HyundaiTucson FCEV2015Overview/hyundai/tucson-fcev/2015/base/

2015 Hyundai Tucson FCEV

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2015 Tucson FCEV.

Body SUV

The 2015 Hyundai Tucson FCEV is a compact SUV that calls for 5.0 quarts of engine oil, with a flexible viscosity range spanning 5W-20, 10W-30, and 5W-30 API grades. This model year accumulated 224 owner complaints, the majority centered on the engine, alongside a single recall, situating it as a notably problematic entry in the Tucson's reliability record and underscoring significant powertrain vulnerabilities for researchers to consider.

Model year201720162015

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity5.0 qtOEM · verified
Engine oil type5W-20 / 10W-30 / 5W-30 APIOEM · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 121R · 600 CCA battery. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 121R · 600 CCAOEM · verified
Tire sizeP225/60R17OEM · verified
Wheel / rim6.5 inOEM · verified

OE service part numbers OEM · verified

Battery371102E100

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length173.2 in
Overall width71.7 in
Overall height65.4 in
Wheelbase103.9 in
Curb weight3371 lb
Track (front / rear)62.2 / 62.2 in
Weight distribution (front / rear)59/41

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 5.0 qt of 5W-20 / 10W-30 / 5W-30 API engine oil, 75W-90 · GL-5 in the differential, DOT 3 · DOT 4 brake fluid. Torque the oil drain plug to 25.3-32.5 ft-lbs. The firing order is 1-3-4-2. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Lubricants & capacities

Automatic Transmission FluidATF
Automatic Transmission Fluid Capacity7.5
Brake FluidDOT 3 · DOT 4
Differential Gear Oil75W-90 · GL-5
Differential Gear Oil Capacity1.1 qt
Engine CoolantEthylene Glycol
Engine Coolant Capacity7.1
Engine CoolantEthylene Glycol

Engine torques

Crankshaft Pulley and/or Damper Bolts145-152 ft-lbs
Crankshaft Pulley and/or Damper Bolts123-130 ft-lbs
Intake Manifold to Engine Bolts14
Exhaust Manifold to Cylinder Head Bolts36-40 ft/lbs.
Intake Manifold to Engine Bolts14
Exhaust Manifold to Cylinder Head Bolts36
Engine Oil Pan Drain Plug25.3-32.5 ft-lbs

Chassis torques

Driveshaft Flange to Transmission36.1-50.6 ft-lbs
Transfer Case Fill Plug29.0-43.0 ft-lbs
Transfer Case Drain Plug29.0-43.0 ft-lbs
Front Wheel Hub217-231 ft-lbs
Rear Wheel Hub203-217 ft-lbs
Front Wheel Hub145-203 ft-lbs

Ignition

Cylinder Firing Order1-3-4-2
Ignition Coil Primary Resistance0.56-0.68 ohms
Ignition Coil Secondary Resistance5950-8050 ohms
Ignition Coil Primary Resistance0.56-0.68 ohms
Ignition Coil Secondary Resistance5950-8050 ohms
Spark Plug ManufacturerHyundai
Spark Plug Gap.031 - .035 in
Spark Plug Torque11 - 18 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity18.56-20.32 lbs
Oil GroupPAG
Oil Type46
Oil Capacity3.72-4.40 oz
Standard BCI Group Number121R
Standard BCI Cranking Performance600 cca

Service checks

Regulated Fuel System Pressure (With Vacuum)72-73 psi
Engine Compression171 - 192 psi / Maximum Variation 15 psi
Engine Compressionpsi 171-192 / Max Variation 15 psi
Intake Valve Lash0.0067-0.0009 in
Exhaust Valve Lash0.0105-0.0130 in

Brakes

Brake Caliper Bolt to Carrier TorqueFront or rear: 16-23 / 16-23
Brake Caliper Carrier to Hub Bolt TorqueFront: 58-; Rear: 36-; Front: 58-; Rear: 36-
ABS Sensor Torque6.0-7.0 / NS
Minimum Pad ThicknessFront: 0.079; Rear: 0.079 in
Minimum Shoe Thickness0.039 in
Vented Rotor Minimum Thickness for ReplacementFront: 1.040; Rear: .330
Variation from Parallelism Thickness Variation.0002
Maximum Rotor RunoutFront: .0016; Rear: .002

Multi-step torque procedures OEM · verified

Connecting Rod (Large End) Bearings — tightening sequence 1 stages
113.0-16.0 ft. lbs., Step 2: 9013–16 ft. lbs
Connecting Rod (Large End) Bearings — tightening sequence 1 stages
113.0-16.0 ft. lbs., Step 2: 8013–16 ft. lbs
Cylinder Head — tightening sequence 3 stages

Prep Do not reuse old bolts. Do not allow oil on cylinder head bolts. Apply Loctite 5900H or equivalent on the front edge of the cylinder head gasket. Both the upside and the down side. Assembly of the cylinder head must be completed within five minutes of applying the liquid gasket compound.

124.0-27.0 ft. lbs.24–27 ft. lbs
290 degrees-95 degrees90 degrees
390 degrees-95 degrees90 degrees
Cylinder Head — tightening sequence 3 stages

Prep Do not reuse old bolts. Do not allow oil on cylinder head bolts. Apply Loctite 5900H or equivalent on the front edge of the cylinder head gasket. Both the upside and the down side. Assembly of the cylinder head must be completed within five minutes of applying the liquid gasket compound.

124.0-27.0 ft. lbs.24–27 ft. lbs
290 degrees-95 degrees90 degrees
390 degrees-95 degrees90 degrees
Main Bearings — tightening sequence 1 stages
111.0 ft. lbs., Step 2: 22.0 ft. lbs., Step 3: 122.511 ft. lbs
Main Bearings — tightening sequence 1 stages
111.0 ft. lbs., Step 2: 20.0-23.0 ft. lbs., Step 3: 122.511 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 7,500 mi; spark plugs at 105,000 mi; coolant every 30,000 mi. The big-interval services (every 30,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 7,500 miEngine Oil (drain & refill) · Engine Oil Filter (replace) · Fuel Tank (add fluid conditioner) · Tire & Wheel Assembly (rotate) · Vacuum Line (inspect)
Every 15,000 miAccessory Drive Belt (inspect) · Air Conditioning System (inspect) · Brake Line (inspect) · Brake Linings (inspect) · Brake Rotor (inspect) · CV Joint Boot (inspect)
Every 30,000 miBrake Hydraulic System (inspect fluid level) · Engine Air Filter Element (replace) · Engine Coolant System (drain, flush & refill) · Fuel Evaporative Canister Filter (inspect) · Fuel Evaporative Emission Control System Lines (inspect) · Fuel Filter (inspect)
Every 37,500 miDifferential (inspect fluid level) · Transfer Case Assembly (inspect fluid level)
At 60,000 miAccessory Drive Belt (inspect)
Every 60,000 miEngine Valves (inspect valve lash)
At 105,000 miSpark Plugs (replace)
At 120,000 miEngine Coolant System (drain, flush & refill)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

Owner complaints about the 2015 Hyundai Tucson FCEV dominate in one area — the engine, 76 of 224 reports (34%), well ahead of the next concern. None of this vehicle's 1 recall campaigns target the engine, so those reports read as owner-reported wear-and-tear rather than an acknowledged defect. 7 of the reports describe a crash and 8 a fire — a small share of the total, but worth weighing against the engine pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.

1
Open recalls
NHTSA campaigns
172
Service bulletins
Manufacturer communications
2
ODI investigations
Office of Defects Investigation
224
Owner complaints
7 involved a crash · 8 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Overall★★★★
Frontal★★★★
Side★★★★★
Rollover★★★★

Owner complaints filed with NHTSA, by component

All 224 complaints on record, top 8 components.

Engine76
Service Brakes, Hydraulic48
Unknown Or Other11
Power Train,Engine6
Unknown Or Other,Engine6
Engine,Fuel/Propulsion System4
Service Brakes4
Service Brakes, Hydraulic,Engine3

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

22V056000Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip:Control Unit/ModuleReported 03/02/2022

Hyundai Motor America (Hyundai) is recalling certain 2016-2018 Santa Fe, 2017-2018 Santa Fe Sport, 2019 Santa Fe XL, and 2014-2015 Tucson vehicles. The Anti-Lock Brake System (ABS) module could malfunction and cause an… Remedy: Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will replace the ABS multi-fuse, as necessary, free of charge. Owner…

Technical service bulletins NHTSA · verified

Showing 5 of 172 bulletins on record with NHTSA.

BulletinDateComponentSummary
DTN DL2026-04-10Air BagsThe National Highway Traffic Safety Administration (NHTSA) has identified the presence of…
DTN DCS2026-04-10Air BagsThe National Highway Traffic Safety Administration (NHTSA) has issued an urgent safety…
26-01-033H TSB2026-03-26EngineThis TSB references the Op codes to use for claim submission and the Parts required based…
26-01-033H DN2026-03-26EngineThis TSB references the Op codes to use for claim submission and the Parts required based…
P33 OL2025-12-19Electrical SystemIn response to this trend, we engineered a software upgrade that addresses the social…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific Tucson FCEV. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Reference guides

Cross-vehicle references for the kinds of data on this page.

Frequently asked

How much oil does the 2015 Tucson FCEV take?

5.0 qt of 5W-20 API certification, SL or SM-is preferred. Above 0 degreesF 10W-30 API certification, SL or SM, All temperatures 5W-20 or 5W-30 API certification, SL or SM, per the factory manual.

Does the 2015 Tucson FCEV have open recalls?

NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.