Questions for Model Year '1999'
1999 Boxster Need Radio Code for Original Radio.
Monday 10/05/2026 | 1999 | Boxster | Other
Hello,How do I find the radio code for my 1999 Boxster. Purchased the car and need the code.Original Unit.ThanksPeter
READ ANSWERWhat oil pressure sending unit do in need to hook to a VDO guage
Friday 10/02/2026 | 1999 | Boxster | Engine
I have replaced my stock oil pressure sending unit with a 1999 911 one so I have a pressure gauge. I connected a sending wire to a VDO International II gauge. At start up the oil pressure is fine at about 5 bar. When the engine warms up, the pressure maxes out at about 40 psi at around 3000 to 6000 rpms. It idles about 4 or 5 psi. Do I need a different sending unit? The gauge is 10 to 180 ohms. a direct reading on the sender shows 44 ohms at idle warmed up. There is no resistance in t ...
READ ANSWERWhat’s causing oil mixing in with the coolant system
Friday 09/25/2026 | 1999 | 911 Carrera | Engine
READ ANSWERWhat are the options for this vin? WP0AA2995XS624289
Sunday 09/13/2026 | 1999 | 911 Carrera | Other
The options tag was lost when the hood was repaired and the maintenance log starts on page 3
READ ANSWERGuidance on 986 Boxster springs
Wednesday 09/09/2026 | 1999 | Boxster | Suspension
I’ve been on several forums but the answers have been wildly divergent.What I’m trying to accomplish is sharpen the handling a little while maintaining the compliance which makes it great for travel. The ROW 030 sounds temping, but again, no solid indicators if this is a good choice for Illinois’ MX-like roads. I will add that at 80k miles, I am surprised to find the OE shocks seem good. I had a previous positive experience with Koni yellows on another German car so that part is easy. ...
READ ANSWERI need to replace my Right rear window regulator
Thursday 08/27/2026 | 1999 | 911 Carrera Cabriolet | Cables and Controls
I am a reasonably skilled mechanic and as such want to change out the right rear window regulator on my ‘99 911 Cabriolet . With the hydraulics for the top in the way it seems like quite an adventure. can you provide any helpThank youWilliam B Burke
READ ANSWEREarly 986 wheels
Wednesday 08/26/2026 | 1999 | Boxster | Wheels and Tires
I’ve read that early Boxsters should not use over 17 inch wheels due to frame cracking caused by larger wheels. The tire pressure chart in the manual shows data for 18s. Can I use them on my 99?
READ ANSWERShould I replace radiator air ducts when cleaning condensor and radiator coils
Friday 07/24/2026 | 1999 | Boxster | Engine
I have a 1999 Porsche Boxster and I want to have the bumper removed to access the condenser coils and radiator coils to clean debris.Since this has not been done to the car for 26 years, I wanted to ask if it would be a good idea to order the radiator air ducts to have them on hand since I don't know if the original ones will come apart without being damaged.Looking forward to your feedback!Best Regards,Bob Grogan ...
READ ANSWERShould I replace the Dual IMS Bearing on a 99 996 Manual since it just crossed 85k miles?
Thursday 07/16/2026 | 1999 | 911 Carrera 4 Cabriolet | Engine
I've had the car for about 12 years and haven't had any issues with the engine or transmission (recently had it flushed). If I do the bearing, I would likely do the clutch and the flywheel with it but it there are currently no issues with any of those systems. Since the 99 has a duel bearing, is the risk lower than a later year one with a single row bearing? If I were to do it, would use LN Engineering Replacement Solution. Any risk of introducing new issues? Thanks for the advice and co ...
READ ANSWERWhy does my horn not work
Friday 07/03/2026 | 1999 | Boxster | Electrical
Why does my horn not work
READ ANSWEROriginal owner of my 99 986 5 speed with 72k miles. While making a very hard left turn I'm hearing a brief grinding sound, so I stopped doing that. Someone told me it's likely a motor mount issue?
Tuesday 06/23/2026 | 1999 | Boxster | Suspension
READ ANSWERIssues after clutch replacement (SPEC stage 2 - SMF)
Monday 06/08/2026 | 1999 | 911 Carrera | Transmission/Clutch
I recently had the clutch replaced with the SPEC stage 2 clutch and SMF, as recommended by the indy shop near me. Since getting the car back, when the vehicle is warm, the clutch seems to refuse to disengage when I press the pedal down. They replaced the master and slave cylinders, and I've bled it myself to ensure there is no air in the lines at all. 6th gear is impossible to engage at all, and 1st/Reverse can only be engaged by shutting off the engine, selecting the gear, and restarting (wh ...
READ ANSWER1999 996 Carrera 4 upgrades
Saturday 05/09/2026 | 1999 | 911 Carrera 4 | Performance Modifications
Hi fellow Porsche peeps :)Curious to hear what performance upgrades you all recommend for a mostly stock C4 from 1999 that don't break the bank. This one has the factory sport suspension setup (code 030). So far, I have gotten wider wheels and tires and a smaller and thicker steering wheel. More power would be nice (isn't it always), and I'd be game for better brakes, modest / simple-ish suspension tightening, a different sound (Gundo hack??)... must still pass California smog. ...
READ ANSWERCode P0442- evaporative Emission System Leak Detected (Small Leak). Replaced fuel cap . . . .still returns. Where should I look next?
Tuesday 04/07/2026 | 1999 | 911 Carrera | Fuel System
READ ANSWERI have a 1999 Boxster with about 125,000 miles on it. Some portions of my LCD dash display are not illuminating. Some segments of the oil level display on the right side have stopped illuminating (but not all) failed first, and now my odometer does not illuminate. I can tell it's still working if I catch bright light from sun or flashlight on it, but it does no illuminate. Is this a repairable situation? and
Wednesday 11/12/2025 | 1999 | Boxster | Electrical
Over the last couple of years, the oil level 'count down' segments stopped illuminating, first the top segment, then another halfway down, then another ... a couple random segments still work.Then last year, my odometer and trip odometer stopped displaying one day, then later while driving reappeared.Few days later it happened again, but then never illuminated again.If I catch bright sunlight or a bright flashlight on the display at the right angle, I can see that it is s ...
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