911 · 1974–1989
What owners spend on a G-body
Based on 216 completed service records logged by 9 owners of the Porsche G-body G-Series / Impact Bumper, converted to US dollars.
Median per record
$249
Median per year
$1,533
6 cars with multi-record history
Records
216
Documented spend
$200,578
Most logged jobs on the G-body
| Job | Records | Median cost |
|---|---|---|
| Oil service | 21 | $253 |
| Inspection & scheduled service | 15 | $78 |
| Brakes | 12 | $1,049 |
| Tyres & alignment | 11 | $394 |
| Suspension | 9 | $320 |
| Transmission | 6 | $2,737 |
| Ignition | 6 | $697 |
| Battery | 5 | $398 |
| Filters | 4 | $74 |
| Clutch & flywheel | 3 | $155 |
Where the money goes
Share of the 3 G-body records that have a category set.
Known issues to budget for
Documented weak points for this generation, with reference repair costs from the Elferlog registry.
Galvanic Corrosion at Steel/Aluminum Joints
Bubbling paint around fender/door joints, hidden corrosion
Timing Chain Tensioner Failure
Rattling on cold start, chain noise at idle
Turbo Wastegate Failure (930)
Overboosting, uncontrolled boost spikes, potential engine damage
Valve Guide Wear
Blue smoke on deceleration, increased oil consumption
How these numbers are made
- Every figure comes from service records Porsche owners logged on Elferlog for their own cars. This is what this group of owners paid — not a market average, and not a manufacturer estimate.
- Only completed work with a recorded cost is counted. Planned work, AI suggestions and fuel fill-ups are excluded.
- Owners log in their own currency. Amounts are converted to US dollars with a fixed reference rate table, so the numbers stay stable between visits rather than moving with the FX market.
- Medians are used everywhere, not averages — one engine rebuild should not decide what an oil service costs.
- A figure is only published when at least 5 records from at least 3 different cars support it. Anything thinner is shown as “not enough data yet”.
- Categories are shown as a share of records that have a category set, not of every record.
- No personal data, no individual car and no owner is identifiable from this page.
More on this generation: G-body variants, specs and documented cars.