• 4JJ1 Rail Pressure Relief Valve - Isuzu - 8-98032549-0 - Common Rail Cowboys
  • 4JJ1 Rail Pressure Relief Valve - Isuzu - 8-98032549-0 - Common Rail Cowboys
  • 4JJ1 Rail Pressure Relief Valve - Isuzu - 8-98032549-0 - Common Rail Cowboys
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Denso

4JJ1 Rail Pressure Relief Valve - Isuzu - 8-98032549-0

4JJ1 Rail Pressure Relief Valve - Isuzu - 8-98032549-0

$329.00 NZD
$329.00 NZD
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Rail Pressure Relief Valve – Isuzu 4JJ1 – 8-98032549-0

 

Genuine Denso rail relief valve for common 4JJ1 applications

Genuine Isuzu / Denso mechanical rail pressure relief valve to suit various 4JJ1 platforms. Ideal replacement to restore stable rail pressure and help resolve intermittent limp/faults due to a sticking or leaking relief.

📦 What’s Included
  • 1 × Genuine Denso rail pressure relief valve (sealed)

Install to clean, lint-free standards. Torque to factory spec from the service manual.

🔢 Cross-References (Check Before Purchase)

Denso PNs:

  • 095420-0260
  • 095420-0280
  • 095420-0190

GM / Holden PN:

  • 98032549

Isuzu PNs:

  • 8-98032549-0
  • 8-97318691-0

Match by part number or send your VIN to confirm compatibility.

✅ Typical Vehicle Applications
  • Isuzu D-MAX / MU-X with 4JJ1
  • Holden Colorado / Rodeo with 4JJ1

Applications vary by year/trim. Always verify against your original part number.

🛠️ Why Replace the Relief Valve?
  • Helps resolve unstable rail pressure / intermittent limp conditions
  • Prevents hot-soak pressure bleed-down and hard-start symptoms
  • Restores ECU control of commanded rail pressure under load
💳 Payment & 🚚 Shipping
  • Afterpay, Humm, Klarna & Zip available
  • Free Express Shipping Australia-Wide — fast, trackable dispatch

❓ FAQs

Will this fit my 4JJ1 D-MAX / Colorado?

If your original valve matches one of the listed Denso/Isuzu/GM part numbers, this is the correct replacement. When in doubt, share your VIN.

Do I need tuning after replacement?

No tuning required. This is a like-for-like OEM-spec part. Clear any stored faults after installation.

Is this new or reconditioned?

Brand new Genuine Isuzu / Denso valve, sealed in original packaging.

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