Porsche718 Boxster2018Overview/porsche/718-boxster/2018/base/

2018 Porsche 718 Boxster

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2018 718 Boxster.

Body PASSENGER CAR

The 2018 Porsche 718 Boxster is classified as a passenger car and specifies a 6.0-quart engine oil capacity, a concrete service specification that defines its mechanical baseline. It falls squarely within the model’s 20172023 complaint-history window, a span whose highest recorded complaint count was three in 2017 and whose lowest was one in 2023. That positioning places the 2018 model year inside a generation that never exceeded three complaints in any tracked year, marking it as a low-incidence period in the line’s documented history.

Model year202520242023202220212020201920182017

Quick specs

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

Engine oil capacity6.0 qtOEM · verified
Lug nut torque118 ft-lbsOEM · verified

Fitment & sizes

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

From the factory this vehicle uses OE oil filter 99970768540. 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.

Tire size235/35ZR18; Rear: 265/45ZR18OEM · verified
Wheel / rim8.0-J; Rear: 9.5-J inOEM · verified

OE service part numbers OEM · verified

Engine oil filter99970768540 alt 9A210747500
Engine air filter982129620B
Spark plug0PB905612 alt 9A790560600
Battery992915105B alt 9A7915089
Front wiper blades99162890101
Serpentine belt9A210222500 alt 9A210222400
Thermostat0PB121110A alt 0PB121688
Cabin air filter9P1819631 alt 99157237100

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length172.4 in
Overall width70.9 in
Overall height50.4 in
Wheelbase97.6 in
Curb weight2943 lb
Track (front / rear)59.8 / 61.4 in
Weight distribution (front / rear)46/54

Performance & power Independent road tests

0–60 mph, quarter-mile, horsepower and torque from independent road tests.

Independent road tests for the 718 Boxster of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.

3.6–3.7 sec0–60 mph (tested)quickest 3.60 sec — 2018 GTS Convertible
YearTrim / engine0–60¼ mileHPDrivetrain
2018GTS Convertible 2.5L Turbo F-43.60 sec11.90 sec365 hpRWD
2018GTS Convertible 2.5L Turbo F-43.70 sec12.20 sec365 hpRWD
2017S Convertible 2.5L Turbo F-43.60 sec11.90 sec350 hpRWD
2017S Convertible 2.5L Turbo F-43.70 sec12.20 sec350 hpRWD
2017Convertible 2.0L Turbo F-44.00 sec12.50 sec300 hpRWD
2017S Convertible 2.5L Turbo F-44.30 sec12.60 sec350 hpRWD
2017S Convertible 2.5L Turbo F-44.30 sec12.60 sec350 hpRWD
2017S Convertible 2.5L Turbo F-44.30 sec12.70 sec350 hpRWD

Service quick specs OEM factory data

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

This engine 75W-90 · GL-5 in the differential. Torque lug nuts to 118 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 FluidMobilelube PTX formula A
Differential Gear Oil75W-90 · GL-5
Differential Gear Oil Capacity1.7 qt
Engine CoolantFilled with Porsche Life Long Coolant
Engine OilUse genuine Porsche A40 lubricant
Engine Oil Capacity6.0 qt
Manual Transmission FluidUse Porsche part number 00004320419

Engine torques

Intake Manifold to Engine Bolts7.3 ft-lbs

Chassis torques

Lug Nuts118 ft-lbs
Lug Nuts118 ft-lbs

Ignition

Cylinder Firing Order1-3-4-2
Spark Plug ManufacturerPorsche
Spark Plug Torque16 ft-lbs

Battery & A/C

RefrigerantR1234yf
Refrigerant Capacity1.84 lbs
Oil TypeSPA2
Oil Capacity3.38 oz
RefrigerantR1234yf
Refrigerant Capacity1.84 lbs.
Oil TypeSP-A2
Oil Capacity3.38 oz

Service checks

Fuel Pump Pressure Minimum84.0
Fuel Pump Pressure Maximum90.0
Fuel Pump Pressure Minimum84.0
Fuel Pump Pressure Maximum90.0

Brakes

Brake Caliper Carrier to Hub Bolt Torque63 replace screws.
Brake Caliper Carrier to Hub Bolt Torque63 replace screws.
Vented Rotor Minimum Thickness for ReplacementFront: 1.024; Rear: .709
Vented Rotor Minimum Thickness after RefinishFront: 1.047; Rear: .732
Variation from Parallelism Thickness Variation.0008
Maximum Rotor Runout.001 off vehicle. .004 mounted on vehicle.
Maximum Drum DiameterParking Brake: 7.126
Vented Rotor Minimum Thickness for ReplacementFront: 1.024; Rear: .709

Multi-step torque procedures OEM · verified

Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
12.0 ft. lbs., Step 2: 6.0 ft. lbs., Step 3: 76.5 degrees-85.52 ft. lbs
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
12.0 ft. lbs., Step 2: 6.0 ft. lbs., Step 3: 76.5 degrees-85.52 ft. lbs
Cylinder Head — tightening sequence 9 stages

Prep Use new bolts coated with clean engine oil. Tighten all bolts to finger tight then continue on with the following procedure.

13.5 ft. lbs.3.5 ft. lbs
237.0 ft. lbs.37 ft. lbs
3Loosen bolts 360 degrees in reverse order360 degrees
43.0 ft. lbs.3 ft. lbs
59.0 ft. lbs.9 ft. lbs
6Bolts 1-265 degrees
7Bolts 3-660 degrees
8Bolts 1-265 degrees
9Bolts 3-660 degrees
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 2 stages
1Tighten in Sequence11 ft. lbs
2Tighten in Sequence an additional 45

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 10,000 mi; spark plugs every 30,000 mi; coolant every 20,000 mi. The big-interval services (every 20,000 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 10,000 miBrake Line (inspect) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Headlamp (inspect alignment) · Tire & Wheel Assembly (inspect) · Underbody (inspect)
Every 20,000 miAir Intake System (inspect) · Body Water Drains (inspect) · Brake System (inspect) · Cabin Air Filter (replace) · Driveshaft (inspect) · Engine Coolant System (inspect fluid level)
Every 30,000 miSpark Plugs (replace)
Every 40,000 miAccessory Drive Belt (inspect) · Body Latches, Locks & Hinges (inspect) · Brake Linings (inspect) · Brake Rotor (inspect) · CV Joint Boot (inspect) · Engine Air Filter Element (replace)
Every 60,000 miDrive Belt (replace)
Every 80,000 miEngine Mount (inspect)
At 120,000 miTransmission Assembly (drain & 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.

2
Open recalls
NHTSA campaigns
487
Service bulletins
Manufacturer communications
1
ODI investigations
Office of Defects Investigation
0
Owner complaints
0 involved a crash · 0 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Overall★★★★★
Frontal★★★★★
Side★★★★★
Rollover★★★★★
Owner complaints by model year NHTSA · this generation & adjacent

No owner complaints on record with NHTSA for this vehicle.

Recalls NHTSA · verified

Showing 2 of 2 campaigns on record for this vehicle.

19V179000Air BagsReported 06/03/2019

Porsche Cars North America, Inc. (Porsche) is recalling certain 2018 718 Boxster, Boxster S and Boxster GTS, 718 Cayman, Cayman S and Cayman GTS, 911 Carrera, Carrera T, Targa 4 GTS, Carrera 4, Carrera S, Carrera 4S… Remedy: Porsche will notify owners, and dealers will tighten the air bag sensors, as necessary, free of charge. The recall began May 17, 2019. Owners may contact Porsche customer service…

19V113000Fuel System, GasolineReported 20/02/2019

Porsche Cars North America, Inc. (Porsche) is recalling certain 2017-2019 718 Boxster, 718 Boxster S, 718 Cayman and 718 Cayman S vehicles and 2018-2019 718 Boxster GTS and 2018-2019 718 Cayman GTS vehicles. In the… Remedy: Porsche will notify owners, and dealers will secure the crossmember with additional rivets, free of charge. The recall began April 19, 2019. Owners may contact Porsche customer…

Technical service bulletins NHTSA · verified

Showing 5 of 487 bulletins on record with NHTSA.

BulletinDateComponentSummary
40/26 44072026-06-30WheelsWheel Bolt Replacement Requirement - Change from Wheel Bolts with Aluminum Washers to…
09/26 37302026-06-30Power TrainPermanent Fault Memory Entries “P1775”/“P071400”/“P184900” in Transmission Electronics…
TSTR26362026-06-29Unknown Or OtherPorsche Tester Software Update Information Software Version: 44.200.031
TSTR26352026-06-29Unknown Or OtherPorsche Tester Software Update Information Software Version: 44.200.030
20/262026-06-25EngineOverview of Approved Porsche C20 Engine Oils (20/26)

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 718 Boxster. 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 2018 718 Boxster take?

6.0 qt of Use genuine Porsche A40 lubricant or equivalent, per the factory manual.

Does the 2018 718 Boxster have open recalls?

NHTSA lists 2 recall campaign(s) for this model year. Check your specific vehicle by VIN.