The 2016 Toyota Highlander belongs to the 3rd generation (XU50) (2014-2019), built with 2.7L I4 (1AR-FE, LE FWD base trim) with a 6-speed automatic; 3.5L V6 (2GR-FE through 2016, then direct-injection 2GR-FKS from 2017) with a 6-speed automatic (2014-2016) or new 8-speed Direct Shift automatic (2017-2019); 3.5L V6 Hybrid (2GR-FXE) with a hybrid transaxle. It takes 0W-20 full synthetic across every engine. Oil changes run 10,000 miles or 12 months normal duty; 5,000 miles under severe duty. This sits in the middle of the generation run, generally the most sorted point in a design before end-of-run cost reductions.
A 2016 Toyota Highlander is 10 years old in 2026, which at an average 12,000 miles a year puts it around 120,000 miles - high mileage. Near 120,000 miles a vehicle is typically well into its second or third round of scheduled service, and unscheduled repairs start to outnumber routine maintenance. A written history is what tells you whether an item is due or already done. On that mileage estimate it is already past its 120,000-mile service, which its own schedule lists as: Replace all 4 spark plugs - a single interval for this engine every year it was offered, Replace all 6 spark plugs - the 2GR-FKS (2017-2022) also gets the additional 60,000 mi interval above; the earlier 2GR-FE (2014-2016) does not, Replace all 6 spark plugs - 2017-2019 also gets the additional 60,000 mi interval above; 2014-2016 does not, Replace cabin air filter, Replace engine air filter, Inspect rear differential fluid for signs of leakage - no fixed replacement under normal duty, Inspect transfer case fluid for signs of leakage - no fixed replacement under normal duty. The next milestone on its own schedule is 150,000 miles, roughly 2.5 years away at average use - a repeat of the 30,000-mile service.
The fault most worth knowing about on this generation is Direct-injection carbon buildup on intake valves is specific to the 2017-2019 2GR-FKS/2GR-FXE, not the earlier port-injected 2GR-FE. Owners also report Early 8-speed (UA80) units from the 2017 introduction drew some hesitation/rough-shift complaints before software updates matured; and 2014-2015 Highlander Hybrid maintenance specifics rest on the unchanged 2016 Hybrid guide rather than a year-specific document - see SOURCES. None of these are certainties on any individual vehicle - they are the patterns worth checking for when you buy or when a symptom appears.
Track your 2016 Toyota Highlander service history free with the ServiceSage maintenance tracker.
| Interval | Service |
|---|---|
| Every 5,000 mi | Tire rotation, Inspect brake linings/drums and pads/discs, Inspect and adjust all fluid levels, Inspect wiper blades |
| Every 10,000 mi / 12 months | Engine oil & filter change (0W-20 V6/Turbo or 0W-16 Hybrid), Tire rotation, Inspect brakes and fluid levels |
| Every 15,000 mi | Inspect cabin air filter, Inspect ball joints and dust covers, Inspect brake lines and hoses, Inspect drive shaft boots, Inspect engine coolant, Inspect steering gear and linkage, Inspect rear differential and transfer case fluid (AWD) |
| Every 30,000 mi | Replace cabin air filter, Replace engine air filter, Inspect automatic transmission for signs of leakage (all engines, including the Hybrid transaxle - no fixed replacement under normal duty) |
| Every 30,000 mi (AWD models, normal duty) | Inspect rear differential fluid for signs of leakage - no fixed replacement under normal duty, Inspect transfer case fluid for signs of leakage - no fixed replacement under normal duty |
| Every 30,000 mi (AWD models, severe duty: towing) | Replace rear differential fluid, Replace transfer case fluid |
| Every 60,000 mi | Replace cabin air filter, Replace engine air filter |
| Every 60,000 mi (AWD models, normal duty) | Inspect rear differential fluid for signs of leakage - no fixed replacement under normal duty, Inspect transfer case fluid for signs of leakage - no fixed replacement under normal duty |
| Every 60,000 mi (severe duty: towing) - Hybrid transaxle | Replace automatic transmission fluid (Toyota Genuine ATF WS) - the Hybrid transaxle is inspect-only under normal duty; this replacement is specified only for towing, car-top-carrier, or heavy-vehicle-loading use. Confirmed directly on the 2019, 2022 and 2023 Hybrid guides; 2014-2015 follow the same 2016-guide carryover as the rest of this file's early Hybrid data |
| Every 100,000 mi (coolant) | Replace engine coolant (Toyota Super Long Life, pink) - first replacement; every 50,000 mi thereafter |
| Every 120,000 mi (2.7L I4 1AR-FE spark plugs) | Replace all 4 spark plugs - a single interval for this engine every year it was offered |
| Every 120,000 mi (3.5L V6 spark plugs - 2GR-FE 2014-2016 or 2GR-FKS 2017-2022) | Replace all 6 spark plugs - the 2GR-FKS (2017-2022) also gets the additional 60,000 mi interval above; the earlier 2GR-FE (2014-2016) does not |
| Every 120,000 mi (3.5L V6 Hybrid 2GR-FXE spark plugs) | Replace all 6 spark plugs - 2017-2019 also gets the additional 60,000 mi interval above; 2014-2016 does not |
| Every 120,000 mi | Replace cabin air filter, Replace engine air filter |
| Every 120,000 mi (AWD models, normal duty) | Inspect rear differential fluid for signs of leakage - no fixed replacement under normal duty, Inspect transfer case fluid for signs of leakage - no fixed replacement under normal duty |
The table above is indexed by service interval. This is the same schedule indexed by odometer reading, for when you know your mileage and want the list. If your odometer sits between these figures, work back to the last one you passed and catch up anything skipped.
| Odometer | Service due |
|---|---|
| 30,000 mi (48,000 km) | Tire rotation, Inspect brake linings/drums and pads/discs, Inspect and adjust all fluid levels, Inspect wiper blades, Engine oil & filter change (0W-20 V6/Turbo or 0W-16 Hybrid), Inspect brakes and fluid levels, Inspect cabin air filter, Inspect ball joints and dust covers, Inspect brake lines and hoses, Inspect drive shaft boots, Inspect engine coolant, Inspect steering gear and linkage, Inspect rear differential and transfer case fluid (AWD), Replace cabin air filter, Replace engine air filter, Inspect automatic transmission for signs of leakage (all engines, including the Hybrid transaxle - no fixed replacement under normal duty), Inspect rear differential fluid for signs of leakage - no fixed replacement under normal duty, Inspect transfer case fluid for signs of leakage - no fixed replacement under normal duty. |
| 60,000 mi (97,000 km) | Tire rotation, Inspect brake linings/drums and pads/discs, Inspect and adjust all fluid levels, Inspect wiper blades, Engine oil & filter change (0W-20 V6/Turbo or 0W-16 Hybrid), Inspect brakes and fluid levels, Inspect cabin air filter, Inspect ball joints and dust covers, Inspect brake lines and hoses, Inspect drive shaft boots, Inspect engine coolant, Inspect steering gear and linkage, Inspect rear differential and transfer case fluid (AWD), Replace cabin air filter, Replace engine air filter, Inspect automatic transmission for signs of leakage (all engines, including the Hybrid transaxle - no fixed replacement under normal duty), Inspect rear differential fluid for signs of leakage - no fixed replacement under normal duty, Inspect transfer case fluid for signs of leakage - no fixed replacement under normal duty. |
| 90,000 mi (145,000 km) | Same as the 30,000 mi service. |
| 100,000 mi (161,000 km) | Tire rotation, Inspect brake linings/drums and pads/discs, Inspect and adjust all fluid levels, Inspect wiper blades, Engine oil & filter change (0W-20 V6/Turbo or 0W-16 Hybrid), Inspect brakes and fluid levels, Replace engine coolant (Toyota Super Long Life, pink) - first replacement; every 50,000 mi thereafter. The every-15,000 mi service runs on its own cycle - the nearest fall at 90,000 and 105,000 miles. |
| 120,000 mi (193,000 km) | Tire rotation, Inspect brake linings/drums and pads/discs, Inspect and adjust all fluid levels, Inspect wiper blades, Engine oil & filter change (0W-20 V6/Turbo or 0W-16 Hybrid), Inspect brakes and fluid levels, Inspect cabin air filter, Inspect ball joints and dust covers, Inspect brake lines and hoses, Inspect drive shaft boots, Inspect engine coolant, Inspect steering gear and linkage, Inspect rear differential and transfer case fluid (AWD), Replace cabin air filter, Replace engine air filter, Inspect automatic transmission for signs of leakage (all engines, including the Hybrid transaxle - no fixed replacement under normal duty), Inspect rear differential fluid for signs of leakage - no fixed replacement under normal duty, Inspect transfer case fluid for signs of leakage - no fixed replacement under normal duty, Replace all 4 spark plugs - a single interval for this engine every year it was offered, Replace all 6 spark plugs - the 2GR-FKS (2017-2022) also gets the additional 60,000 mi interval above; the earlier 2GR-FE (2014-2016) does not, Replace all 6 spark plugs - 2017-2019 also gets the additional 60,000 mi interval above; 2014-2016 does not. |
| 150,000 mi (241,000 km) | Same as the 30,000 mi service. |
| 200,000 mi (322,000 km) | Same as the 100,000 mi service. The every-15,000 mi service runs on its own cycle - the nearest fall at 195,000 and 210,000 miles. |
| Part | Fitment note | Buy |
|---|---|---|
| Mobil 1 0W-20 Full Synthetic (5 qt) | 3.5L V6 and 2.4L Turbo spec | Check price on Amazon |
| Valvoline Advanced Full Synthetic 0W-16 (5 qt) | 2.5L Hybrid spec, 2020+ | Check price on Amazon |
| Toyota Genuine ATF WS Transmission Fluid (1 qt) | For the 6-speed U760E and 8-speed UA80 automatics, AND the Hybrid transaxle - do not substitute generic ATF | Check price on Amazon |
| Toyota Super Long Life Coolant Pink (1 gal) | Toyota pink SLLC - do not mix with green or orange coolant | Check price on Amazon |
| Toyota Genuine Iridium Spark Plugs for Highlander V6 | 2GR-FE/2GR-FKS 6-cylinder set | Check price on Amazon |
| Toyota Highlander Cabin Air Filter | Replace every 30,000 mi per the T-MMS chart | Check price on Amazon |
| Toyota Highlander Engine Air Filter | Replace every 30,000 mi per the T-MMS chart | Check price on Amazon |
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| Fastener | Torque | Size |
|---|---|---|
| Lug nut | 76 ft-lbs (103 Nm) | 21mm |
| Oil drain plug | 30 ft-lbs (40 Nm) | 14mm |
| Spark plug | 18 ft-lbs (25 Nm) | 5/8in |
Maintenance keeps these away, but when the dash does light up these are the codes this vehicle throws most often - each with what it means and what the repair actually costs.