| Engine oil & filter | 0W-20 full synthetic · ≈6.6 US qt with filter (Trail4R; Toyota-Club lists 6.2 L) | Toyota: 10,000 mi; Trail4R's authors run 5,000 mi | Cartridge filter in a plastic housing behind the front skid: drain the housing with the plastic tool in the filter box, fresh O-rings, 64 mm cap wrench, and line the metal tab back up. Don't over-tighten; use genuine housings.Oil filters (1GR-FE cartridge) · RockAuto ↗Oil filter housing caps · RockAuto ↗ |
| Engine air filter | Panel filter | Check at every oil change | Replace when moderate dirt is visible (Trail4R).Engine air filters · RockAuto ↗ |
| Cabin air filter | Behind the glovebox | At least yearly | First suspect for a musty interior smell.Cabin air filters · RockAuto ↗ |
| Spark plugs | Iridium long-life · part number and interval confirm in manual | Replace if past the scheduled interval or undocumented | Pull and read the old plugs — they tell you how the engine has been running.Spark plugs · RockAuto ↗ |
| Coolant | Toyota Super Long Life Coolant (pink, pre-mixed) · 10.5 L (Toyota-Club) | Drain and refill if over 100,000 mi or undocumented; interval confirm in manual | Pre-mixed — don't dilute.Toyota Super Long Life Coolant, pre-mixed (Toyota 00272-SLLC2) · ToyotaPartsDeal (Toyota OEM) ↗ |
| Automatic transmission (5-speed A750) | Toyota ATF WS · 10.7 L total; a drain and fill swaps ≈5 qt | Drain and fill now if undocumented | No dipstick: the level is set through the 5 mm Allen check plug at 104–113 °F in maintenance mode (see the repair card). A filter-and-pan job is a good baseline on a truck with no records.Toyota ATF WS (Toyota 00289-ATFWS) · ToyotaPartsDeal (Toyota OEM) ↗Transmission strainer/filter (Toyota 35330-60050) · ToyotaPartsDeal (Toyota OEM) ↗Oil pan gasket (Toyota 35168-60010) · ToyotaPartsDeal (Toyota OEM) ↗ |
| Transfer case | Toyota Transfer Gear Oil LF 75W · ≈1.1 US qt (part-time) / 1.5 qt (full-time) | Toyota: 30,000 mi on dirty or dusty roads; Trail4R does all driveline fluids every 30,000 | 24 mm plugs, 27 ft-lb. Don't swap with diff oil; Red Line MT-LV is the aftermarket alternative cited.Toyota Transfer Gear Oil LF (1 L) (Toyota 00279-DGOLF) · ToyotaPartsDeal (Toyota OEM) ↗Transfer case drain/fill gasket (superseded by 90430-18008) (Toyota 90430-A0003) · ToyotaPartsDeal (Toyota OEM) ↗ |
| Front & rear differentials | Toyota Differential Gear Oil LT 75W-85 GL-5 · front ≈1.6 qt (part-time) / 1.5 qt (full-time) · rear ≈2.65–2.75 L / 2.8–2.9 qt (Trail4R and Toyota-Club disagree on which version holds more) confirm in manual | Toyota: 15,000 mi when heavily loaded or with roof gear | Fill plug first. Front uses 10 mm hex plugs (48/29 ft-lb); rear 24 mm (36 ft-lb).Toyota Differential Gear Oil LT 75W-85 (qt) (Toyota 00279-DGOLT-01) · ToyotaPartsDeal (Toyota OEM) ↗Crush washer — front fill, rear drain & fill (Toyota 12157-10010) · ToyotaPartsDeal (Toyota OEM) ↗Crush washer — front diff drain (Toyota 90430-24017) · ToyotaPartsDeal (Toyota OEM) ↗ |
| Power steering fluid | ATF Dexron II/III (Toyota-Club) | Check level and colour | Hydraulic rack on the 5th gen.Power steering fluid · RockAuto ↗ |
| Brake fluid | DOT 3 | Toyota: every 2 years or 60,000 mi (per Trail4R) | Rear bleeds use the ABS pump with the ignition on and the pedal weighted — don't run it more than 100 seconds at a time. Bleeders 8 ft-lb.Brake fluid · RockAuto ↗ |
| Propshaft grease points | NLGI No. 2 lithium grease · six zerks on 4x4 trucks | Every 5,000 mi on dirt/dusty roads or when towing (Toyota schedule via Trail4R) | Spider joints until fresh grease shows at all four caps; only a few pumps on the slip yokes.Universal joints · RockAuto ↗ |
| Serpentine belt | Toyota 90916-A2015 | Toyota: inspect at 63,000 mi, then every 18,000 mi | Spin the idler and tensioner pulleys by hand while the belt is off. The 1GR-FE uses a timing chain with no service interval.Serpentine belt (Toyota 90916-A2015) · ToyotaPartsDeal (Toyota OEM) ↗ |
| PCV valve | Threads into the driver-side rear of the engine · 19 mm deep socket · Threebond 1324 · 20 ft-lb | No Toyota interval; Trail4R's author replaced his at 60,000 mi | If the ball inside doesn't rattle, it's stuck. |
| Battery | Group 34 fits (Trail4R used an Odyssey) | Load-test now | Switch any accessory that doesn't need constant power to avoid parasitic drain.Batteries · RockAuto ↗ |