Chapter 1 · 991 · by HBi Auto
Buying a Porsche 991.1 Carrera 4 GTS
What it really sells for, what moves the price, what to check and the maintenance it needs.
The 991.1 Carrera 4 GTS is part of the 991 generation (2012–2019). This lesson covers what it really sells for, what moves the price, what to check and how to look after it.
- Built
- 2015–2016
- Cars on 911 Tracker
- 14
- Sales on record
- 10
- Median, last 24 months
- Too few to quote
What to pay
Only 1 sold in the last 24 months, too few to quote a median; use the chart below and price the car on its own history. The trend line through every sale on record moves about +5% a year.
911 Tracker, VIN-checked US sales, as of Oct 30, 2026. Medians need 5 or more sales.
What to look for
991.1 GT3 engines
Early cars were recalled and many had engines replaced by Porsche. Check what was done and that the paperwork is with the car.
Over-revs
Manual cars store over-rev history in the engine computer. Read it with a factory scan.
Front lift and PDCC
Check every hydraulic option works; they are costly to fix.
Maintenance schedule
Maintenance planner
Pick the car, enter its miles and model year: the planner shows what is due now, the next services and the full schedule, whichever comes first, miles or years.
| What is done | 10k | 20k | 30k | 40k | 50k | 60k | 70k | 80k | 90k | 100k | 110k | 120k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Engine oil and filterEvery 10,000 mi, 1 yr · Porsche US | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● |
| Inspection: lights, brakes, tires, leaks, fault memory, test driveEvery 20,000 mi, 2 yr · Porsche US | ● | ● | ● | ● | ● | ● | ||||||
| Brake fluidEvery 2 yr · Porsche US | ||||||||||||
| Spark plugsEvery 40,000 mi, 4 yr · Porsche US | ● | ● | ● | |||||||||
| Engine air filtersEvery 40,000 mi, 4 yr · Porsche factory (converted from km) | ● | ● | ● | |||||||||
| Drive beltEvery 60,000 mi, 6 yr · Porsche factory (converted from km) | ● | ● | ||||||||||
| PDK clutch fluidEvery 120,000 mi, 12 yr · Porsche factory (converted from km) | ● | |||||||||||
| AWD controller oil (all-wheel drive)Every 60,000 mi, 4 yr · Porsche factory (converted from km) · Carrera 4 / 4S and Turbo; factory sheet for another market | ● | ● | ||||||||||
| Front differential oil (all-wheel drive)Every 120,000 mi, 12 yr · Porsche factory (converted from km) · All-wheel-drive cars | ● | |||||||||||
| PDK / automatic transmission oilEvery 120,000 mi, 12 yr · Porsche factory (converted from km) | ● | |||||||||||
| Tire sealant (if fitted)Every 4 yr · Porsche US |
911 (991.1), 2012–2016: what is done, version by version
Turbo / Turbo S: Spark plugs every 30,000 mi / 4 yr
GT3 / GT3 RS: Engine oil and filter every 12,000 mi / 1 yr, Inspection: lights, brakes, tires, leaks, fault memory, test drive every 12,000 mi / 2 yr, Spark plugs every 12,000 mi / 2 yr, Engine air filters every 24,000 mi / 4 yr, PDK clutch fluid every 48,000 mi / 6 yr, Manual gearbox oil every 96,000 mi / 12 yr
Not verified yet: Manual gearbox oil: the factory sheets disagree (120,000 mi / 12 yr vs 160,000 mi / 16 yr); Cabin filter interval.
Confidence: Medium. Sources: 1, 2.
Full table: 911 (991.2), 2017–2019, every 10,000 miles
| What is done | 10k | 20k | 30k | 40k | 50k | 60k | 70k | 80k | 90k | 100k | 110k | 120k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Engine oil and filterEvery 10,000 mi, 1 yr · Porsche US | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● |
| Inspection: lights, brakes, tires, leaks, fault memory, test driveEvery 20,000 mi, 2 yr · Porsche US | ● | ● | ● | ● | ● | ● | ||||||
| Brake fluidEvery 2 yr · Porsche US | ||||||||||||
| Spark plugsEvery 30,000 mi, 4 yr · Porsche factory (converted from km) | ● | ● | ● | ● | ||||||||
| Engine air filtersEvery 40,000 mi, 4 yr · Porsche US | ● | ● | ● | |||||||||
| Drive beltEvery 60,000 mi, 6 yr · Porsche US | ● | ● | ||||||||||
| PDCC hydraulic fluid (if fitted)Every 60,000 mi, 6 yr · Porsche US | ● | ● | ||||||||||
| Manual gearbox oilEvery 120,000 mi, 12 yr · Porsche US | ● | |||||||||||
| PDK / automatic transmission oilEvery 120,000 mi, 12 yr · Porsche US | ● | |||||||||||
| Tire sealant (if fitted)Every 4 yr · Porsche US |
GT3 / GT3 RS / GT2 RS / Speedster: Engine oil and filter every 12,000 mi / 1 yr, Inspection: lights, brakes, tires, leaks, fault memory, test drive every 12,000 mi / 2 yr, Spark plugs every 12,000 mi / 2 yr, Water-spray filter (GT2 RS) every 1 yr
Not verified yet: Cabin filter interval; PDK clutch fluid and all-wheel-drive oils (the US Carrera sheet was not found).
Confidence: Medium. Sources: 1, 2.
Intervals are whichever comes first, miles or years. "Porsche factory (converted from km)" means Porsche's own figure for another market, turned into miles with the same km-to-mile pairing Porsche uses in the US. Your car's own maintenance booklet is the final word. HBi Auto's recommendations for cars that are tracked, driven hard or stored are being added by our service team.
What it really costs to buy a 991.1 Carrera 4 GTS
Your numbers, your state. Everything stays on your screen.
- Tax
- –
- Fees, shipping, inspection
- –
- Reserve
- –
- Total to have ready
- –
The 111-point checklist: 991.1 Carrera 4 GTS
HBi Auto's full 111-point inspection, the same list our technicians sign on every car we certify. Tick as you go; your ticks stay on this device. Print it, or download the blank form (PDF) and take it to your inspection.
0 checked
Go deeper
Written by the 911 Buyers and HBi Auto team in Mocksville, NC. Market numbers come from 911 Tracker's VIN-checked US sales and say what they are based on; maintenance intervals say where each one comes from. This course is general information, not an inspection, an appraisal or legal or tax advice.