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Porsche 993: Buying Guide

This guide will show you what to look out for when buying a used 993.

By Jared Hammond - March 17, 2015

This article applies to the Porsche 993 (1993-1998).

After months of searching you've finally settled on the Porsche 993. An excellent choice. The 993 is the last generation of air-cooled 911s which many Porsche enthusiasts consider to be the true traditional 911. You won't have to worry about deteriorating resale value when buying a used 993 since they are considered a modern classic. Plus you get to enjoy the classic Porsche feel with a few modern conveniences. But now the question is what to look for when buying one. This guide will break it down to the few trouble spots you should look out for when buying a used 993.

Engine and Transmission

Figure 1. The Engine should get your first look.

As with any car, the engine should be the priority when looking at a 993. Just look for any kind of physical issues such as possible oil leaks, rust or corrosion. You may also want to check the underside of the engine as well for similar issues, but ask the owner for permission to remove the undertray before you do. Another thing to check would be the fluid levels of the motor oil and transmission fluid.

Exterior and Interior

Figure 2. Minor scratches like this aren't necessarily a deal breaker.

Any real exterior damage will be immediately apparent, but stay on the look out for signs of repainting or misaligned paneling. Ask the owner about anything that seems off. What you're really looking for is any indication of structural damage. If you see signs of major repair work, it's best to walk away. Also check out the interior and see if it's to your liking. If the interior is a mess, it may tell you something about how well the owner took care of the car.

Mileage and Condition

Figure 3. Get the car inspected by an expert before you buy.

The age of the car and the amount of miles put onto it should tell you something about its condition. Ask the owners for an accident report and its maintenance schedule. If they kept to Porsche's recommended schedule, the car should be well maintained. Before you make the decision to purchase, always get a pre-purchase inspection from a Porsche expert. They'll know about all the things you couldn't look for.

Common Issues

Carbon buildup in SAI ports.

This is probably the most common issue found in 993s. Due to worn valve guides you slowly start to get carbon buildup in the SAI ports which triggers the check-engine light. It's not as serious as you would think, as you can go a long time without performance issues. But over time you'll notice an increase in the car's oil consumption. Fixing it will require a pricey top end rebuild, or as a cheaper alternative you can flush the SAI.

(Related: How often does a Porsche 993 need a top end rebuild - Rennlist.com)

Wiring Harness

There was a recall on the engine wiring harness affecting '95 and '96 models. Check the vin number of your wiring harness to see if it's the up to date version. If not, bring it in to the nearest Porsche dealer to have it replaced.

(Related: Engine Wiring Harness Recall - Rennlist.com)

Steering Rack

The steering rack should be checked for steering fluid leaks. Cracks can form in the steering rack boots letting in dirt and debris which can further damage the steering rack. These issues are indicated by groaning or creaking whenever the steering wheel is sharply turned . Eventually the steering rack will need to be replaced.

(Related: Common 993 Issues - Rennlist.com)

Related Video - Porsche 993 User Guide

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