5P

Injectors are in the center of the V — under the intake manifold. Single injector R&R is 2–3 hours because the intake must come off.

Full Set Replacement Costs

When one injector fails on a common-rail system, replace all injectors on that engine. Mismatched flow rates cause rough idle, check engine light, and accelerated wear on the remaining old injectors.

Engine	OEM Full Set	Reman Full Set	Aftermarket Full Set	Labor (All)
6.7L Cummins (6)	$2,700 – $3,120	$1,560 – $1,920	$960 – $1,320	$1,170 – $1,920
6.7L Powerstroke (8)	$2,560 – $3,200	$1,600 – $2,240	$1,040 – $1,440	$1,560 – $2,560
6.6L Duramax L5P (8)	$3,040 – $3,840	$1,840 – $2,400	$1,200 – $1,600	$2,080 – $3,840
ISX15 unit pumps (6)	$6,600 – $8,400	$4,500 – $5,400	$3,000 – $3,600	$1,560 – $2,400
DD15 common-rail (6)	$4,200 – $5,400	$3,000 – $3,600	$2,100 – $2,700	$1,560 – $2,400

Total installed for full set (6.7L Cummins OEM): $3,870 – $5,040

OEM vs Remanufactured vs Aftermarket

Factor	OEM	Remanufactured	Aftermarket
Price	Highest	35–45% less	55–65% less
Warranty	12–24 months	12–24 months	6–12 months
Flow matching	Factory spec	Re-tested to spec	Varies by brand
Core charge	Sometimes	Usually ($50–$150)	Rarely
Best for	Warranty repairs, resale	Daily drivers, high-mileage trucks	Budget, older trucks

Bosch and Delphi remanufactured injectors are rebuilt to OEM flow specifications and include new seals and washers. Alliant Power and Exergy aftermarket injectors have a solid track record on Cummins and Powerstroke platforms. Avoid no-name eBay injectors — I’ve seen three comebacks in one month from $89 Chinese injectors that leaked at the body seal.

Diagnosis Before Replacement

Do not replace injectors based on a single fault code. Confirm the failure:

1. Balance rates (Cummins Insite, Ford IDS, GM GDS2): Cylinder balance rate above ±4 mm³/stroke indicates a problem injector. Above ±6 means replace.
2. Cylinder contribution test: Shut down one injector at a time. RPM drop below 40 RPM on a running engine indicates weak contribution.
3. Borescope: Check for tip erosion, carbon buildup, or cracked nozzle.
4. Fuel sample: Dark fuel, algae, or metallic particles mean contamination — replace all injectors and the fuel system upstream.
5. Compression test: Low compression on one cylinder may mimic injector failure. Rule out mechanical issues first.

Diagnostic labor: $150–$250 at most shops. Worth every penny before ordering $3,000 in injectors.

Common Failure Causes

Cause	Symptoms	Collateral Damage	Total Repair Cost
Normal wear (200k+ mi)	Rough idle, white smoke, balance rate codes	Usually none	$600 – $5,000
Fuel contamination (water, algae)	Misfire, hard start, metallic rattle	All injectors + pump + lines	$3,000 – $12,000
CP4 pump failure (Powerstroke)	Metal in fuel, sudden stall	Pump, rails, lines, all 8 injectors	$5,000 – $10,000
Bad fuel (low lubricity)	Scored injector plunger	Pump + affected injectors	$2,000 – $8,000
Overheating	Tip erosion, cracked nozzle	Usually isolated to 1–2	$600 – $1,500
Electrical fault (wiring)	Single cylinder code, good balance rate	None — fix wiring	$150 – $400

Always cut open the old fuel filter and inspect for metal shimmer. If you see metal, stop and quote the full fuel system — not just the one injector that threw the code.

ISX15 Unit Pump Specifics

Pre-2017 ISX15 engines use high-pressure unit pumps (not common-rail injectors). Each pump is a self-contained unit bolted to the side of the engine.

• Part number: Cummins 4903472 (varies by serial)
• Labor per pump: 2.0–2.5 hours
• Must set injector height with adjustment shims during install
• Torque hold-down cap screws to spec per QuickServe (typically 59 ft-lbs)
• Replace all six if one pump sends metal downstream

Unit pump replacement cost per unit: $1,500–$2,500 installed (OEM). Full set: $8,000–$12,000.

Programming and Coding After Install

Some platforms require injector coding after replacement:

Engine	Coding Required?	Tool Needed
6.7L Cummins	Yes (IMA codes)	Insite, JPRO, or compatible
6.7L Powerstroke	Yes (injector trim codes)	Ford IDS/FDRS
6.6L Duramax L5P	Yes (injector codes)	GM GDS2/Tech 2
ISX15/X15	Yes (injector trim)	Cummins Insite
DD15	Yes (IMA/trim)	Detroit Diagnostic Link

Coding labor: $100–$200 if the shop has the tool. New injectors ship with coding data on a label or QR code. Enter the codes into the ECM so it can compensate for flow variation.

Labor Breakdown — What Takes the Time

On a 6.7L Cummins single injector:

Step	Time
Diagnosis and code verification	0.5 – 1.0 hr
Remove valve cover	0.3 hr
Depressurize fuel system	0.2 hr
R&R injector	0.5 – 0.8 hr
Reinstall valve cover (new gasket)	0.3 hr
Prime and test start	0.3 hr
Road test and verify balance rates	0.3 – 0.5 hr
Total	2.4 – 3.4 hrs

Full set on the same engine: 8–12 hours because you R&R all six at once but only remove the valve cover once. The per-injector labor drops significantly on a full set.

Preventing Repeat Failures

After injector replacement:

1. Install a 2-micron fuel filter water separator if not already equipped
2. Drain water separator at every fill-up
3. Buy fuel from high-volume stations (less water contamination)
4. Use fuel additive with lubricity enhancer (Stanadyne, Power Service) if running ULSD without lubricity spec
5. Change fuel filters at half the OEM interval for the first 10,000 miles post-repair
6. Run oil analysis at 3,000 miles to check for fuel dilution

On Powerstroke CP4 platforms, consider a CP3 conversion kit ($3,500–$5,500) during any fuel system repair to eliminate the failure mode.

FAQ

How much does it cost to replace one diesel injector?

$600–$900 on pickup platforms (Cummins, Powerstroke, Duramax). $1,500–$2,500 per unit on Class 8 common-rail or unit pump systems. Includes parts and labor.

Should I replace all injectors if one fails?

On common-rail systems, yes. Mismatched injector flow rates cause rough running and ECM compensation limits. On ISX15 unit pumps, replace all six if contamination is present. If it’s a single worn injector at 250,000+ miles with clean fuel history, some shops will replace just the failed unit — but balance rates must be verified after.

How long do diesel injectors last?

150,000–250,000 miles on well-maintained engines with clean fuel. CP4-related failures on Powerstrokes can happen as early as 80,000–120,000 miles. Class 8 engines with good PM often exceed 400,000 miles on original injectors.

Can I drive with a bad injector?

Short distances, yes — but you’ll get progressive damage. A leaking injector dumps fuel into the cylinder, washing off oil and scoring the cylinder wall. A stuck-closed injector causes lean combustion and high EGTs. Either direction leads to more expensive repairs if you keep driving.

What are the symptoms of a failing diesel injector?

Rough idle, white or blue exhaust smoke, fuel knock (rattle at idle), hard starting, loss of power, check engine light with cylinder-specific misfire codes, and raised balance rates on scan tool.

Is it cheaper to rebuild injectors?

Injector rebuilding ($150–$250 per unit at a specialty shop) is cheaper than new OEM but requires shipping injectors out and 3–5 day turnaround. Quality varies by rebuilder. For pickups, remanufactured exchange injectors are the better middle ground.

Does warranty cover injector replacement?

Powertrain warranty (5 yr/60,000 mi typical on pickups) may cover injector failure if not caused by fuel contamination or aftermarket modifications. Emissions warranty (8 yr/80,000 mi) covers some injector-related emissions faults. Document fuel purchase history for warranty claims.

How much does a CP4 failure cost on a Powerstroke?

$5,000–$10,000 for pump, rails, lines, and all eight injectors. A CP3 conversion kit adds $3,500–$5,500 but prevents repeat failure. Do not replace just the pump after a CP4 failure — the metal contamination destroys everything downstream.

Sources

• Mitchell1 ProDemand — per-injector R&R labor times for 6.7L Cummins, 6.7L Powerstroke, and Cummins ISX15
• Mopar, Ford, and GM OEM parts catalogs — injector unit pricing verified September 2026
• Bosch, Delphi, and Alliant Power distributor pricing — remanufactured and aftermarket injector costs
• Cummins QuickServe bulletin 4313245 — 6.7L Cummins injector hold-down torque and R&R procedure
• Cummins Insite parameter guides — balance rate specifications and injector trim coding requirements
• Detroit DiagnosticLink service information — DD15 common-rail injector IMA coding procedures

Related Reading

• Diesel injector replacement cost breakdown — platform-by-platform parts and labor totals for full-set replacements
• Step-by-step diesel injector replacement — R&R procedure, torque specs, and post-install coding for common-rail pickups
• Fuel filter service intervals — contamination prevention that extends injector life between replacements
• Diesel fuel system diagnostics — balance rates, return flow tests, and CP4 failure collateral damage
• Diagnosing a runaway diesel engine — mechanical failures that mimic injector fault codes