Chapter 1 · 996 · by HBi Auto
Buying a Porsche 996.1 Carrera 4
What it really sells for, what moves the price, what to check and the maintenance it needs.
The 996.1 Carrera 4 is part of the 996 generation (1999–2005). This lesson covers what it really sells for, what moves the price, what to check and how to look after it.
- Built
- 1999–2001
- Cars on 911 Tracker
- 0
- Sales on record
- 0
- Median, last 24 months
- Too few to quote
What to pay
911 Tracker, VIN-checked US sales, as of Oct 30, 2026. Medians need 5 or more sales.
What to look for
IMS bearing (Carrera)
The intermediate-shaft bearing on M96 engines can fail without warning. Many have been upgraded; ask for the invoice. Mezger cars do not have this problem.
Rear main seal
An oil leak between engine and gearbox. Common; often done together with the IMS and clutch.
Bore scoring
Scored cylinder walls on higher-mile engines. A borescope inspection settles it.
Coolant system
Radiators behind the front bumper collect debris and corrode; check them and the expansion tank.
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 | 15k | 30k | 45k | 60k | 75k | 90k | 105k | 120k |
|---|---|---|---|---|---|---|---|---|
| Engine oil and filterEvery 15,000 mi, 2 yr · Single source · The factory interval when new, from one Porsche dealer outside the US | ● | ● | ● | ● | ● | ● | ● | ● |
| Brake fluidEvery 2 yr · Porsche US | ||||||||
| Spark plugsEvery 4 yr · Porsche factory (converted from km) · Every 4 years; the US mileage was not found |
911 (996), 1999–2005: what is done, version by version
Turbo / GT2 / GT3 (Mezger engine):
Not verified yet: Most US intervals for the 996: air and cabin filters, drive belt, gearbox oils; The IMS bearing is not a factory service item; see common repairs.
Confidence: Low. 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 996.1 Carrera 4
Your numbers, your state. Everything stays on your screen.
- Tax
- –
- Fees, shipping, inspection
- –
- Reserve
- –
- Total to have ready
- –
The 111-point checklist: 996.1 Carrera 4
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.