What weaknesses does the Porsche 911 G-Modell have?

The Porsche 911 G-Modell has 8 known engine weaknesses and 9 vehicle weaknesses. Repair costs range from 18,200 to 65,300 EUR.

Which engine is recommended for the Porsche 911 G-Modell?

None of the available engines are rated as 'Good choice'. Stay away!

Porsche · Sports Car · 1984–1989

Porsche 911 G-Modell

Name: Porsche 911 G-Modell
Brand: Porsche
Rating: 1.5 (1 reviews)

Weaknesses, engine ratings and buying advice

★★★★★

1.0 / 5.0 · Based on 1 engine variants

Body Variants

The Porsche 911 G-Modell is available as Coupé and Cabrio — choose your body type for specific insurance data:

Coupé

1 Engines 1× Stay Away!

view Coupé →

Cabrio

1 Engines 1× Stay Away!

view Cabrio →

Generations

Engine Overview

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

3.2L · Benziner· 231 PS

1984 1989

Stay Away! 8 weaknesses

The Porsche 3.2L (Benziner, 231 PS) has the 930.20 (3.2L) — rated: "Stay Away!", 8 known weaknesses.

Vehicle 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

NHTSA Owner Complaints

Above Average

3 complaints · 1984–1989

Seat Belts

Fuel System

Gasoline

Top Reported Issues

⚠ Seat Belts (2 complaints)

⚠ Fuel System (1 complaints)

⚠ Gasoline (1 complaints)

Source: NHTSA (nhtsa.gov) · 2026-03

Known Problems and Issues

A total of 17 weaknesses have been documented for the Porsche 911 G-Modell (1984–1989) — 8 engine-related and 9 vehicle-related. One problem engine: 930.20 (3.2L). Typical issues affect Rust, Suspension, Electronics, HVAC.

911 (930.20, 1984–1989) — Stay Away!: Stud bolts fractured (cylinder head), Hydraulic chain tensioner O-ring defective, Ignition distributor Hall sensor defective. Power: 231 PS.

What to watch out for with the Porsche 911? See the detailed listing of all engine and vehicle weaknesses in the sections above.

Frequently Asked Questions

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

The Porsche 911 G-Modell has 8 known engine weaknesses and 9 vehicle weaknesses.

What should I look for when buying a used Porsche 911 G-Modell? +

faq.watch_a_avoid

Which engine is recommended? +

None of the available engines are rated 'Good Choice'. Stay away! The most fun to drive is the 930.20 (3.2L). Problem engine: 930.20 (3.2L) — stay away!

Which Porsche 911 G-Modell engine is the most fun? +

The {code} ({displacement}) offers the most driving fun in the Porsche 911 G-Modell — rated: "Legendary!". {description} There are sports cars, and then there's the 3.2 Carrera on a mountain pass in third gear. The engine stretches from 3,500 rpm, the boxer howl swells, the tail pushes gently, the steering communicates every millimetre. No driver assist, no screen, no safety net. Prefer post-1987 examples with the G50 gearbox — noticeably easier to handle than the 915 units. Drive a 3.2 hard on an open road once and you understand why these cars never stop setting prices.

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

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

What horsepower variants are available for the Porsche 911 G-Modell? +

The Porsche 911 G-Modell is available with engine variants from 231 to 231 hp. Petrol: 930.20 (3.2L).

Last updated: February 2026 · All information without guarantee