Parts for your 2006 Nissan Navara-Steering rack

2006 Nissan Navara steering rack — fitted, what it does, and how to look after it

The 2006 Nissan Navara (D40) is fitted with a hydraulic rack-and-pinion steering rack. This isn’t a steering-box setup like the earlier D22, it’s a true rack assembly with inner and outer tie rods. This is confirmed in the Nissan Navara D40/R51 Electronic Service Manual (ST – Steering System, Steering Gear & Linkage) and widely documented in workshop guides such as Haynes for Navara/Pathfinder 2005–2014, plus AU/NZ parts catalogues listing complete power steering rack assemblies for the D40 platform.

On a 2006 Navara, the steering rack’s job is to turn the driver’s input into precise movement at the front wheels. The pinion on the steering column drives a toothed rack, pushing the tie rods left or right. Hydraulic assist reduces effort, so even with a load in the tray or on rough country roads, it feels direct and predictable. That’s why keeping the rack, its boots, bushes and tie rods in good nick matters for safety, tyre life, and a decent road feel.

As part of regular servicing, it’s worth giving the rack a once-over. Look for dampness around the pinion input seal and at the ends under the bellows boots — any red or amber fluid there suggests a seal leak. Check the rack boots for splits, the rack mounting bushes for softness or cracking, and the inner/outer tie rods for play. If there’s clunking over bumps, vague steering, a pull under throttle, or uneven tyre wear, the rack or tie rods could be due for attention.

If replacement is on the cards, a quality new or reconditioned rack is the go. It’s smart to replace outer tie rod ends and rack boots at the same time, then get a proper wheel alignment. Flush the system to clear contaminated fluid, fit new O-rings on the pressure and return lines, and refill with the specified Nissan-approved power steering fluid. After installation, bleed the system by turning lock-to-lock with the front wheels off the ground until air is purged and the fluid runs clear without foaming. Avoid holding full lock for more than a couple of seconds — it spikes pressure and can cook seals.

For utes that see corrugations, beach work or towing, more frequent inspections make sense. Catching a weepy seal or a cracked boot early is heaps cheaper than a full rack and pump job later.

Does a 2006 Navara have a steering rack or a steering box?

It has a hydraulic rack-and-pinion steering rack. The D40 platform (including 2006 models) uses a rack assembly, while the older D22 uses a recirculating-ball steering box. This is outlined in the Nissan D40 Service Manual’s steering section and common workshop manuals for the era.

What are the common signs the Navara’s steering rack is worn?

Tell-tales include power steering fluid leaks at the rack ends or pinion input, torn rack boots, free play or knock through the wheel, heavy or notchy steering, and uneven tyre wear. If those show up, have the rack, inner/outer tie rods, and rack bushes checked.

What fluid should be used and how is the system bled after rack replacement?

Use the power steering fluid specified by Nissan for the D40 (check the owner’s or service manual). After installation, top up, raise the front wheels, and slowly turn lock-to-lock to purge air, topping fluid as needed. Once bubbles are gone, lower the ute, recheck the level, and confirm there’s no foaming or noise.