Porsche · Coupé · 1984–1989

Porsche 911 G-Modell Coupé

Weaknesses, engine ratings and buying advice

★★★★★

1.0 / 5.0 · Based on 1 engine variants

Engine Overview

The Porsche 911 G-Modell Coupé is available with one engine variant at 231 hp.

3.2L · Benziner· 231 PS

1984 1989

Stay Away! 8 weaknesses

	Weakness	Cost
✖	Sills and Floor Panels Rust Fully galvanised from 1981, but the sill connecting panel rots from inside due to trapped moisture. Floor panels and longitudinal members are also affected. Repair is very labour-intensive. Symptoms: Rust at sill weld seams; soft spots on the underside; paint blisters at the outer sill edge. Ad rocker panel Porsche 911 G-Modell Bodenblech 911 G SC 930 repair panel	High
✖	Wings and B-Pillar Rust Vulnerable spots: front wings at headlight housings, rear wings at tail light clusters, and the B-pillar in the lower curved area. Rust starts from inside via moisture from the wheel arch. Symptoms: Paint bubbles at wing lower edges; visible rust at B-pillar weld seams; blistering at wheel arches. Ad fender Porsche 911 G-Modell B-Säule 911 G repair panel	High
!	Battery Tray Corrosion from Battery Acid Lead sulphate deposits and battery acid eat through the battery tray and the underlying tank support panel. Corrosion progresses invisibly between the sheet metal layers. Symptoms: Whitish powder in the battery compartment; rust on tank flange and battery tray; corroded battery terminals. Ad batteryfach Rost 911 G-Modell Tankauflage Porsche 911 SC Rostschutz	High

What problems and weaknesses does the Porsche 911 G-Modell Coupé have? +

The Porsche 911 G-Modell as Coupé has 17 known weaknesses, 9 vehicle-related.

Which engine is recommended? +

None of the available engines are rated 'Good Choice'. Stay Away!!

Is the Porsche 911 G-Modell Coupé worth buying used? +

Caution is advised with the Porsche 911 G-Modell Coupé — 1 of 1 engine variants are rated 'Stay Away!'.

Last updated: February 2026 · All information without guarantee