Isuzu NQR

Power steering fluid capacity & service interval

Isuzu NQR power steering fluid capacity ranges from 1 to 1,6 liters. Service intervals include checking every 10000 km or 6 months, checking every 10000 km or 18 months, and changing every 40000 km or 24 months. The data covers 4 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
NQR 70 (1998-2007)
  • Use: Normal
  • Capacity 1,6 liter
  • Check 10000 km/ 6 months
  • Change 40000 km/ 24 months
NQR 70 (1998-2007)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 km/ 18 months
NQR 66 (1996-2007)
  • Use: Normal
  • Capacity 1,6 liter
  • Check 10000 km/ 6 months
  • Change 40000 km/ 24 months
NQR 66 (1996-2007)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 km/ 18 months

Additional Notes

  • The Isuzu NQR power steering system holds 1.6 liters of fluid across both the NQR 66 and NQR 70 configurations, a capacity typical of a rack-and-pump circuit in medium-duty truck applications.
  • The steering box on both the NQR 66 and NQR 70 holds 1 liter, a separate and smaller reservoir from the power steering pump circuit, reflecting a recirculating-ball steering box design common to trucks of this class.
  • The NQR 66 power steering fluid carries a check interval of every 10,000 km or 6 months under normal use conditions, whichever comes first, indicating a relatively frequent inspection cycle relative to the change interval.
  • The power steering fluid change interval for the NQR 66 is set at 40,000 km or 24 months under normal use conditions, meaning a full drain and refill of the 1.6-liter system is due at that threshold.
  • The NQR 70, introduced from 1998, shares the same 1.6-liter power steering capacity and identical check and change intervals as the NQR 66, with checks at 10,000 km or 6 months and changes at 40,000 km or 24 months under normal use conditions.
  • The steering box on both variants specifies only a check interval of 10,000 km or 18 months under normal use conditions, with no fluid change interval listed alongside the 1-liter capacity figure.
  • The 18-month time-based check interval for the steering box fluid is notably longer than the 6-month interval applied to the power steering pump circuit, reflecting a difference in fluid exposure and operating stress between the two sub-systems.
  • The NQR 66 coverage begins in 1996, while the NQR 70 coverage begins in 1998, meaning the NQR 66 predates the NQR 70 by two model years within the same specification range.

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