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• 5P0035191D (also written 5P0 035 191 D) is a Volkswagen-Group OEM “RNS 315 / Media System 2.2” double-DIN radio-navigation head-unit supplied mainly for SEAT vehicles (Leon 1P, Altea / Altea XL, Alhambra and Toledo Mk III, roughly MY 2009-2015).
• It integrates AM/FM tuner, CD/MP3 player, SD/SDHC reader, internal flash-based GPS navigation, CAN-Bus gateway, Bluetooth® hands-free/audio-streaming, AUX-in and standard Quadlock power/speaker connector.
Key points
– Fits PQ35/PQ46 platform cars with RED illumination (SEAT colour scheme).
– Requires 12 V supply, ignition (terminal 15) and CAN-Bus for wake-up/sleep.
– Security is protected by a 4-digit PIN and (from 2011-up) component protection / VIN pairing.
– Typical faults: flash corruption → stuck on logo, GPS loss, LCD back-light failure, battery drain after retro-fit (old CAN-Gateway).
Hardware overview
• Freescale i.MX31 applications processor (ARM11 @ 532 MHz)
• 256 MB NAND flash (maps/firmware) + 128 MB DDR SDRAM
• 5.0" QVGA (400 × 240) resistive touch TFT
• Panasonic/TechniSat optical drive (single CD, Red-Book & MP3)
• Dual-tuner AM/FM front-end with diversity; two Fakra antenna inputs
• On-board SiRF-Star III/IV GNSS receiver, blue Fakra for active antenna
• CSR BlueCore5-MM Bluetooth module (HFP, A2DP, PBAP, AVRCP)
• Quadlock (ISO 10487 extended) – pins identical to other RNS 315 units
• Optional external interfaces via MOST not populated on SEAT variant
Functional blocks
a. Audio: 4 × 20 W class-AB outputs, line-level front/rear on Quadlock C.
b. Navigation: maps stored internally; SD card used only for updates.
c. Human-machine interface: hard keys + rotary encoder + touch panel.
d. Vehicle integration:
– CAN-High/Low pins 9/10 (black connector B) for KL 15/KL 30 status, illumination dimming, steering-wheel buttons, OPS/PDC overlays, etc.
– K-line (pin 7) for legacy diagnostics.
Firmware / coding
• SW-train names: e.g. “0357”, “0360”, “0275”. Latest for SEAT (as of 2024) is 0360.
• Coding (VCDS address 37/56): country region, speaker layout, amplifier-present bit, rear-camera enable, PDC overlay type, language set.
• Component protection: if installed in another car, the unit boots but audio/nav are muted until on-line GEKO release by a SEAT/VW dealer.
Typical failure modes & engineering fixes
Problem │ Root cause / test │ Engineering remedy
──────────────────────────────────────┼────────────────────────────────────────────────────────┼──────────────────────────────────────────────
Logo-loop / no boot │ Bad NAND blocks, interrupted update │ Re-flash via recovery SD → if fails, reball/replace NAND (256 MB, TSOP48 or BGA depending on rev.)
LCD dark / low contrast │ CCFL-to-LED inverter FET or ribbon cable micro-crack │ Replace inverter FET; reseat ribbon; worst case swap LCD (Sharp LQ050... series)
No GPS satellites │ Open in Fakra, roof amp short, RF SAW dead │ Check 5 V at antenna, 50 Ω continuity, test with known-good antenna; replace GNSS module if deaf.
High quiescent current (>80 mA) │ Unit not entering sleep because CAN-GW too old │ Update or swap CAN-Gateway (rev ≥L), recode sleep-permission bits.
CD read error │ Dirty OPU or worm-gear, spindle motor low torque │ Clean lens, re-grease rails, replace drive (same Panasonic SRD V007).
• Map support: last official SEAT “Navigation FX V12” SD (2023-2024) still supports RNS 315. After 2024 the platform is frozen; open-source OSM conversions exist but violate licence agreements.
• Retrofit movement: many hobbyists replace RNS 315 with Android-Auto-capable MIB2 or aftermarket CarPlay units; CAN-Gateways ≥2015 and fascia adaptor are needed.
• Component-level repair services increasing due to scarcity of new OE units; BGA rework stations with lead-free profiles are standard practice.
• Sustainability trend: used/refurbished RNS 315 market remains active (≈200–300 €) as a drop-in upgrade for early Altea/Leon still on RCD 300/310 radios.
Pin-out excerpt (Quadlock “B” power connector):
• pin 15 = +12 V battery (KL30)
• pin 16 = GND
• pin 2 = Ignition (KL15)
• pin 6 = Illumination (KL58d)
• pins 9/10 = CAN-High / CAN-Low
Soft reset key combination: Press “<” + “>” + rotary (ON) simultaneously for ~10 s.
Firmware force-update: Hold “SETUP” + “EJECT” while applying power with update SD inserted.
Comparison with RNS 310: no internal flash (maps on DVD/SD), no Bluetooth integrated, slower CPU.
Comparison with RNS 510: bigger 6.5" 800×480, HDD maps, DVD video, but physically larger and higher current draw.
• Maps and firmware are protected by copyright; distributing image dumps is illegal in most jurisdictions.
• Security PIN circumvention or VIN component-protection removal via cracked tools may violate regional anti-theft and software-protection laws (EU Directive 2001/29/EC).
• When reselling used units, GDPR may apply if phonebooks or call logs remain in memory—perform factory reset.
• Ensure E-Waste regulations (e.g., EU WEEE) are observed when disposing of failed PCBs or LCDs containing leaded glass.
Implementation / installation checklist:
Potential challenges & mitigations
• Missing PIN → dealer can retrieve via VAG-T-Sec database (proof of ownership required).
• Component protection active → schedule on-line GEKO session (approx. 0.5 h labour).
• Retrofitting rear-view camera requires adding 26-pin green connector and coding byte 04 bit 4 = 1.
• Hardware internals differ slightly between index B, C, D units; “D” is the last SEAT revision with updated Bluetooth stack and 0360 firmware compatibility.
• No official CarPlay / Android Auto upgrade path exists for RNS 315; only third-party “SmartLink” piggy-back modules (retain video input).
• Touch panel is resistive → glove use possible but multi-touch absent.
• Detailed NAND pinout & J-TAG boundary scan for laboratory re-flash (forums: VW-Navi, Car-Hacking.ru).
• CAN-Bus reverse-engineering to display custom data (e.g., OBD PIDs) on RNS 315 screen.
• Evaluating open-source map loaders that respect licensing (possible via OSM + Mapbox offline tiles).
• Comparative EMI/ESD performance of RNS 315 vs modern MIB2 units in legacy PQ35 vehicles.
The part number 5P0035191D denotes a SEAT-badged RNS 315 radio-navigation head-unit built by TechniSat for Volkswagen-Group PQ-platform cars (2009-2015). It provides integrated GPS, CD/MP3, SD, Bluetooth, AUX and CAN-Bus vehicle functions in a double-DIN footprint. Successful installation hinges on correct CAN-Gateway compatibility, valid PIN/component protection clearance, and attention to common hardware faults such as NAND corruption, GPS front-end failure and sleep-mode battery drain. While map updates and repairs remain possible in 2024, owners increasingly migrate to newer MIB platforms for smartphone integration.
