Loading...
Lexus LS500h Manifold Absolute Pressure Sensors
Lexus Ls500H Manifold absolute pressure sensors
Starting at $154.95, AutoBuffy stocks 3 manifold absolute pressure sensors from Delphi, Denso, and Febi to fit your Lexus Ls500H. The MAP sensor reads intake manifold vacuum and sends that pressure data to the ECU so it can calculate the correct air-fuel mixture. A failing sensor throws off fueling, hurts mileage, and can trigger a no-start condition.
Signs your Lexus Ls500H needs a new manifold absolute pressure sensor
- Check Engine light on, commonly with codes P0105, P0106, P0107, or P0108
- Rich or lean misfire — engine stumbles, hesitates, or surges under acceleration
- Noticeably worse fuel economy with no other obvious cause
- Hard starting or extended cranking, especially when the engine is warm
- Black smoke from the exhaust or strong fuel smell, indicating a rich-running condition
- Failed emissions test or elevated hydrocarbons and CO readings at the tailpipe
Which manifold absolute pressure sensor should you buy for your Lexus Ls500H?
MAP sensors vary mainly by quality tier and whether you need a standalone sensor or a combined MAP/IAT (intake air temperature) unit. Confirm your Lexus Ls500H uses a separate MAP sensor versus an integrated sensor before ordering, and match the connector shape and bar rating to your factory spec.
OE-equivalent replacement
Best for
Daily driver needing a direct bolt-in fix
What you get
Matched connector, calibration, and pressure range; typically plug-and-play with no relearn needed
OEM-brand (dealership-spec)
Best for
High-mileage vehicles or persistent diagnostic headaches
What you get
Factory part number match, tightest calibration tolerance, longest expected service life
Combined MAP/IAT sensor
Best for
Vehicles where the factory integrates both signals in one unit
What you get
Replaces two sensors in one swap; confirm your Lexus Ls500H uses this integrated design before purchasing
Performance / high-boost MAP sensor
Best for
Forced-induction or modified Lexus Ls500H with elevated manifold pressure
What you get
Extended pressure range (3-bar or higher) to accurately read boost levels that exceed a stock 1-bar sensor's limit
| Option | Best for | What you get |
|---|---|---|
| OE-equivalent replacement | Daily driver needing a direct bolt-in fix | Matched connector, calibration, and pressure range; typically plug-and-play with no relearn needed |
| OEM-brand (dealership-spec) | High-mileage vehicles or persistent diagnostic headaches | Factory part number match, tightest calibration tolerance, longest expected service life |
| Combined MAP/IAT sensor | Vehicles where the factory integrates both signals in one unit | Replaces two sensors in one swap; confirm your Lexus Ls500H uses this integrated design before purchasing |
| Performance / high-boost MAP sensor | Forced-induction or modified Lexus Ls500H with elevated manifold pressure | Extended pressure range (3-bar or higher) to accurately read boost levels that exceed a stock 1-bar sensor's limit |
Manifold absolute pressure sensors brands we stock for your Lexus Ls500H
Delphi
1 option · from $177.95
Denso
1 option · from $353.95
Febi
1 option · from $154.95
Replacing a manifold absolute pressure sensor on a Lexus Ls500H
Easy⏱ 20–45 minutesOBD-II scan tool (to read and clear codes)Flathead and Phillips screwdriversSmall socket set or nut driverElectrical contact cleanerNeedle-nose pliers (for stubborn vacuum line clamps)
The MAP sensor on most vehicles is mounted directly on the intake manifold or connected to it via a short vacuum hose, making access straightforward in most engine bays. Disconnect the negative battery terminal, unplug the electrical connector, remove the one or two fasteners or pull the sensor from its port, then press the new sensor into place and reconnect everything in reverse order. Inspect the vacuum line and connector for cracks or corrosion before buttoning up, as either can cause the same fault codes as the sensor itself.
Frequently asked questions
How much does it cost to replace manifold absolute pressure sensors on a Lexus Ls500H?
Parts start at $154.95 on AutoBuffy for a Lexus Ls500H MAP sensor. DIY total cost is just the part plus any gasket or O-ring if needed. A shop will add one to two hours of labor on top of the part price, so expect a noticeably higher total at a dealership or independent repair shop.
Can I drive my Lexus Ls500H with a bad MAP sensor?
Short trips are possible but not advisable. A faulty MAP sensor causes the ECU to miscalculate fueling, which can foul spark plugs, wash cylinder walls with excess fuel, damage the catalytic converter over time, and significantly worsen fuel economy. Fix it promptly to avoid compounding the repair cost.
Will replacing the MAP sensor on my Lexus Ls500H clear the Check Engine light?
Once the new sensor is installed and the root cause of the fault is resolved, the ECU will clear the pending code after a set number of successful drive cycles, or you can clear it immediately with an OBD-II scanner. If the light returns, another fault — such as a vacuum leak — may be contributing.
How do I test a MAP sensor on my Lexus Ls500H before replacing it?
With the ignition on and engine off, use a multimeter or scan tool to check the sensor's reference voltage (typically 5 V), ground, and signal output. Live data on a scan tool should show manifold pressure rise and fall smoothly with engine load. A signal stuck at max or min voltage, or one that doesn't respond, confirms a failed sensor.
What causes a MAP sensor to fail on a Lexus Ls500H?
The most common causes are oil vapor contamination from the crankcase ventilation system coating the sensing element, heat cycling that degrades the internal resistors over time, a cracked or loose vacuum line that exposes the sensor to unmetered air, and corrosion on the electrical connector from moisture intrusion.
Does my Lexus Ls500H need a MAP sensor relearn after replacement?
Most vehicles do not require a formal relearn procedure — the ECU begins reading the new sensor immediately on startup. Some platforms with adaptive fuel trim tables benefit from an idle relearn or a full drive cycle to let the ECU recalibrate. Check your Lexus Ls500H service information to confirm whether a specific procedure applies.