• Isuzu D-MAX – 4JJ1-TCX 3.0L 4-Cylinder Turbo Diesel | 2012–2020

✅ Engineered specifically for 2012–2020 D-MAX models with the 4JJ1-TCX engine

How It Works: Installed between the fuel tank and factory filter, the PreLine-Plus provides superior fuel system protection with 100% water separation efficiency. The integrated multi-stage in-cab water alarm alerts you immediately when water is detected—no manual checking required.

Key Features:

• 100% water separation efficiency — stops water before it reaches your injectors
• 98% particle removal — keeps the OEM filter focused on fine filtration
• Multi-stage in-cab water alarm — know immediately if water is present in your fuel
• Spin-on filter design — easy maintenance and fast replacement
• No bypass system — contaminants never reach your engine
• Protects against corrosion and abrasive wear
• Prevents injector and pump damage

💡 Why This Matters: The 4JJ1-TCX common rail system is highly sensitive to water contamination. With repair costs exceeding $10,000, the PreLine-Plus with integrated water alarm provides superior protection and automatic alerts—no guesswork, no manual checking. Just immediate notification when water is detected.

How It Works: The ProVent separates oil mist and blow-by gases before they enter your intake system. Clean air equals a clean engine—protecting your intake, intercooler, and turbo from oil contamination and carbon build-up.

Key Features:

• 98% oil separation efficiency
• Keeps intake, intercooler, and turbo clean
• Reduces soot and blow-by contamination
• Improves longevity of engine internals
• Minimizes oil consumption and emissions
• Regulates crankcase pressure
• Optimizes performance and reliability
• Prevents oil and soot entering clean air intake

💡 Why This Matters: Oil vapour causes carbon deposits that restrict airflow, foul sensors, and reduce power over time. The ProVent keeps your 4JJ1's intake system clean, protecting vital components and maintaining optimal performance for the long haul.

PreLine-Plus Pre-Filter System:

• Water Separation: 100% efficiency
• Particle Removal: 98% efficiency
• Filter Type: Spin-on replaceable element
• Integrated multi-stage water alarm: Visual + audible in-cab alert
• No bypass valve — full filtration always active
• Designed for 4JJ1-TCX fuel system specifications

ProVent Ultimate Catch Can:

• Oil Separation: 98% efficiency
• Filter: MANN+HUMMEL media
• Drain tap for oil collection
• Optional return line to sump
• Engineered specifically for 4JJ1 crankcase system
• Built to handle Australian conditions and terrain

PreLine-Plus Pre-Filter Kit:

• PreLine-Plus pre-filter assembly with spin-on filter
• Multi-stage in-cab water alarm module (visual + audible)
• D-MAX 4JJ1-specific mounting bracket
• Complete fuel line and fitting kit
• Wiring harness for alarm installation
• Hose clamps and connectors
• Mounting hardware
• Installation guide

ProVent Ultimate Catch Can Kit:

• MANN+HUMMEL ProVent catch can
• D-MAX 4JJ1-specific mounting bracket
• Complete hose and fitting kit
• Drain tap assembly with hose
• Optional sump return line components
• Mounting hardware (bolts, washers, nuts)
• Spring clamps and cable ties
• Installation guide

✅ Vehicle-specific components for fast and easy installation

Recommended: Competent qualified mechanic

Combined DIY Time: 4–5 hours (both systems)

PreLine-Plus Installation:

• Mounts in engine bay between fuel tank and OEM filter
• Uses 4JJ1-specific mounting bracket
• Water alarm module mounts in cab (dashboard or A-pillar)
• Wiring connects to cabin for visual/audible alerts
• Spin-on filter design for easy maintenance

ProVent Installation:

• Mounts in engine bay
• Connects to crankcase ventilation system
• Drain tap routed for easy access
• Optional return line to sump can be configured
• All hoses and fittings included

Important: Both systems can be installed separately or together. Detailed installation guides included with each kit for straightforward DIY or professional installation.

PreLine-Plus Pre-Filter:

• Water alarm will alert you automatically when water is detected
• Drain water when alarm sounds (simple drain procedure)
• Replace spin-on filter element per vehicle service schedule
• No manual checking required — alarm does the monitoring
• Fast filter changes thanks to spin-on design

ProVent Catch Can:

• Check oil level every 5,000–10,000 km
• Drain collected oil via drain tap when needed
• If using sump return line, oil automatically recirculates
• Replace filter element every 40,000 km (replacement elements available)

💡 Pro Tip: The integrated water alarm eliminates guesswork—when it sounds, simply drain the water in minutes. The spin-on filter design makes replacements quick and easy. Keep your 4JJ1 protected with minimal maintenance effort.

Q: Will this void my Isuzu warranty?

A: No. Aftermarket protection devices don't void warranty under Australian Consumer Law. These systems protect your engine without interfering with factory components.

Q: Does this fit 2012–2020 D-MAX models only?

A: Yes, this kit is specifically designed for 2012–2020 Isuzu D-MAX models with the 4JJ1-TCX 3.0L engine. For 2020+ models with the 4JJ3 engine, please see kit FMPV645DPK.

Q: Is the water alarm included or sold separately?

A: The multi-stage in-cab water alarm is included with this kit! It provides both visual and audible alerts when water is detected—no need to manually check the filter.

Q: How does the PreLine-Plus differ from the Fuel Manager?

A: The PreLine-Plus offers superior 100% water separation efficiency (vs 95%) and comes with an integrated water alarm system. It also features a convenient spin-on filter design for faster maintenance.

Q: How often do I need to drain water?

A: The water alarm will alert you automatically when water is detected. Simply drain when the alarm sounds—no scheduled checking required. Frequency depends on fuel quality and conditions.

Q: Can I install these systems myself?

A: If you're mechanically competent and comfortable working with fuel lines and basic wiring, yes. Most DIYers complete installation in 4-5 hours. Otherwise, any qualified mechanic can handle it. Detailed installation guides are included.

Q: Do I need both systems or can I buy them separately?

A: You can buy either system separately, but the combo kit offers better value and comprehensive protection. The PreLine-Plus protects your fuel system, while the ProVent protects your intake system—together they provide complete engine protection.

Q: Does the ProVent return oil to the sump automatically?

A: The kit includes components for an optional sump return line. You can configure it to either: (a) collect oil in the catch can for periodic draining, or (b) return clean oil back to the sump automatically. Your choice based on preference.

Q: Why is this protection important for the 4JJ1 engine?

A: The 4JJ1-TCX common rail system operates at extremely high pressures with tight tolerances. It's highly sensitive to water contamination and carbon build-up. This dual protection system is engineered specifically for Australian conditions where fuel quality can vary.

Q: Is this suitable for heavy-duty use and towing?

A: Absolutely. This kit is engineered for Australian conditions and terrain, including heavy-duty use, towing, touring, and off-road driving. The 100% water separation and 98% oil separation provide maximum protection under demanding conditions.

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