M28.70/M28.80
Porsche · 4.0 V8 Twin-Turbo
2017–present
"Brute force V8TT. 550-630hp. Reliable but maintenance costs are eye-watering. Turbo oil lines need watching."
Mileage Risk Timeline
When problems typically appear — enter your mileage to see your risk zone
Known Issues 4
Turbo oil feed line leak
▸Oil on undertray, burning smell, low oil warning
Oil feed lines to turbos can develop leaks. Fire risk if ignored. Inspect at every service.
Σωλήνες τροφοδοσίας λαδιού turbo. Κίνδυνος φωτιάς αν αγνοηθεί. Έλεγχος σε κάθε σέρβις.
Ignition coil / spark plug failure
▸Misfire, rough idle, CEL
High-output V8TT is hard on ignition components. Replace plugs every 40k km. Coils every 80k km.
Υψηλής απόδοσης V8TT φθείρει μπουζί/πολύ. Αλλαγή μπουζί κάθε 40k km, πολύ κάθε 80k km.
Coolant line / hose deterioration
▸Coolant weep, sweet smell, low coolant warning
Multiple coolant hoses in tight V8 bay. Silicone upgrade recommended at 80k+ km.
Πολλοί σωλήνες ψυκτικού σε στενό χώρο V8. Αναβάθμιση σε σιλικόνη συνιστάται στα 80k+ km.
Engine/transmission mount wear
▸Vibration at idle, clunk on acceleration
Heavy V8TT stresses mounts. Hydraulic mounts wear. Replace in pairs.
Βαρύ V8TT φθείρει βάσεις. Υδραυλικές βάσεις. Αντικατάσταση σε ζεύγη.
Models with M28.70/M28.80 4
Other Porsche Engines
Tuning Potential
Stage 1 ~700hp
Frequently Asked Questions
Is the Porsche M28.70/M28.80 reliable?
The Porsche M28.70/M28.80 scores 70/100 with a verdict of ACCEPTABLE. It has 4 documented issues with total repair costs between €3,800 and €10,200.
What are the common problems with the M28.70/M28.80?
The most common issues are:
- Turbo oil feed line leak — high, repair cost €2,000–€5,000, 50,000 km–100,000 km
- Ignition coil / spark plug failure — moderate, repair cost €400–€1,200, 40,000 km–80,000 km
- Coolant line / hose deterioration — moderate, repair cost €800–€2,500, 60,000 km–120,000 km
- Engine/transmission mount wear — minor, repair cost €600–€1,500, 80,000 km–150,000 km
What cars use the Porsche M28.70/M28.80?
The M28.70/M28.80 is found in:
- Panamera (2017–2020)
- Panamera (2020–2024)
- Cayenne Turbo (2018–present)
- Cayenne Turbo GT (2021–present)
How much does it cost to repair the M28.70/M28.80?
Total potential repair costs for all 4 known issues range from €3,800 to €10,200. The most expensive issue is typically .
What years was the M28.70/M28.80 produced?
The Porsche M28.70/M28.80 was produced from 2017 to present. It is a 3996cc V8 petrol turbo engine.
Verdict and scores are editorial opinions based on aggregated data. Learn about our methodology. Not a substitute for professional inspection.